Q. Whenever a JFET operates above pinch-off voltage

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Q. A Weinbridge oscillator is a

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

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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

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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?

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Q. The maximum theoretical efficiency for class A amplifier is

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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

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Q. The parameter β of a BJT change by 300%. If self bias is used in the amplifier using this BJT, the quiescent value of IC and VCE remain almost the same.

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Q. A bypass capacitor produces

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Q. Rise time in a transistor is change from

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Q. In a JFET, gates are always

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Q. By connecting external resistances to a differential amplifier we can adjust

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Q. A feedback network to be used with an amplifier to provide oscillation is tested and found to give an output of 0.124 V with a 0.5 V input. What must be the minimum gain of the oscillator to provide oscillations?

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Q. CMRR is the ratio of differential voltage gain to common mode gain.

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Q. The purpose of impedance matching in an amplifier circuit is to achieve

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Q. In a BJT CE amplifier circuit the value of coupling capacitor should be such that

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Q. In order to rectify sinusoidal signals of millivolt range (< 0.6 V)

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Q. The common gate amplifier has a characteristically __________ input resistance and a __________ output resistance.

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Q. For input and later stages, BI-FET op-amp use

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Q. The emitter coupled pair of BJT's gives a linear transfer relation between the differential output voltage and the differential input voltage Vid only when the magnitude of Vid is less a times the thermal voltage, where α is

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