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What part of the characteristic curve of a diode is useful for log amplifiers ?
(ಹಿ) The log region above 0.7 V
(B) The log region below ۷
(C) The log region between 0 ५ and 0.7 V
மு) 116 log region below the zener voltage

The main purpose of an instrumentation amplifier is to amplify signals that are
riding on common mode voltages.

(A) small, small (B) 1411, large

(C) 181, small 0) large, large
The filter which provides a roll-off rate greater than — 20 /dB / decade / pole and are

useful when a rapid roll-off required is
(A) Butterworth (B) Chebyshev
(C) Second order HPF (D) None of the above

555 timer basically consists of
(A) one comparator (B) two comparators
(C) three comparators (D) four comparators

The output voltage of phase detector is
(A) 10956 voltage (B) അം running voltage
(6) _ error voltage (D) 11016 of the mentioned

In a non-linear op-amp circuit, the
(A) op-amp never saturates
(B) feedback loop is never opened
(C) output shape is the same as the input shape
(2) op-amp may saturate

A Schmitt trigger has feedback.
(A) _ positive (B) negative
(C) compensating capacitors (>) एणा] up resistors
In the locked state of PLL, the phase error between the input & output is ⋅

(൧) maximum (B) moderate
(C) minimum (D) All ofthe above
For an integrating circuit to be effective, the RC product should be the time period
of the input wave.
(A) 5 times greater than (B) 5 times smaller than
(C) equal to (D) atleast 10 times greater than
3. 00௫௫ 9. | 004202

[P.T.O.]