Analog and Digital Electronics
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(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary
(i) Neat saturation region
(ii) Neat cut-off region
(iii) At the centre of active region
In the common collector shown in fig. Q4 (b), the trasistor parameters are hic=1.2 k, hfc=-101, hrc=1 and hcc=25 μA/v. Calculate Ri, Ai, Av and Ro for the circuit.
Fig. Q8(b) shows dual input, balanced output and differential amplifier configuration. Assuming silica transistor with hie=2.8 KΩ calculate; (i) Operating point valves ; (ii) Differential gain; (ii) Common mode gain; (iv) CMRR; (v) Output if Vs1 =70 mV peak to peak at 1 kHz; vi) Vs2=40 mV peak to peak at 1 kHz.