The feedback amplifier in Figure 1 has Rs = 20kΩ, R1 = 10kΩ, R2 = 100kΩ, R3 = 100kΩ and RL = 10kΩ. It uses an operational amplifier with the following parameters: • Open-loop gain a = 100,000 V/V • Input resistance ri = 200kΩ • Output resistance ro = 100Ω Find the following closed-loop parameters of the circuit, taking into account the loading effects of the source resistance, the load resistance and the feedback network: (a) Feedback factor ƒ (b) Voltage gain Avƒ = vL /vs (c) Input resistance Rinƒ (d) Output resistance Routƒ
The feedback amplifier in Figure 1 has Rs = 20kΩ, R1 = 10kΩ, R2 = 100kΩ, R3 = 100kΩ and RL = 10kΩ. It uses an operational amplifier with the following parameters: • Open-loop gain a = 100,000 V/V • Input resistance ri = 200kΩ • Output resistance ro = 100Ω Find the following closed-loop parameters of the circuit, taking into account the loading effects of the source resistance, the load resistance and the feedback network: (a) Feedback factor ƒ (b) Voltage gain Avƒ = vL /vs (c) Input resistance Rinƒ (d) Output resistance Routƒ
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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The feedback amplifier in Figure 1 has Rs = 20kΩ, R1 = 10kΩ, R2 = 100kΩ, R3 = 100kΩ and RL = 10kΩ. It
uses an operational amplifier with the following parameters:
• Open-loop gain a = 100,000 V/V
• Input resistance ri = 200kΩ
• Output resistance ro = 100Ω
Find the following closed-loop parameters of the circuit, taking into account the loading effects of the source
resistance, the load resistance and the feedback network:
(a) Feedback factor ƒ
(b) Voltage gain Avƒ = vL /vs
(c) Input resistance Rinƒ
(d) Output resistance Routƒ
Transcribed Image Text:Rs
Vs
www
R3
www
R₂
Figure 1 Feedback amplifier.
RL
R1
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