Explanation: Current mirror has DC resistance (order of few kΩ), as quiescent voltage across it is a fraction of supply voltage and current in milliampere. 7. What is the equation of load current for a differential amplifier with an active load?
A. IL = gm×vd
B. IL = Iq /2
C. IL = β×Iq×( Vin1 – Vin2)
D. IL = 2×gm/( Vin1 – Vin2)
Answer:A
Explanation: Current mirror has DC resistance (order of few kΩ), as quiescent voltage across it is a fraction of supply voltage and current in milliampere. 7. What is the equation of load current for a differential amplifier with an active load?
A. IL = gm×vd B. IL = Iq /2 C. IL = β×Iq×( Vin1 – Vin2) D. IL = 2×gm/( Vin1 – Vin2)
Explanation: The load current is given as product of difference between input & output voltage and transconductance. Therefore, the equation of load current is ,