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Q. Explain the classification of amplifiers on the biasing conditions?
Based on the amount of transistor bias and amplitude of the input signal, amplifiers can be classified as class A , class B, class B and class c.
CLASS A AMPLIFIER: In a class A amplifier, the transistor is biased such that the output current flows, i.e. the transistor is on for the full cycle (360) of the input a.c. signal.
CLASS B AMPLIFIER: In the class B amplifier the transistor bias and the amplitude of the input signal are selected such that the output current flows ,i.e. the transistor is ON for less than one half cycle (180) of the input a.c. signal .
CLASS C AMPLIFIER: In a class c amplifier the transistor bias and the amplitude of the input signal are selected such that the output current flows i.e. the transistor is ON for less than one half cycle (180) of the input a.c. signal.
Determine the change in IC from 25ºC to 175ºC for the transistor defined in this table for fixed-bias with RB = 240 k and = 100 due to the S(VBE) stability factor.
Q. In the non inverting summing amplifier of Figure, let R d = 1k and M = 6. Find R f so that v =
If a current of 20A flows for five minutes, find the quantity of electricity transferred. Quantity of electricity, Q = It = 20 x 5 x 60 = 6000C
How is bias compensation in transistor is done using thermistors and sensistor
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ammeter, voltmeter, wattmeter
Q. What is Output Impedance? Output Impedance : The output impedance of an amplifier is a measure of the impedance or resistance. It has nothing to do with the actual loading t
Define Time-Shifting Precedes Time-Reversing and Vice Versa Signal x[n] is time-shifted by m samples (delay in time) giving x[n - m]. This signal is then reversed at n = 0 givi
Q. Explain working of Inverting Summing Amplifier? The circuit of Figure is extended by adding other input points, as shown in Figure. Because of the virtual ground at terminal
dc to ac converter by IBGT
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