68052. High cut off frequency can be expected in case of
68053. Which coupling produces the minimum interference with frequency response?
68054. Assertion (A): A sine wave with slew rate distortion looks rectangularReason (R): The maximum rate of output voltage change is called slew rate
68055. In a P-N-P transistor, electrons flow
68056. A generator with an internal resistance of 600 Ω drives an amplifier whose input resistance is 400 Ω. The generator's open circuit voltages is 1 mV; the amplifier develops 100mV across an 8kΩ load. The input voltage to the amplifier is
68057. Thermal run away of a transistor occurs when
68058. JFET has __________ degree of isolation between input and output, and a __________ noise figure.
68059. The advantage of FET over BJT is
68060. The MOSFET is almost ideal as a switching device because
68061. The input and output signals for CE amplifier are always
68062. The voltage gains of an amplifier without feedback and with negative feedback respectively are 100 and 20. The percentage of negative feedback (β) would be
68063. Figure shows a
68064. Three cascaded stages have gains of 10, 20 and 25. The overall gain will be
68065. Find the odd one out
68066. The equivalent circuit shown in figure is for
68067. In a one pole active low pass filter, the cut off frequency is fc. Then
68068. Turn off time of a transistor switch is equal to (where ts is storage time and tf is fall time.)
68069. In a CE amplifier circuit the emitter by pass capacitor is remove. The ac output voltage
68070. In a differential amplifier, CMRR can be improved by using an increased
68071. If ac resistance of diode is re, then In CE, BJT amplifier the input impedance is
68072. Pick the odd-one out
68073. In a CE amplifier the output coupling capacitor is short circuited. The dc collector voltage
68074. A certain transistor has a dc of 0.98 and a collectors leakage current of 5 μA. If IE = 1 mA, the collector current will be
68075. If 1.5% of the output of an amplifier is feedback positively to the input, the minimum gain required of the amplifier for oscillations to occur, is
68076. The use of a capacitor filter in a rectifier circuit gives satisfactory performance only when the load
68077. The transconductance curve of a JFET is
68078. The input resistance R, of an ideal voltage amplifier is __________ and that of a current amplifier is __________ .
68079. In CE amplifier circuit, voltage gain is directly proportional to
68080. The heat sink disposes off heat mainly by
68081. A major advantage of TWT over a Klystron lies in its
68082. When narrow current pulses drive a high Q resonant circuit the voltage across the circuit looks like
68083. The multivibrator circuit that has a typical application of converting sinusoidal input into a square wave output is
68084. Symbol shown in figure represents a
68085. The feedback resistance rd in small signal model of MOSFET is of the order of
68086. Which amplifier has a voltage gain of less than 1?
68087. A clamper
68088. For holding the drain current constant in spite of large changes in JFET parameters
68089. The main disadvantage of a JFET is
68090. For Q >> 1, the output frequency of LC oscillator is equal to resonant frequency.
68091. At the peak of negative half cycle in figure
68092. IN 3242 is a
68093. Low frequency response of amplifier is mainly limited by
68094. With negative feedback the closed loop gain is always less than open loop gain.
68095. As compared to a bipolar transistor, a JFET is
68096. In a bistable multivibrator, commutating capacitors are used to
68097. Two 3Ω speakers in series will have a total impedance of
68098. The input resistance Ri of the amplifier shown in the figure
68099. In a CE amplifier the ac signal is increased. Which of the following will not change?
68100. The ideal op-amp has the following characteristics
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