Current Gains in BJT: There are two types of current gain in BJT i.e. α and β. Where. I E is the emitter current; I C is the collector current; I B is the base current; Common Base Configuration: Common Base Voltage Gain. In common base configuration, BJT is used as voltage gain amplifier, where the gain A V is the ratio of output voltage ... Objective: (a) Transient analysis of BJT inverter. (b) DC analysis (VTC) of BJT inverter. Outcome: To analyze transient & DC analysis of BJT inverter using P-spice Requirement of Software: P-spice, Model Editor. Theory:- BJT is a three terminal semiconductor device constructed with three doped semiconductorBJT Characteristics and Parameters Two important parameters, β DC (dc current gain) and α DC are used to analyze a BJT circuit. When a transistor is connected to dc bias voltages, as shown in Figure 6 for both npn and pnp types, V BB forward-biases the base-emitter junction, and V CC reverse-biases the base-collector junction.7 พ.ค. 2564 ... 2n3904 Circuit: Multisim's BJT Circuit Simulation and Analysis · (Note that the simulation circuit must be grounded!) · Pay attention to the ...This isn't unlike the "local NFB" one also finds in a degenerated BJT CE amplifier stage used to teach BJT circuits at school. There is NFB. But it's not global, but instead local to the subcircuit topology. ... BJT PNP and Zener diode circuit analysis problem. 5. 2.4V Zener diode regulator not clamping. 8. Is the beta of a BJT really the …DC bias with voltage feedback, Bias stabilization, Design of bias. Small Signals Modeling of BJT and their analysis: The r transistor model, Hybrid model,.Deriving BJT Operating points in Active Region –An Example In the CE Transistor circuit shown earlier V BB = 5V, R BB = 107.5 kΩ, R CC = 1 k Ω, V CC = 10V. Find I B,I C,V CE,β and the transistor power dissipation using the characteristics as shown below BB BB BE B R V V I − = By Applying KVL to the base emitter circuit By using this ...BJTs PNP and NPN schematic symbols. 3D model of a TO-92 package, commonly used for small bipolar transistors. A bipolar junction transistor ( BJT) is a type of transistor that uses both electrons and electron holes as charge carriers. In contrast, a unipolar transistor, such as a field-effect transistor (FET), uses only one kind of charge carrier. 12 ต.ค. 2565 ... In this post we are going to discuss the DC analysis of Bipolar Junction Transistors (BJT). ... circuit connect on the left hand side of the BJT's ...12/3/2004 Steps for DC Analysis of BJT Circuits 1/11 Jim Stiles The Univ. of Kansas Dept. of EECS Steps for D.C. Analysis of BJT Circuits To analyze BJT circuit with D.C. sources, we must follow these five steps: 1. ASSUME an operating mode 2. ENFORCE the equality conditions of that mode. 3. ANALYZE the circuit with the enforced conditions. 4.In this BJT Amplifier, the AC voltage waveform, which is applied at the base terminal, will be produced at the emitter terminal with unity voltage gain. This circuit has no phase shift between the input and output waveforms. The characteristics of the CC amplifier are mentioned below. High input resistance.device and it comes in two general types: the Bipolar Junction Transistor (BJT) and the Field Effect Transistor (FET). Here we will describe the system characteristics of the BJT configuration and explore its use in fundamental signal shaping and amplifier circuits. The BJT is a three terminal device and it comes in two different types. The npn ...Figure 4.31 Beta-stabilized circuit for Example 4.7. Approximate Analysis. In the above section we learned the "exact method", here we'll discuss the "approximate method" of analyzing the voltage divider of a BJT circuit. We can draw the input stage of a BJT based voltage-divider network as shown in the figure 4.32 below.Bipolar junction transistors (Also known as BJTs) can be used as an amplifier, filter, rectifier, oscillator, or even a switch, which we cover as an example in the first section. The transistor will operate as an amplifier or …A quick SPICE simulation (figure below) of the circuit in the figure below will verify our qualitative conclusions about this amplifier circuit. *common-emitter amplifier i1 0 1 dc q1 2 1 0 mod1 r 3 2 5000 v1 3 0 dc 15 .model mod1 npn .dc i1 0 50u 2u .plot dc v(2,0) .end . Common emitter schematic with node numbers and corresponding SPICE netlist.Redraw the AC equivalent circuit without CE and derive the voltage gain. \begin{equation} {v_c \over v_i} = -{R_3 \over r_e + R_4} \end{equation} DC Analysis. First we redraw the schematic