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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Q. In most transistor the collector region is made physically larger than the emitter region

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Q. The leakage current in CB configuration may be around

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Q. In a CE amplifier the Q point is very close to saturation point on the dc load line. This results in

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Q. Class-B amplifier has less efficiency compared to

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Q. Calculate the O/P voltage of a non-inverting constant gain multiplier with R1 = 100 kΩ, Rf= 600 kΩ, V1 = 2 volt, then O/P voltage Vo of non inverting op-amp is given by

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