Topics Covered

Feedback amplifiers: classification, feedback concept, effect of feedback on transfer gain, amplifier characteristics, types of feedback, negative feedback amplifiers and their applications. Sinusoidal oscillators: conditions of self-oscillation; phase shift resonant circuit; Colpitts and Hartley oscillator, Wein bridge and crystal oscillators. Operational amplifiers (OP-AMP): Introduction to OP-AMPs, Inverting and Non-inverting amplifier, phase inverter, scale changer, integrating and differentiating circuits, adder or summing amplifier, voltage to current and current to voltage converter, voltage follower, analog electronic computation, differential, instrumentation and bridge amplifiers. AC performance of OP-AMPs: Bandwidth, slew rate, noise and frequency compensation, active filters. Un-tuned power amplifiers: Class A, Class B, Push-pull and Darlington pair amplifiers. Tuned voltage (R.F. and I.F.) and power (Class B, Class C) amplifiers. Modulation: Amplitude Modulation (AM) and Demodulation, Frequency Modulation (FM) and demodulation.