using the BJT DC model. Capacitors are considered open circuit in DC and therefore are excluded. To convert a BJT into a short circuit we know that all DC voltage sources are short circuited. This statement doesn't make sense. The BJT is not being converted into a short circuit. Your professor is performing a standard ac analysis at the dc operating point of the emitter follower.Learn how a BJT voltage divider bias circuit works and why it is the preferred method of biasing a BJT. Two different analysis methods are shown; a more prec...This capacitive gain reducing feedback increases with frequency, reducing the high frequency response of a C-E amplifier. The approximate voltage gain of the C-E amplifier in Figure below is -RL/rEE. The emitter current is set to 1.0 mA by biasing. REE= 26mV/IE = 26mV/1.0mA = 26 Ω. Thus, Av = -RL/REE = -4700/26 = -181.BJT Circuit Analysis. In below figure you can see the basic bias circuitry arrangement of transistor. I E is the dc emitter current. I C is the dc collector current. V BE is the value of the voltage at base with respect to the emitter. V CB is value of voltage at collector with respect to the base.Chapter 5: BJT AC Analysis. BJT Transistor Modeling. A model is an equivalent circuit that represents the AC characteristics of the transistor. A model uses circuit elements that approximate the behavior of the transistor. - PowerPoint PPT Presentation. Text of Chapter 5: BJT AC AnalysisDC analysis (also called bias analysis) is the analysis of the constant DC supply voltages applied to the circuit that effect overall circuit operation. The device in analysis (the transistor) controls a large current with a small current ( the current flow from emitter to collector is controlled by the emitter to base current.Learn the basics of small signal model for BJT in this lecture from EE105 course at UC Berkeley. You will find the derivation of the model parameters, the analysis of common-emitter and common-base amplifiers, and the comparison of BJT and MOSFET models. This lecture is in PDF format and contains 28 slides. It is a semiconductor device and it comes in two general types: the Bipolar Junction Transistor (BJT) and the Field Effect Transistor (FET). Here we will describe the system characteristics of the BJT configuration and explore its use in fundamental signal shaping and amplifier circuits.2 Answers. Sorted by: 1. As always, it's helpful to first draw the DC and AC circuits. DC circuit: simulate this circuit – Schematic created using CircuitLab. The operating point is evident by inspection: IC = β 1 + βI2 = αI2 I C = β 1 + β I 2 = α I 2. VC = IC(75Ω α + 100kΩ β) +VBE V C = I C ( 75 Ω α + 100 k Ω β) + V B E.Here's the way I'd analyze this circuit: 1) By inspection, the emitter resistor is smaller than the collector resistor. So short C-E and calculate the voltage at that …12/3/2004 Steps for DC Analysis of BJT Circuits 1/11 Jim Stiles The Univ. of Kansas Dept. of EECS Steps for D.C. Analysis of BJT Circuits To analyze BJT circuit with D.C. sources, we must follow these five steps: 1. ASSUME an operating mode 2. ENFORCE the equality conditions of that mode. 3. ANALYZE the circuit with the enforced conditions. 4.Nov 25, 2021 · The large signal model is just a diode between base and emitter with a current source between collector and emitter whose equation is β.I b. The small signal model is the T or PI model where there is the AC dynamic resistance of the diode re between base and emitter and a current source again β.I b although this can be replaced with a voltage ... How to Connect a PNP Transistor in a Circuit. 2N3904 vs. 2N2222. BJT Datasheet Specifications. Transistor Maximum Junction Voltages, V CEO, V CBO, V EBO. Power …InvestorPlace - Stock Market News, Stock Advice & Trading Tips Today’s been a rather incredible day in the stock market. Some are callin... InvestorPlace - Stock Market News, Stock Advice & Trading Tips Today’s been a rather incre...An NPN BJT is used for an N-channel JFET and a PNP would be used with a P-channel JFET, typically driven from above (i.e., circuit flipped top to bottom). Figure \(\PageIndex{16}\): Constant current bias prototype. Ignoring the JFET for a moment, the BJT is configured as in two-supply emitter bias.4/6/2011 A Graphical Analysis of a BJT Amplifier lecture 1/18 Jim Stiles The Univ. of Kansas Dept. of EECS Graphical Analysis of a BJT Amplifier Consider again this simple BJT amplifier: We note that for this amplifier, the output voltage is equal to the collector-to-emitter voltage (O () CE v tvt= ). v OOo ()tV vt= + + V