190. The flat-top response of the pulse transformer is nothing out
A. its high frequency response
B. its low frequency response
C. its frequency response
D. none of these

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191. Rise time response of a pulse transformer is nothing but its
A. low frequency response
B. high frequency response
C. frequency response
D. none of these

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192. A pulse transformer is to be designed to handle 1 is wide pulses. The source resistance from which it is fed is about 1 k.G. To minimize both percentage tilt and backswing, the magnetizing inductance should be of the order of
A. 1 mH
B. 50 mH
C. 100 pH
D. 10 pH

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193.  In pulse-transformers, it is always desirable to use
A. a low permeability core material
B. an air core
C. a high permeability core material
D. none of these

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194. A differential amplifier has a differential gain of 20,000. CMRR = 80 dB. The common mode gain is gain by
A.2
B.1
C. 1/2
D.0

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195.  Op-amp used as a tuned amplifier has the tuned circuit connected
A. across input
B. across series impedance at the input
C. across feedback impedance Zf
D. across output

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196. The output voltage of an OPAM of input voltage of Vil = 150 ftV, Vi2 = 140 pV if the amplifier has a differential gain of Ad = 4000 and the value of CMRR is 100, is
A.45.8 mV
B.40.006 mV
C. 10 ftV
D. 145 ptV

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