ANALOG ELECTRONICS 1

11. Notch is also called as
a) band-pass filter
b) low-pass filter
c) high-pass filter
d) narrow-band reject filter
ans: d

12. The filter which exhibits ac equiripple in the pass-band and monotonic characteristic in stop band is
a) Buttorworth
b) Chebyshev
c) Bessel
d) Elliptic
ans: a

13. A multiplier which can accept input voltages of either polarity and can produce output voltage of both polarities is called
a) Bi-quadrant multiplier
b) four quadrant multiplier
c) two quadrant multiplier
d) one quadrant multiplier
ans: c

14. A multiplier is derived using two logarithmic amplifiers and and antilog amplifier . One more section required is
a) multiplier
b) adder
c) subtractor
d) divider
ans: b

15. A frequency multiplier usually operates in
a) push-pull
b) class A
c) class B
d) class C
ans: d

16. FSK demodulation is an application of
a) PLL
b) timer
c) BPF
d) none of the above
ans: a

17. An oscillator whose frequency is changed by a variable dc voltage is known as
a) a crystal oscillator
b) a VCO
c)  an Armstrong oscillator
d) a piezoelectric device
ans: b

18. The integrated circuit chip NE/SE 566 is a
a) Schmitt trigger
b) power amplifier
c) video amplifier
d) voltage controlled oscillator
ans: d

19. For a step input , the output of an integrator is
a) a pulse
b) a triangular waveform
c) a spike
d) a ramp
ans: d

20. The damping factor of a second order active low pass filter to give butterworth response is
a) 1.732
b) 1.414
c) 0.707
d) none of the above
ans: b