CC v i ()t V BB + − ...The schematic you show here is from LTspice, I believe. It's default NPN BJT has β = 100 β = 100 and ISAT = 100aA I SAT = 100 aA. Your "EveryCircuit" link is very unlikely to use the same default model. So LTspice probably will simulate different values. Just FYI.Course Outline: This course focuses on design and analysis of microelectronic circuits. At the end of the course, students will be able to design, analyze, and simulate analog microelectronic circuits comprised of a few transistors. Course content: • Basics of Semiconductor Physics (Chapter 2) • Diode Models and Circuits (Chapter 3)The equation for collector current vs. base current can tell us what collector current to expect: IC = β ⋅IB = 150 × 430μA = 65mA I C = β ⋅ I B = 150 × 430 μ A = 65 m A. By this model, collector current will be constant at 65mA. The model is naive, but it's good enough for a rough estimate of the time it will take the capacitor to ...This isn't unlike the "local NFB" one also finds in a degenerated BJT CE amplifier stage used to teach BJT circuits at school. There is NFB. But it's not global, but instead local to the subcircuit topology. ... BJT PNP and Zener diode circuit analysis problem. 5. 2.4V Zener diode regulator not clamping. 8. Is the beta of a BJT really the …Index Terms—current mirror, Widlar current source, bjt-memristor circuit, power analysis, noise analysis, total harmonic distortion. I. INTRODUCTION A. Basic Current Mirror Basically, current mirrors (CMs) are used to mirror a reference current multiple times from one designated source into another consuming circuits. For example, as it is shownDC analysis of the Bipolar Junction Transistor (BJT) 1 AC analysis of the Bipolar Junction Transistor (BJT) 1Equivalent Circuit of the transistorTransistor V...4/6/2011 A Graphical Analysis of a BJT Amplifier lecture 3/18 Jim Stiles The Univ. of Kansas Dept. of EECS The load line This equation is referred to as the amplifier’s load line, which we can graphically represent as: V The load line provides the circuit relationship (via KVL) between i C and CE v . The value of i C and CEBiasing Techniques (BJT) PDF Version. In the common-emitter section of this chapter, we saw a SPICE analysis where the output waveform resembled a half-wave rectified shape: only half of the input waveform was reproduced, with the other half being completely cut off. Since our purpose at that time was to reproduce the entire waveshape, this ...In the circuit shown, transistors Q_{1} and Q_{2} are biased at a collector current of 2.6mA.Assuming that transistor current gains are sufficiently large to assume collector current equal to emitter current and thermal voltage of 26 mV, the magnitude of voltage gain V_{0}/V_{s} in the mid-band frequency range is _____ (up to second decimal place). Another model commonly used to analyze BJT circuits is the h-parameter model, also known as the hybrid equivalent model, closely related to the hybrid-pi model and the y-parameter two-port, but using input current and output …electronic circuit with one terminal being common to both the input and output. Each method of connection responding differently to its input signal within a circuit as the static characteristics of the transistor vary with each circuit arrangement. • 1. Common Base Configuration - has Voltage Gain but no Current Gain. • • 2. The results of a transient analysis are shown in Figure \(\PageIndex{6}\) for a 100 mV peak input signal. Figure \(\PageIndex{6}\): Transient analysis of the common source amplifier. First, the inversion between the input (blue trace) and output (red trace) is obvious. Also, some distortion is evident in the output waveform.Next, you will learn how to perform DC and ac analysis. You will get familiar with stability factors and maximum output symmetrical swing, and learn how to design a BJT circuit for maximum stability, maximum output symmetrical swing, and maximum gain. In this course, you will learn different types of BJT amplifier configurations (CE, CB, and CC). Learn how a BJT voltage divider bias circuit works and why it is the preferred method of biasing a BJT. Two different analysis methods are shown; a more prec...The large signal model is just a diode between base and emitter with a current source between collector and emitter whose equation is β.I b. The small signal model is the T or PI model where there is the AC dynamic resistance of the diode re between base and emitter and a current source again β.I b although this can be replaced with a voltage ...Normally, I B should be significantly greater than I B (min) to ensure that the transistor is saturated. Learn the Bipolar Junction Transistor (BJT) basics on this study guide from CircuitBread. The BJT is constructed with three doped semiconductor regions. 