Draw simplified internal block diagram of 555 Timer IC.
[3 marks]Draw and explain typical connection diagram of 78XX series voltage regulator. Also explain drop out voltage.
[4 marks]Derive the expression for the CE short-circuit current gain Aas a function of i frequency.
[7 marks]Define followings: (i) Input offset voltage (ii) CMRR (iii) PSRR.
[3 marks]For Hybrid-π transistor model g = 50 mA/V, r = 1 K, C = 1 pF, and C = m b’e e c 0.2 pF is given then determine the values of f and f β T.
[4 marks]Explain in detail transistor phase-shift oscillator and also derive expression for the frequency.
[7 marks]Draw Wien-bridge oscillator circuit and obtain its frequency of oscillation.
[7 marks]Draw and explain block diagram of typical OP-AMP.
[3 marks]List out characteristics of ideal OP-AMP.
[4 marks]What is Slew rate? What are its causes? Derive expression for maximum frequency of operation for desired output swing in terms of slew rate?
[7 marks]Draw equivalent circuit of an OP-AMP.
[3 marks]Write a brief note on emitter-coupled Differential Amplifier.
[4 marks]What is instrumentation amplifier? With help of neat diagram explain operation of Three OP-AMP based Instrumentation amplifier.
[7 marks]Briefly explain Inverting Amplifier in open loop mode.
[3 marks]Explain the circuit of voltage to current converter with floating load.
[4 marks]Draw and explain closed-loop differential amplifier with one OP-AMP and derive voltage gain equation.
[7 marks]Briefly explain operation of basic differentiator circuit.
[3 marks]Draw and explain OP-AMP based Voltage-shunt feedback amplifier. Derive closed-loop voltage gain equation for the same.
[4 marks]Explain in detail inverting Schmitt trigger circuit.
[7 marks]Briefly explain Peaking Amplifier.
[3 marks]With reference to filter design define following terms:
[4 marks]Pass band (ii) Stop band (iii) Attenuation (iv) Cut-off frequency
[ marks]Show how Biquad circuit can be used as a universal filter?1
[7 marks]Draw and explain briefly Zero crossing detector circuit.
[3 marks]Design a first order low-pass filter for the following specifications:
[4 marks]Passband voltage gain = 2 (ii) Cut-off frequency f = 10 Khz. c
[ marks]With help of circuit diagram, explain operation of first order Butterworth low- pass filter.
