Q. A semi-conductor device that behaves like two SCRs is

View solution

Q. As compared to a BJT amplifier circuit, a JFET amplifier circuit

View solution

Q. In an oscillator the total phase shift around the loop must be

View solution

Q. The enhancement type MOSFET is called a

View solution

Q. The input gate current of a FET is

View solution

Q. For maximum unclipped output from a CE amplifier, the Q point should be

View solution

Q. Which of the following best represents the input impedance of an actual op-amp?

View solution

Q. If three cascaded stages of amplifier have gains 10, 20 and 30 the overall voltage will be

View solution

Q. A collector collects

View solution

Q. In a resistance loaded, RC coupled amplifier the d.c. component is blocked by

View solution

Q. A logarithmic amplifier has diode in the feedback path.

View solution

Q. The input resistance of FET in the low frequency small signal operation is

View solution

Q. Which of the following parameters of CE circuit has the unit of ohms?

View solution

Q. Whenever a JFET operates above pinch-off voltage

View solution

Q. A Weinbridge oscillator is a

View solution

Q. CMRR of an op-amp is about 0.1.

View solution

Q. A transistor amplifier has poles at

s1 = - 0.000245 x 10⁹ rad/sec.
s2 = - 0.0748 x 10⁹ rad/sec.
s3 = - 0.670 x 10⁹ rad/sec.
s4 = - 4.38 x 10⁹ rad/sec.

The upper 3 dB frequency of the amplifier will be

View solution

Q. An engineer designs an amplifier to have a voltage gain of 60, but when constructed it only had a gain of 50. What value of feedback will double the gain?

View solution

Q. The maximum theoretical efficiency for class A amplifier is

View solution

Q. Assertion (A): A class C amplifier can also be used as frequency multiplier

Reason (R): When narrow current pulses drive a resonant circuit the output can be a near perfect sine wave

View solution