The action of JFET in its equivalent circuit can best be represented as a
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Analog Electronics
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In a CB amplifier the maximum efficiency could be
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In a p+n junction diode under reverse bias, the magnitude of electric field is maximum at
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To prevent a DC return between source and load, it is necessary to use
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A constant current signal across a parallel RLC circuits gives an output of 1.4v at the signal frequency of 3.89KHZ and 4.1KHZ. At the frequency of 4KHZ, the output voltage will be
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If = 0.98, and for a transistor, then the value of will be
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Which of the following is not associated with a p-n junction
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The cascade amplifier is a multistage configuration of
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An npn BJT has gm = 38 mA/v, Cµ = 10-14 F, Cπ = 4 × 10-13 F and DC current gain β0 = 90. For this transistor fT & fβ are
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Negative feedback in an amplifier
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An amplifier without feedback has a voltage gain of 50, input resistance of 1 kΩ & Output resistance of 2.5 kΩ.The input resistance of the current shunt negative feedback amplifier using the above amplifier with a feedback factor of 0.2 is
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The most commonly used amplifier in sample & hold circuits is
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An n-channel JFET has and Vp = -4 v. Its transconductance gm = in (mA/V) for an applied gate to source voltage VGS = -2 v is
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In a common emitter, unbypassed resister provides
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The current gain of a BJT is
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The current gain of a bipolar transistor drops at high frequencies because of
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Generally, the gain of a transistor amplifier falls at high frequencies due to the
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An amplifier using an opamp with slew rate SR=1v/µsec has a gain of 40db.if this amplifier has to faithfully amplify sinusoidal signals from dc to 20 KHz without introducing any slew-rate induced distortion, then the input signal level must not exceed
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Voltage Series (feedback also called series-shunt feedback) results in
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MOSFET can be used as a
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