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Design a BJT differential amplifier that provides two single-ended outputs (at the collectors). The amplifier is to have a differential gain (to each of the two outputs) of at least 100V/V, a differential input resistance ≥ 10k2, and a common-mode gain (to each of the two outputs) no greater than 0.1 V/V. Use a 2-mA current source for biasing. Give the complete circuit with component values and suitable power supplies that allow for +-2V swing at each collector and input common-mode voltage as high as +3 V. Specify the minimum values that the output resistance of the bias current source must have. If the current source is realized by a simple mirror, what must the minimum value of VA be? The BJTs available have ß≥ 100. What is the value of the input common-mode resistance when the bias source has the lowest acceptable output resistance? Show the diagram of the designed circuit with the various component values.

Design a BJT differential amplifier that provides two single-ended outputs (at the collectors). The amplifier is to have a differential gain (to each of the two outputs) of at least 100V/V, a differential input resistance ≥ 10k2, and a common-mode gain (to each of the two outputs) no greater than 0.1 V/V. Use a 2-mA current source for biasing. Give the complete circuit with component values and suitable power supplies that allow for +-2V swing at each collector and input common-mode voltage as high as +3 V. Specify the minimum values that the output resistance of the bias current source must have. If the current source is realized by a simple mirror, what must the minimum value of VA be? The BJTs available have ß≥ 100. What is the value of the input common-mode resistance when the bias source has the lowest acceptable output resistance? Show the diagram of the designed circuit with the various component values.

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
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Design a BJT differential amplifier that provides two single-ended outputs (at the collectors). The amplifier is to have a differential gain (to each of the two outputs) of at least 100V/V, a differential input resistance ≥ 10k2, and a common-mode gain (to each of the two outputs) no greater than 0.1 V/V. Use a 2-mA current source for biasing. Give the complete circuit with component values and suitable power supplies that allow for +-2V swing at each collector and input common-mode voltage as high as +3 V. Specify the minimum values that the output resistance of the bias current source must have. If the current source is realized by a simple mirror, what must the minimum value of VA be? The BJTs available have ß≥ 100. What is the value of the input common-mode resistance when the bias source has the lowest acceptable output resistance? Show the diagram of the designed circuit with the various component values.
Transcribed Image Text:Design a BJT differential amplifier that provides two single-ended outputs (at the collectors). The amplifier is to have a differential gain (to each of the two outputs) of at least 100V/V, a differential input resistance ≥ 10k2, and a common-mode gain (to each of the two outputs) no greater than 0.1 V/V. Use a 2-mA current source for biasing. Give the complete circuit with component values and suitable power supplies that allow for +-2V swing at each collector and input common-mode voltage as high as +3 V. Specify the minimum values that the output resistance of the bias current source must have. If the current source is realized by a simple mirror, what must the minimum value of VA be? The BJTs available have ß≥ 100. What is the value of the input common-mode resistance when the bias source has the lowest acceptable output resistance? Show the diagram of the designed circuit with the various component values.
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