Question

(a) What are the output current and output resistance for the cascode current source as shown if IREF = 20 μA, βFO = 110, and VA = 60 V? (b)What is the value of VCS for this current source? (c) What is the minimum value of VCC?

+Vcc
lo
IREF
Q2

Image Transcription

+Vcc lo IREF Q2

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