Q: Design a BJT differential amplifier such as that operates between + 2.5V voltage supplies and to provide differential gain of 40 V/V for differential output (Va-Va). The power dissipation in the quiescent state (Power supplied from DC voltage sources) should not exceed 2mW. Vr = 25.7 mV a) Draw small signal equivalent circuit and derive the expression of common mode gain (Acm) for one sided output. b) Calculate the resistance of Io current source in case ICMRRI=480 for one sided output. Calculate Acm according to step (a). c) In order to obtain this resistance by using a current mirror (CM) topology, discuss which topology is suitable and provide the reasons for your decision.

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Q: Design a BJT differential amplifier such as that operates between + 2.5V voltage supplies
and to provide differential gain of 40 V/V for differential output (Va-Va). The power
dissipation in the quiescent state (Power supplied from DC voltage sources) should not
exceed 2mW. Vr = 25.7 mV
a) Draw small signal equivalent circuit and derive the expression of common mode gain
(Acm) for one sided output.
b) Calculate the resistance of Io current source in case ICMRRI-480 for one sided output.
Calculate Acm according to step (a).
c) In order to obtain this resistance by using a current mirror (CM) topology, discuss which
topology is suitable and provide the reasons for your decision.
d) Sketch the final version of the differential amplifier by adding the suitable CM and show
the required biasing conditions.
Rc
ww.
www
Transcribed Image Text:Q: Design a BJT differential amplifier such as that operates between + 2.5V voltage supplies and to provide differential gain of 40 V/V for differential output (Va-Va). The power dissipation in the quiescent state (Power supplied from DC voltage sources) should not exceed 2mW. Vr = 25.7 mV a) Draw small signal equivalent circuit and derive the expression of common mode gain (Acm) for one sided output. b) Calculate the resistance of Io current source in case ICMRRI-480 for one sided output. Calculate Acm according to step (a). c) In order to obtain this resistance by using a current mirror (CM) topology, discuss which topology is suitable and provide the reasons for your decision. d) Sketch the final version of the differential amplifier by adding the suitable CM and show the required biasing conditions. Rc ww. www
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