14 พ.ย. 2557 ... Bipolar Junction Transistor Circuit Analysis. EE314. BJT Transistor Circuit Analysis. Large signal DC analysis Small signal equivalent ...Redraw the AC equivalent circuit without CE and derive the voltage gain. \begin{equation} {v_c \over v_i} = -{R_3 \over r_e + R_4} \end{equation} DC Analysis. First we redraw the schematic using the BJT DC model. Capacitors are considered open circuit in DC and therefore are excluded. It is a semiconductor device and it comes in two general types: the Bipolar Junction Transistor (BJT) and the Field Effect Transistor (FET). Here we will describe the system characteristics of the BJT configuration and explore its use in fundamental signal shaping and amplifier circuits.May 21, 2020 · The fixed base bias circuit, which is exactly demonstrated by the above diagram, is simple to execute but tends to be unstable over the active operation. Also, the DC operating point may fluctuate due to varying temperatures. A slight improvement is achieved with the following circuit, where the transistor is configured in collector-feedback bias. A common BJT small signal model is the Hybrid-pi model, shown in Fig. 2. Fig. 2 Hybrid-pi small signal model BJT analysis circuit. Often, small signal model BJT analysis values may also be present on the datasheet. Although, these can be helpful, they are usually limited to a specific condition(s).The load-line analysis of the emitter-bias BJT circuit is quite similar to our earlier discussed fixed-bias configuration. The only difference being the level of IB [as derived in our Eq.(4.17)] defines the level of IB on the characteristics as shown in the following Fig. 4.24 (indicated as IBQ).In this article, we're going to show how to perform DC analysis of this transistor circuit. DC Analysis. When doing DC analysis, all AC voltage sources are taken out of the circuit because they're AC sources. DC analysis is concerned only with DC sources. We also take out all capacitors because in DC, capacitors function as open circuits. Get the latest tools and tutorials, fresh from the toaster. Learn Bipolar Junction Transistors (AC Analysis) equations and the formulas for Bipolar Transistor Configurations such as Fixed-Bias Configuration & more.device and it comes in two general types: the Bipolar Junction Transistor (BJT) and the Field Effect Transistor (FET). Here we will describe the system characteristics of the BJT configuration and explore its use in fundamental signal shaping and amplifier circuits. The BJT is a three terminal device and it comes in two different types. The npn ...4 ส.ค. 2556 ... 5.7 V<br />. 12/3/2004 <strong>Example</strong> DC <strong>Analysis</strong> <strong>of</strong> a <strong>BJT</strong> ...Analyze small signal combination BJT/JFET amplifier circuits. Discuss applications that make use of the JFET's ohmic region. 11.1: Introduction. 11.2: Simplified AC Model of the JFET. 11.3: Common Source Amplifier. 11.4: Common Drain Amplifier. 11.5: Multi-stage and Combination Circuits. 11.6: Ohmic Region Operation. 11.7: Summary.The BJT differential amplifier is a two-input circuit that amplifies the difference between two input signals, V1 and V2 applied to the base terminals of two BJTs (Bipolar Junction Transistors), which are configured in a differential pair configuration (see figure below). The basic differential pair configuration consists of two BJTs wherein ...To study DC and AC analysis of BJT-amplifier circuits. 2. Introduction. 2 Transistor. Transistor is a kind of active and three-terminal device, which is a fundamental component for the integrated circuits found in electronics and computers. There are two types of transistors: bipolar junction transistors (BJTs) and field-effect transistors (FETs).In a low frequency region of the single stage BJT amplifier, it is the RC combinations formed by the capacitors \$ C_{in},C_E,C_{out} \$ -Electronic Devices and Circuit Theory-Boylestad. Considering the equivalent circuit formed as shown in fig.1 . The output voltage and input voltage are related by:After the BJT has been biased, we can focus on small-signal operation, and small-signal analysis is easier when we replace the BJT with simpler circuit elements that produce functionality equivalent to that of the transistor. Just remember that these models are relevant only to