1.21. Two amplifiers have the characteristics shown in Ta-ble P1.21. If the amplifiers are cascaded in the order A-B,find the input impedance, output impedance, and open-circuitvoltage gain of the cascade. Repeat if the order is B-A.Table P1.21 Amplifier Characteristics for Problem 1.21.Open-CircuitVoltage Gain100InputResistanceOutputResistanceAmplifierA3 k2400 S25001 M220 2B

Cascading amplifiers in order A-B:

Answered: 1.21. Two amplifiers have the…

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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Similar questions

What are the voltage gain, input resistance, andoutput resistance of the amplifier as shownif R1 = 12 k and R2 = 120 k ? (b) Repeat forR1 = 160 k and R2 = 330 k ? (c) Repeat forR1 = 4.3 k and R2 = 270 k ?
Since the transistors used in the circuit are B=100, ro=∞ a) Find the re1, re2 resistance values by performing the DC analysis for each amplifier stage separately. b) Draw the AC equivalent circuit of the amplifier circuit. c)Find the input and output impedance values for each amplifier stage. d) Find the voltage gains AV1, AV2 for each amplifier stage. e) Find the voltage value VL by finding the AV1 Voltage gain.
Suppose that each output channel of a computer’ssound card can be represented by a 1-V ac sourcein series with a 32-Ω resistor. Each channel ofthe amplifier in the external speakers has an inputresistance of 20 k , and must deliver 10 W intoan 8-Ω speaker. (a) What are the voltage gain, currentgain, and power gain required of the amplifier?(b) What would be a reasonable dc power supplyvoltage for this amplifier?
Amplifier circuit is show below has a single ac input and one ac output. Assuming 2N2222 transistor: Construct the T-model of the transistor with all parameters labelled and evaluated. Assume room temperature. Draw a complete small signal circuit model, then find the voltage gain. Explain two characteristics of this amplifier. Calculate the current gain, the input resistance, and the output resistance.
a. Determine the dc levels for the currents (IB1, Ic, IC1, IE1, IB2, IC2, and IE2) and voltages (VB1, VC1, VE1,and VE2) of the direct-coupled amplifier. b. Determine the value of RE2 if VB2 = 6.38V for the direct-coupled amplifier for part (a).
Consider the common-source amplifier shown in Figure P11.50. The NMOS transistor has KP=50 μA/V2, L=5 μm, W=500 μm, Vto=1 V and rd=∞.a. Determine the values of IDQ, VDSQ and gm. b. Compute the voltage gain, input resistance, and output resistance, assuming that the coupling capacitors are short circuits for the ac signal. Repeat Problem P11.50 for an NMOS transistor having KP=50 μA/V2, W=600 μm, L=20 μm, Vto=2 V and rd=∞. Compare the gain with that attained in Problem P11.50.
Amplifier circuit is show below has a single ac input and one ac output. Assuming 2N2222 transistor: 1- Determine the Q point, then illustrate it on the transistor I-V characteristic curves. 2- Is the transistor in the active region? Explain thoroughly. 3- Construct the T-model of the transistor with all parameters labelled and evaluated. Assume room temperature. 4- Draw a complete small signal circuit model, then find the voltage gain. Explain two characteristics of this amplifier. 5- Calculate the current gain, the input resistance, and the output resistance.
(a) What are the Q-points of the transistors in the amplifier as shown if VCC = 22 V, VEE = 22 V, I1 = 200 μA, RE = 2.4 kΩ, R = 50 kΩ, βo = 80, and VA = 70 V? (b) What are the differential-mode voltage gain and input resistance? (c) What is the amplifier output resistance? (d) What is the common-mode input resistance? (e) Which terminal is the noninverting input? (f) What is thecommon-mode input range for the amplifier if current source I1 is replaced with an electronic current source that must have 0.75 V across it to operateproperly?
According to the circuit in Figure 2:a. Describe the functions of the capacitors in the circuit and their effect on the circuit.b. If the input resistance of RS was added to the amplifier circuit, what would its effect be on the circuit? Please explain.c. Explain the effect of the RL load resistance to be connected to the output of the amplifier circuit after the capacitor on the Circuit's AV strengthening.
(a) What are the Q-points of the transistors in the amplifier as shown if I1 =500 μA, R1 =1MΩ, I2 = 500 μA, R2 = 1 MΩ, and VCC = VEE = 7.5 V. Use βo = 80, VA = 75 V, Kp = 5 mA/V2, and VT P = −1 V. (b) What are the differentialmode voltage gain and input resistance and output resistance of the amplifier? (See Sec. 15.2.3.)
Class À Amplifier questions A. If the amplifier input signal is 10 mV, what is the effective output power Po(rms) and the efficiency. B. determine whether the amplifier operate in the class A region. C.If the amplifier is not operated in the class A operating region, what is the required bias resistorRB to ensure class A operation.
Determine the dc levels for the currents (IB1, IC1 and IE2 only) of the direct-coupled amplifier of Figure. Note that it is a voltage-divider bias configuration followed by a common-collector configuration; one that is excellent in cases wherein the input impedance of the next stage is quite low. The common-collector amplifier is acting like a buffer between stages.

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