Ec ii syllabus highlighted
- 1. EC6401 ELECTRONIC CIRCUITS II UNIT I FEEDBACK AMPLIFIERS General Feedback Structure – Properties of negative feedback – Basic Feedback Topologies – Feedback amplifiers (block diagram, classification) – Series – Shunt, Series – Series (*current series feedback, Av, Rif, Ri, Ro), Shunt – Shunt (voltage shunt, Rif) and Shunt – Series (voltage series feedback, Av, Avf) Feedback / Determining the Loop Gain – Stability Problem – Nyquist Plot – Effect of feedback on amplifier poles – Frequency Compensation. Problems: **identify feedback topology from figure / 3 pole feedback amplifiers find freq. of dominant pole/ *loop gain function T(f) / Avf=100 find A and β. UNIT II OSCILLATORS 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 –*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. Problems: **colpitts, clapp UNIT III TUNED AMPLIFIERS Coil losses, unloaded and loaded Q of tank circuits/ small signal tuned amplifiers - *Analysis of capacitor coupled single tuned amplifier – double tuned amplifier - effect of cascading single tuned and double tuned amplifiers on bandwidth / *Stagger tuned amplifiers / large signal tuned amplifiers – *Class C tuned amplifier – Efficiency and applications of Class C tuned amplifier / Stability of tuned amplifiers – **Neutralization – Hazeltine neutralization method. Problems: calculate loaded and unloaded Q for single tuned / design tuned amplifier / design of IF amplifier UNIT IV WAVE SHAPING AND MULTIVIBRATOR CIRCUITS RC & RL Integrator and Differentiator circuits/ Storage, Delay and Calculation of Transistor Switching Times / Speed-up Capacitor / Diode clippers, Diode comparator - Clampers/ Collector coupled and Emitter coupled Astable multivibrator – Monostable multivibrator - Bistable multivibrators - Triggering methods for Bistable multivibrators / *Schmitt trigger circuit. Problems: **collector coupled monostable multivibrator / astable / In inductor find Rs and Rp / Schmitt trigger UNIT V BLOCKING OSCILLATORS AND TIMEBASE GENERATORS **UJT saw tooth waveform generator/ Pulse transformers – equivalent circuit – response – applications/ Blocking Oscillator – Free running blocking oscillator - *Astable Blocking Oscillators with base timing – Push- pull Astable blocking oscillator with emitter timing/ Frequency control using core saturation/ Triggered blocking oscillator – Monostable blocking oscillator with base timing – Monostable blocking oscillator with emitter timing/ Time base circuits (three errors)- Voltage-Time base circuit, **Current-Time base circuit/ Linearization through adjustment of driving waveform. Problems: UJT 2 mark