small-signal operation, and furthermore, you can’t use the models ...Q1 VCC 5V VIN + 2V IS=1e-16 = 100 SPICE solves the system of nonlinear equations to obtain the voltages and currents Is this circuit in the active region? IC 1.221 mA RC 1E3W IB RB 100E3W Q1 Default 12.206 μA …simulate this circuit – Schematic created using CircuitLab. Figure 1. Step 2) In your nodal analysis equation from step 1, replace I B with an equivalent term that includes V O (whose value is unknown) and other terms whose values are known: I R L = I E = I C + I B = β I B + I B = I B ( β + 1) = V O / R L → I B = V O R L ( β + 1) Step 3 ...Mar 17, 2022 · Using the common-emitter amplifier circuit shown in the figure as an example, the use of equivalent circuits assists with analyzing circuits. DC analysis of a common-emitter amplifier circuit begins with determining the dc bias values and then removing coupling and bypass capacitors, the load resistor, and the signal source to produce a dc ... The fixed base bias circuit, which is exactly demonstrated by the above diagram, is simple to execute but tends to be unstable over the active operation. Also, the DC operating point may fluctuate due to varying temperatures. A slight improvement is achieved with the following circuit, where the transistor is configured in collector-feedback bias.Theory: Approximate Analysis In this chapter, we will only consider operation at frequencies large enough where coupling capacitors C 1 and C 2 can be approximated to be short-circuits. Furthermore, we will not consider frequencies which so high that the intrinsic capacitances of the BJT itself affect circuit performance. These capacitances ...This video gives a description of what AC analysis is, how it can be separated from DC analysis and how to create an AC model of a BJT circuit.Design and Analysis of Diode Circuits 24 BJT 25 BJT (cont.) 26 BJT (cont.) 27 Quiz 3 28 Op Amp 29 Op Amp (cont.); Fundamental Amplifier Circuits; Input/Output Impedance 30 Op Amp (cont.); Active Filters; Superdiode, Log, Antilog Filters 31 Control Fundamentals 32 Control 33 Op Amp ...You will get familiar with stability factors and maximum output symmetrical swing, and learn how to design a BJT circuit for maximum stability, maximum output symmetrical swing, …Solve various BJT biasing circuits for device currents and voltages. Plot DC load lines for a variety of BJT biasing circuits. Discuss methods to increase circuit …Q1 VCC 5V VIN + 2V IS=1e-16 = 100 SPICE solves the system of nonlinear equations to obtain the voltages and currents Is this circuit in the active region? IC 1.221 mA RC 1E3W IB RB 100E3W Q1 Default 12.206 μA …These equations show that, in the active mode, the BJT can be modelled as a dependent current-controlled current source. Thus, in circuit analysis, the dc equivalent model in Figure.(4b) may be used to replace the npn transistor in Figure.(4a). Since β in Equation.(6) is large, a small base current controls the large current in the output circuit.A Bipolar Junction Transistor (also known as a BJT or BJT Transistor) is a three-terminal semiconductor device consisting of two p-n junctions which are able to amplify or magnify a signal. It is a current controlled device. The three terminals of the BJT are the base, the collector and the emitter. A BJT is a type of transistor that uses both ...electronic circuit with one terminal being common to both the input and output. Each method of connection responding differently to its input signal within a circuit as the static characteristics of the transistor vary with each circuit arrangement. • 1. Common Base Configuration - has Voltage Gain but no Current Gain. • • 2.DC Biasing of BJTsBJT DC Analysis BJT DC Analysis 1.Draw the DC equivalent circuit (signal frequency is zero, i.e., f = 0) a)Capacitors are open circuit, i.e., X C!1. b)Kill the AC power sources (short-circuit AC voltage sources and open-circuit AC current sources). c)Inductors are short circuit or replaced by their DC resistance (winding ...Also how can we compare these two gains as BJT is current controlled current source with input current Ib and output current Ic whereas MOSFET is a voltage controlled current source with input a voltage Vg and output a current Id. This question sounds pretty useless and barely meaningful without an application in mind.In this video, I explain how to solve BJT circuits, and why we like to use the approximation of Vbe,on = 0.7V (or 0.5V, or 0.6V). I solve a simple BJT circui...BJT AC Analysis The re Model for CB As shown in the figure, it is the common- base BJT circuit. Now, re model is introduced. On the input port, there is a resistor, re . where re = 26mV / IE (Eq. 5.1) The subscript e of re indicates that it is the dc level of IE that determines the ac level of the resistance.To study DC and AC analysis of BJT-amplifier circuits. 