1. For this circuit, assume all the npn transistors are identical with VBE(ON)=0.6V. Ignore the Early effect for now (VA=infinity). a. What are Icopy1 and Icopy2 if you ignore the base currents (that is if you assume Beta-infinity)? b. What are Icopy1 and Icopy2 if you assume Beta=50? c. What resistor should replace the IREF circle to get IREF=0.2mA if Vcc = 5V? Vcc IREF 0.2 mA I copy1 AE copy2 Q2 10 AE 4AE

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1. For this circuit, assume all the npn transistors are identical with VBE(ON)=0.6V. Ignore the Early
effect for now (VA=infinity).
a. What are Icopy1 and Icopy2 if you ignore the base currents (that is if you assume
Beta-infinity)?
b. What are Icopy1 and Icopy2 if you assume Beta=50?
c. What resistor should replace the IREF circle to get IREF=0.2mA if Vcc = 5V?
Vcc
IREF O 0.2 mA
I copy1
Q1
AE
I copy2
Q2
10 AE
4AE
Transcribed Image Text:1. For this circuit, assume all the npn transistors are identical with VBE(ON)=0.6V. Ignore the Early effect for now (VA=infinity). a. What are Icopy1 and Icopy2 if you ignore the base currents (that is if you assume Beta-infinity)? b. What are Icopy1 and Icopy2 if you assume Beta=50? c. What resistor should replace the IREF circle to get IREF=0.2mA if Vcc = 5V? Vcc IREF O 0.2 mA I copy1 Q1 AE I copy2 Q2 10 AE 4AE
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