A three stage amplifier with identical stages with lower cut off frequency per stage ‘f1’ is given overall negative feedback. Depending on the overall gain, the system may oscillate at a low frequency fcgiven by
Consider the feedback circuit shown in figure.
The feedback network used in the circuit has …………………… type of feedback topology.
A class B push pull amplifier must deliver low of audio power to the output load. If the output transformer is 80% efficient then what is the minimum average dissipation rating required for each transistor ?
Consider an amplifier circuit shown in figure. If the transistors θ1 and θ2 parameters gm1, rπ1 and gm2, rπ2 respectively then voltage gain |Av| is
For the Darlington amplifier shown in figure below as :
Both Q1 and Q2 are identical with h parameter hfc = 100, RE = hie = 1 kΩ. If z parameter of the circuit diagram is given as
For the following given circuit, find the small signal voltage gain for β = 80 & VA = ∞ and VT = 26 mV.