2. Introduction. 2 Transistor. Transistor is a kind of active and three-terminal device, which is a fundamental component for the integrated circuits found in electronics and computers. There are two types of transistors: bipolar junction transistors (BJTs) and field-effect transistors (FETs).Objective: (a) Transient analysis of BJT inverter. (b) DC analysis (VTC) of BJT inverter. Outcome: To analyze transient & DC analysis of BJT inverter using P-spice Requirement of Software: P-spice, Model Editor. Theory:- BJT is a three terminal semiconductor device constructed with three doped semiconductorTo accelerate its mission to "automate electronics design," Celus today announced it has raised €25 million ($25.6 million) in a Series A round of funding. Just about every electronic contraption you care to think of contains at least one p...Get the latest tools and tutorials, fresh from the toaster. Learn Bipolar Junction Transistors (DC Analysis) equations and know the formulas for the Bipolar Transistor Configurations. Learn more!Deriving BJT Operating points in Active Region –An Example In the CE Transistor circuit shown earlier V BB = 5V, R BB = 107.5 kΩ, R CC = 1 k Ω, V CC = 10V. Find I B,I C,V CE,β and the transistor power dissipation using the characteristics as shown below BB BB BE B R V V I − = By Applying KVL to the base emitter circuit By using this ...For the emitter current estimate: Start with a guess that VBE = 700mV V BE = 700 mV and estimate the emitter current as +15V−700mV−(−20 V) 10kΩ = 3.43mA + 15 V − 700 mV − ( − 20 V) 10 k Ω = 3.43 mA. Sanity check the VBE = 700mV V BE = 700 mV estimate by computing 26mV ⋅ ln(3.43mA 1fA) ≈ 750mV 26 mV ⋅ ln. .Then for the AND gate the top switch must give a follower voltage with the B-E diode drop ~ 600 mV drop and this only reduces the Voh or V output-high by that much. But still a logic “1” when high. So the output will drop 2 diode drops from V2 when both NPN’s inputs are high at 6V. E.g. if V2=5V Voh=5-1.2= 3.8V.Next, you will learn how to perform DC and ac analysis. You will get familiar with stability factors and maximum output symmetrical swing, and learn how to design a BJT circuit for maximum stability, maximum output symmetrical swing, and maximum gain. In this course, you will learn different types of BJT amplifier configurations (CE, CB, and CC).Step 1 – ASSUME an operating mode. Let’s ASSUME the BJT is in the ACTIVE region ! of Remember, this is just a guess; we have no way knowing for sure what mode the BJT is …In BJT analysis, a load line is a line drawn over collector curves to show every possible operating point of a transistor. Or on a load line, there are valid values of I C and V CE . I am going to consider a base bias amplifier circuit.In this video, I explain how to solve BJT circuits, and why we like to use the approximation of Vbe,on = 0.7V (or 0.5V, or 0.6V). I solve a simple BJT circui...Get the latest tools and tutorials, fresh from the toaster. Learn Bipolar Junction Transistors (AC Analysis) equations and the formulas for Bipolar Transistor Configurations such as Fixed-Bias Configuration & more.In this lecture we will solve bjt circuit problems as well as we will do bjt circuit analysis and we will understand how to calculate1. beta dc2. alpha dc3. ...Figure 7: Basic ac h parameters. The four basic AC h parameters are h i, h r, h f and h o. Each of the parameters carries a second subscript to designate the common-emitter (e), common-base (b), or common-collector (c) amplifier configuration. Figure 8: Subscripts of h parameters for each amplifier configuration. . DC analysis (also called bias analysis) is the analysis ofBJT is the short form of Bipolar Junction Transistor, it is Complex circuits cannot be reduced to a single resister and contain components that are neither a series nor a parallel. In this type of circuit, resistors are connected in a complicated manner. A widely used small signal circuit model is Voltage, resistance and current are the three components that must be present for a circuit to exist. A circuit will not be able to function without these three components. Voltage is the main electrical source that is present in a circuit. To study DC and AC analysis of BJT-amplif...

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