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Electronic Devices and Circuits: Introduction to Differential Amplifiers
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Electronic Devices and Circuits: Introduction to Differential Amplifiers
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20 Questions

1. Voltage-divider bias has a relatively stable Q-point, as does_________
2. In Common Mode Differential Amplifier, the outputs Vout1 and Vout2 are related as:
3. The Differential output of the difference amplifier is the amplification of __________
4. What is the Q-point for a fixed-bias transistor with IB = 75 µ A , βDC = 100, VCC = 20 V, and RC = 1.5 K Ohm?
5. Which transistor bias circuit provides good Q-point stability with a single-polarity supply voltage?
6. If for an amplifier v1 and v2 are the input signals, vc and vd represent the common mode and differential signals respectively, then the expression for CMRR (Common Mode Rejection Ratio) is
7. What is the most common bias circuit?
8. The most stable biasing technique used is the ____________
9. The Maximum and minimum output of the Differential amplifiers is defined as:
10. The linear (active) operating region of a transistor lies along the load line below ________ and above ___________
11. Which transistor bias circuit arrangement has poor stability because its Q-point varies widely with β DC?
12. Emitter bias requires _______
13. The inputs to the differential amplifier are applied at __________
14. The input resistance of the base of a voltage-divider biased transistor can be neglected _________
15. Ideally, for non linear operation, a transistor should be biased so that the Q-point is ________
16. The problem with the single operational difference amplifier is its
17. The difference output of the basic differential amplifier is taken at ___________
18. If for an amplifier the common mode input signal is vc, the differential signal id vd and Ac and Ad represent common mode gain and differential gain respectively, then the output voltage v0 is given by
19. In a small signal differential gain vs input CM level graph, the gain decreases after V2 due to:
20. For the difference amplifier which of the following is true?

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