Derive the output resistance using small signal model for the following circuits, assuming the transistor has output resistance of a transistor is ro and transconductance of gm. Vdd Rout Rout Vb-. VboH Rout Rout Vdd Vb bH Rout

Derive the output resistance using small signal model for the following circuits, assuming the transistor has output resistance of a transistor is ro and transconductance of gm. Vdd Rout Rout Vb-. VboH Rout Rout Vdd Vb bH Rout

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Prelab: Using the BJT large signal model for the circuit in Figure 1, determine the Vub voltage required to drive a collector current of I, = 0.5 mA. Use RB = 220 kN, Rc = 2.05 kN, RE = 1.05 kN, and Vee = 5V. Assume Is = 50nA and ß = 250. (Hint: Find Vbe using Ic, then use KVL to find Vbb, remember that Ib can be found using the Ic/ ß relationship) RC Voc R3 bb RE Figure 1 NPN BJT under DC Bias
VcC R2 RC- RI RL R1 RE VEE Assume: B=100, VA=150, Vcc=12V, VɛE=GND, R=2K, R1=160K, R2=300K, Rɛ=3K, Rc=2.2K, and R1=100K. A.)For the circuit draw the AC equivalent circuit (including the small signal model for the transistor). Then compute r„, ľo, and gm. Then compute Av (the gain for the entire circuit), and Rin (for the whole circuit). B.)Convert the circuit to a common-collector circuit. Draw the new circuit (assume the same values for the input and load resistances). Then compute the terminal voltage gain, and Rin (for the whole circuit), re-computing any parameters that you need to solve.
Two PNP transistors are connected to form a Darlington pair to create a single stage amplifier. Both transistors have the same B. Assume that is large such that 3+ 1 ~ B. Vcc 028² 028 9m2 RL 2+9m2 RL VIN PNP Darlington Pair Used as an Amplifier 1. If the Darlington pair is to be treated as a single transistor, what is the overall 3 if the "emitter current" is IOUT? OB² 9m2 Rp 1+9m2 RL RL 9m2 RL iOUT 2. Calculate the approximate expression for Ay. User1 and gm1 for the parameters of Q1 while 2 and for the parameters of Q2. Assume VA → ∞ for both transistors. 9m2 -9m2 RL 2 VOUT
In this voltage divider bias circuit, the input is at the base. Output is at the emitter with a high input resistance and low output resistance. The maximum voltage gain is 1 and the coupling capacitors must have a negligible reactance at the frequency of operation. (use to answer a and b) a. Derive the expression for the voltage gain, current gain, and power gain in terms of power delivered to the load, R. b. Sketch both the DC and AC equivalent circuits. c. Derive the expression for ripple factor of Half Wave Rectification with a capacitor filter.
ASAP
A. For the configuration shown below in 4(A), find the small signal voltage gain (Voutp-Voutm)/Vin B. For the configuration shown in 4(B), find the following parameters (a) DC value of output voltage, (b) input common mode range and (c) small signal voltage gain when all transistors are in saturation vou/Vin as indicated in the diagram; Assume no body bias on M1 ad M2 For this problem ONLY, assume the following device parameters V7, = \V| = 0.5V;K, = k ,' = 100 µA / V²,a, = a, = 0.01 VDD = 3V (10/1) M, M. (10/1) (10/1) M, |M, (10/1) Voutp 20kΩ м, (200/1) м, м, (10/1) м, Vin (1/1) м, M. (10/1) + Vin DC VAN M, 100HA (1/1) M, M, (10/1) (A) (B) V. =-1V
A transistor amplifier circuit is biased so that the quiescent point is to the far left of the load line midpoint. What do you expect to occur when the input voltage begins to vary? O The output voltage will be distorted on the bottom because it will hit the lower limit for VCE before the input voltage arrives at its peak. The output voltage will be distorted on the top because it will hit the upper limit for VCE before the input voltage arrives at its peak. O The output voTransistor's output voltage will look like the input voltage amplified and inverted. The output voltage will be zero (flat).
Q4. For the circuit shown in Figure Q4: i) What is the type of MOSFET and the amplifier configuration? ii) Find the Q-point (Ip and Vps) iii) What is the device transconductance, gm? iv) What are the voltage gain and output voltage? v) Draw the input /output voltage waveforms showing the phase relationship between them. Be sure to label them properly. +20V IDON = 15 mA@ VcsON = 6V VGSTH = 1V 1kQ Rp C2 10M2 Ro1 out Vin 3.3MQ Ra, 47003 Rs 50mV Figure Q4
2. The parameters of the transistor as shown in the figure below are ß = 100 and VA = 100V. a. Find the dc voltages at the base and emitter terminals. b. Find Rc such that VCEQ = 3.5V. c. Assuming Cc and CE act as short circuits, determine the small-signal voltage gain Av = Vo/Vs. d. Repeat part (c) if a 5000 source resistor is in series with the vs signal source. V+ = +5 V Rs = 100 £2 www Us Cc RB = 10 ΚΩ I= Iausmi 0.35 mA www RC -000 V=-5 V CE
Hand Calculation: Since you now have the values of R1 and R2 resistors, obtain numeric value of voltage gain Av=Vo/Vi, and numerical values of input and output resistances Ri and Ro. Note that you need to DC analysis first. Do a hand calculation and calculate the DC collector current or IC. This is needed in order to calculate the small signal parameters gm and rπ and in turn to obtain the Av , Ri and Ro Hence, first perform a DC analysis (use the circuit in Figure 1 and take all capacitors open) and assume your transistor has a β=140.
4. A Darlington transistor is essentially an array of two transistors connected as shown below. Assume both transistors follow our simple model with a current gain of B=100. Determine the maximum value of R2 that will just saturate the transistors, and pass full current through the load resistance R1. v2 V2 R2 PULSE (0 5 0) Q2 NPN R1 10 Q1 NPN V1 24
Which of the following is the basic feature of the emitter-connected amplifier circuit? I. It has voltage gain II. It has current gain III. There is a 180 degree phase difference between the input signal and the output signal