The tail current in a differential amplifier equals ______________?
Correct answer: B. sum of two emitter currents
- A. difference between two emitter currents
- B. sum of two emitter currents
- C. collector current divided by current gain
- D. collector voltage divided by collector resistance
Explanation
The tail current is the total current supplied to the two transistor emitters, so it equals I_E1 + I_E2. In a balanced differential pair, each emitter carries approximately half of the tail current.
Last updated
Practise Electronics and Devices
758 free Electronics and Devices MCQs from Electrical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Electrical Engineering questions like this
Electrical Engineering is on 2 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
1 db corresponds to_____________change in power level?
A 1,000 V power supply would use_____________ as a filter capacitor?
A 10 V power supply would use ____________ as filter capacitor?
A 2-transistor class B power amplifier is commonly called ______________ amplifier?
A 25eV electron has a speed of______________?