Syllabus :
UNIT 1Â Â Â Â Â Â Â Â Â Â FEEDBACK AMPLIFIERS Â
Block diagram, Loop gain, Gain with feedback, Effects of negative feedback â€" Sensitivity and desensitivity of gain, Cut-off frequencies, distortion, noise, input impedance and output impedance with feedback, Four types of negative feedback connections â€" voltage series feedback, voltage shunt feedback, current series feedback and current shunt feedback, Method of identifying feedback topology and feedback factor, Nyquist criterion for stability of feedback amplifiers.
UNIT IIÂ Â Â Â Â Â Â Â Â Â OSCILLATORS Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
Classification, Barkhausen Criterion - Mechanism for start of oscillation and stabilization of amplitude, General form of an Oscillator, Analysis of LC oscillators - Hartley, Colpitts, Clapp, Franklin, Armstrong, Tuned collector oscillators, RC oscillators - phase shift â€" Wienbridge - Twin-T Oscillators, Frequency range of RC and LC Oscillators, Quartz Crystal Construction, Electrical equivalent circuit of Crystal, Miller and Pierce Crystal oscillators, frequency stability of oscillators.
UNIT III Â Â Â Â TUNED AMPLIFIERS Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
Coil losses, unloaded and loaded Q of tank circuits, small signal tuned amplifiers - Analysis of capacitor coupled single tuned amplifier â€" double tuned amplifier - effect of cascading single tuned and double tuned amplifiers on bandwidth â€" Stagger tuned amplifiers â€" large signal tuned amplifiers â€" Class C tuned amplifier â€" Efficiency and applications of Class C tuned amplifier - Stability of tuned amplifiers â€" Neutralization - Hazeltine neutralization method.
UNIT IVÂ Â Â Â Â Â Â Â Â WAVE SHAPING AND MULTIVIBRATOR CIRCUITS Â
RC & RL Integrator and Differentiator circuits â€" Storage, Delay and Calculation of Transistor Switching Times â€" Speed-up Capaitor - Diode clippers, Diode comparator - Clampers. Collector coupled and Emitter coupled Astable multivibrator - Monostable multivibrator - Bistable multivibrators - Triggering methods for Bistable multivibrators - Schmitt trigger circuit.
UNIT VÂ Â Â Â Â Â Â Â Â Â BLOCKING OSCILLATORS AND TIMEBASE GENERATORS Â Â
UJT sawtooth waveform generator, Pulse transformers â€" equivalent circuit â€" response - applications, Blocking Oscillator â€" Free running blocking oscillator - Astable Blocking Oscillators with base timing â€" Push-pull Astable blocking oscillator with emitter timing, Frequency control using core saturation, Triggered blocking oscillator â€" Monostable blocking oscillator with base timing â€" Monostable blocking oscillator with emitter timing, Time base circuits - Voltage-Time base circuit, Current-Time base circuit - Linearization through adjustment of driving waveform.
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