The early effect in a bipolar junction transistor is caused by
The early effect in a bipolar junction transistor is caused by
A 741-type OP-amp has a gain-bandwidth product of 1MHz.A non-inverting amplifier using this opamp & having a voltage gain of 20db will exhibit -3db bandwidth of
A 741-type OP-amp has a gain-bandwidth product of 1MHz.A non-inverting amplifier using this opamp & having a voltage gain of 20db will exhibit -3db bandwidth of
In deriving ac equivalent circuit for an amplifier circuit we short circuit
In deriving ac equivalent circuit for an amplifier circuit we short circuit
When a transistor is connected in common emitter mode, it with have
When a transistor is connected in common emitter mode, it with have
The encapsulation of transistor is necessary for
The encapsulation of transistor is necessary for
In a transistor leakage current mainly depends on
In a transistor leakage current mainly depends on
In a common emitter, unbypassed resister provides
In a common emitter, unbypassed resister provides
The cascade amplifier is a multistage configuration of
The cascade amplifier is a multistage configuration of
In all base driver amplifiers
In all base driver amplifiers
Negative feedback in an amplifier
Negative feedback in an amplifier
To prevent a DC return between source and load, it is necessary to use
To prevent a DC return between source and load, it is necessary to use
A change in the value of the emitter resistance Re in a differential amplifier
A change in the value of the emitter resistance Re in a differential amplifier
MOSFET can be used as a
MOSFET can be used as a
The current gain of a bipolar transistor drops at high frequencies because of
The current gain of a bipolar transistor drops at high frequencies because of
Three identical amplifiers with each one having a voltage gain of 50,input resistance of 1KΩ & output resistance of 250, are cascaded. The open circuit voltage gain of combined amplifier is
Three identical amplifiers with each one having a voltage gain of 50,input resistance of 1KΩ & output resistance of 250, are cascaded. The open circuit voltage gain of combined amplifier is
If=0.98, Ico=6µA and Iβ=100µA for a transistor,then the value of Ic will be
If=0.98, Ico=6µA and Iβ=100µA for a transistor,then the value of Ic will be
A dc power supply has no-load voltage of 30v,and a full-load voltage of 25v at full-load current of 1A.Its output resistance & load regulation ,respectively are
A dc power supply has no-load voltage of 30v,and a full-load voltage of 25v at full-load current of 1A.Its output resistance & load regulation ,respectively are
Introducing a resistor in the emitter of a common amplifier stabilizes the dc operating point against variations in
Introducing a resistor in the emitter of a common amplifier stabilizes the dc operating point against variations in
The bandwidth of an RF tuned amplifier is dependent on
The bandwidth of an RF tuned amplifier is dependent on
Which of the following amplifier circuit using junction transistor has the best gain?
Which of the following amplifier circuit using junction transistor has the best gain?
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
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
An amplifier without feedback has a voltage gain of 50,input resistance os 1 KΩ & Output resistance of 2.5KΩ.The input resistance of the current shunt negative feedback amplifier using the above amplifier with a feedbacik factor of 0.2 is
An amplifier without feedback has a voltage gain of 50,input resistance os 1 KΩ & Output resistance of 2.5KΩ.The input resistance of the current shunt negative feedback amplifier using the above amplifier with a feedbacik factor of 0.2 is
Which of the following statements is false?
Which of the following statements is false?
The horizontal intercept of dc load line is the same as ideal
The horizontal intercept of dc load line is the same as ideal
The current gain of a BJT is
The current gain of a BJT is
Most of the linear ICs are based on the two-transistor differential amplifier because of its
Most of the linear ICs are based on the two-transistor differential amplifier because of its
An npn BJT has gm=38mA/v, cµ =10¯14 F, cπ =10¯13F and DC current gain β0=90.For this transistor fT & fβ are
An npn BJT has gm=38mA/v, cµ =10¯14 F, cπ =10¯13F and DC current gain β0=90.For this transistor fT & fβ are
The action of JFET in its equivalent circuit can best be represented as a
The action of JFET in its equivalent circuit can best be represented as a
A constant current signal across a parallel RLC circuits gives an o/p of 1.4v at the signal frequency of 3.89KHZ and 4.1KHZ. At the frequency of 4KHZ,the o/p voltage will be
A constant current signal across a parallel RLC circuits gives an o/p of 1.4v at the signal frequency of 3.89KHZ and 4.1KHZ. At the frequency of 4KHZ,the o/p voltage will be
A differential amplifier is invariably used in the i/p stage of all OP-amps.This is dome basically to provide the OP-amps with a very high
A differential amplifier is invariably used in the i/p stage of all OP-amps.This is dome basically to provide the OP-amps with a very high
In a CB amplifier the maximum efficiency could be
In a CB amplifier the maximum efficiency could be
Voltage Series (feedback also called series-shunt feedback) results in
Voltage Series (feedback also called series-shunt feedback) results in
Class AB operation is often used in power large signal) amplifiers in order to
Class AB operation is often used in power large signal) amplifiers in order to
An n- channel JFET has IDSS=2mA,and Vp=-4v.Its transconductance gm=in mA/V)for an applied gate to source voltage VGS=-2v is
An n- channel JFET has IDSS=2mA,and Vp=-4v.Its transconductance gm=in mA/V)for an applied gate to source voltage VGS=-2v is
In an OP-amp differentiator
In an OP-amp differentiator
Asource follower using an FET usually has a voltage gain which is
Asource follower using an FET usually has a voltage gain which is
The MOSFET switch in its onstate may be considered equivalent to
The MOSFET switch in its onstate may be considered equivalent to
Which of the following is not associated with a p-n junction
Which of the following is not associated with a p-n junction
The effective channel length of a MOSFET in a saturation decreases with increase in
The effective channel length of a MOSFET in a saturation decreases with increase in
The most commonly used amplifier in sample & hold circuits is
The most commonly used amplifier in sample & hold circuits is
Generally, the gain of a transistor amplifier falls at high frequencies due to the
Generally, the gain of a transistor amplifier falls at high frequencies due to the
In a p⁺n junction diode under reverse bias , the magnitude of electric field is maximum at
In a p⁺n junction diode under reverse bias , the magnitude of electric field is maximum at
Thermal runaway is not possible in FET because as the temperature of FET increases
Thermal runaway is not possible in FET because as the temperature of FET increases
