6. The most desirable feature of transformer coupling is its :
(a) higher voltage gain
(b) wide frequency range
(c) ability to provide impedance matching between stages
(d) ability to eliminate hum from the output
7. A transformer coupled amplifier would give :
(a) maximum voltage gain
(b) impedance matching
(c) maximum current gain
(d) larger bandwidth
8. In multistage amplifiers, direct coupling is especially suited for amplifying :
(a) high frequency ac signals
(b) changes in dc voltages
(c) high-level voltages
(d) sinusoidal signals
9. The common-mode rejection ratio of an ideal diff-amp is :
(a) zero
(b) infinity
(c) less than unity
(d) greater than unity
10. A Darlington pair and an emitter follower have the same :
(a) input impedance
(b) current gain
(c) voltage gain
(d) power gain
Related Posts
Amplifiers » Exercise - 16. The overall bandwidth of two identical voltage amplifiers connected in cascade will : (a) remain the same as that of a single stage (b) be worse than that of a single stage (c) be better than that of a single stage (d) be better if stage gain is low and worse if stage gain is high- Amplifiers » Exercise - 116. Two stages of BJT amplifiers are cascaded by RC coupling. The voltage gain of the first stage is 10 and that of the second stage is 20. The overall gain of the coupled amplifier is : (a) 10×20 (b) 10+20 (c) (10+20)2 (d) (10×20)/2
- 555555555535. The total gain of a multistage amplifier is the ________. (a) sum of individual voltage gains (b) sum (c) (d)
- 555555555569. In an emitter-follower, the voltage gain is ________. (a) slightly less than 1 (b) slightly more than 1 (c) a very large value (d) None of the above
- Amplifiers » Exercise - 123. If the feedback fraction of an amplifier is 0.01, then voltage gain with negative voltage feedback is approximately ....... (a) 500 (b) 100 (c) 1000 (d) 5000