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The gain of an r-c coupled amplifier falls at high frequency because the capacitive reactance of the capacitor tends to zero.
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∙ 12y ago
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Frequency response curve of RC coupled amplifier?
at low frequency less than 50hz the voltage gain decreases with decreasing frequency and at mid frequency{50hz to 20khz} the voltage gain is uniform because resistor value are independent of frequency change and at the high frequency votage gain falls.
What is gain roll off?
A: As frequency increases all amplifier exhibits losses due to internal capacity or internal devices frequency limit. At the hi end of the frequency the amplifiers begins to loose gain gradually as a function of higher frequency that is what roll off is.
Who is more gain amplifier cascaded amplifier or darlington amplifier?
Darlington amplifier has more gain when compared to cascade amplifier .
Why neutralisation is used in tuned amplifier?
neutralization is one of the methods to make the amplifier unilateral i.e. to remove internal feedback of the amplifier. It is done to obtain the maximum gain from an amplifier.
Need of multistage amplifier?
The Gain provided by the multistage amplifier is greater than the gain of single stage amplifier. The gain of the two stage amplifier is the product of the gain of the individual stages.
Frequency response curve of RC coupled amplifier?
at low frequency less than 50hz the voltage gain decreases with decreasing frequency and at mid frequency{50hz to 20khz} the voltage gain is uniform because resistor value are independent of frequency change and at the high frequency votage gain falls.
What is the low frequency gain in operational amplifier?
low frequency gain will be 20log(Vo/Vin)
Working of Rc coupled amplifier using negative feedback?
As gain increases bandwidth decreases.
The gain of an operational amplifier will be maximum?
A: the gain will be maximum at the open loop configuration and decrease as frequency increases
High frequency response of RC coupled amplifier?
At high frequency the capacitor coupling the stages has low reactance, therefore the net resistance of that stage is not equal to next stage, due to this poor impedance matching the power of this stage is not transferred fully to next stage and hence gain falls. And also at high frequency transistor capacitance comes into existence which provides feedback and it thus lowers gain.
What is the effect on voltage gain in a common emitter amplifier when the decoupling capacitor is removed?
The emitter bypass capacitor, in a typical common emitter configuration, increases gain as a function of frequency, making a high pass filter. Removing the capacitor will remove the gain component due to frequency, and the amplifier will degrade to its DC characteristics.
What is gain roll off?
A: As frequency increases all amplifier exhibits losses due to internal capacity or internal devices frequency limit. At the hi end of the frequency the amplifiers begins to loose gain gradually as a function of higher frequency that is what roll off is.
State the application of RC coupled amplifier?
To increase the power gain ,high input impedance,low output impedance,and increase the weaken signal
Who is more gain amplifier cascaded amplifier or darlington amplifier?
Darlington amplifier has more gain when compared to cascade amplifier .
Why neutralisation is used in tuned amplifier?
neutralization is one of the methods to make the amplifier unilateral i.e. to remove internal feedback of the amplifier. It is done to obtain the maximum gain from an amplifier.
What are the applications of Class B Power Amplifier?
Its used in collector amplitude modulation,Radio frequency recievers ..etc
When the closed loop gain of op amp is unity?
A: As frequency increases the performance of the amplifier decreases to point where because of its internal make it reaches no gain or unity gain. Or it can be unity gain as designed like for a signal buffer
