Electronic Circuits II Premium Lecture Notes by Charles Michael John, Specially for ECE Candidates. Syllabus Covered based on Anna University R2008 Regulation.
Content :
UNIT-I
FEEDBACK AMPLIFIER
- Feedback
- Types
- 1. Positive feedback (or) regenerative feedback
- 2. Negative feedback (or) degenerative feedback
- Effect of negative feedback
- 1. Sensitivity of gain
- 2. Desensitivity of gain
- 3. Cut-off frequency
- 4. Distortion
- 5. Noise
- 6. Input impedance
- 7. Output impedance
- Types of negative feedback connection
- a. Voltage series feedback connection
- b. Voltage shunt feedback connection
- c. Current series feedback connection
- d. Current shunt feedback connection
- Equivalent circuit
- Block diagram
- Transfer ratio (Av)
- Input resistance
- Output resistance
- Method of identifying feedback topology and feedback factor
OSCILLATOR
- Colpitt’s oscillators
- Clap oscillator
- Advantages
- Franklin oscillators
- Armstrong oscillators
- Tuned collectors oscillators
- Problems
- RC oscillators
- i. RC phase shift oscillators
- ii. Wein bridge
- iii. Twin-T oscillators
- Piezo electric effect
- Quartz crystal construction
- X – Cut
- Y - Cut
- Symbol of crystal and equivalent circuit
- Frequency response curve
- Crystal oscillators
- Miller crystal oscillators
- i. Serial resonant frequency
- ii. Parallel resonant frequency
- Pierce crystal oscillators
- Application
- LC- oscillator
- Frequency stability of oscillation
TUNED AMPLIFIER
- Introduction
- Types of tuning amplifier
- 1. Small signal tuned amplifier
- 2. Large signal tuned amplifier
- Q-factor
- Q-factor of capacitors
- Loaded and unloaded Q
- Types of coil losses
- 1. Copper loss
- 2. Eddy current loss
- 3. Hysteresis loss
- Parametric diagram for transistor
- Classification
- i. Single tuned amplifier
- ii. Double tuned amplifier
- iii. Stagger tuned amplifier
- Effective quality factor
- Response of single tuned amplifier
- Problems
- Conduction angle
- Efficiency of class c amplifier
- Neutralization
- Types
- 1. Hazeltine neutralization
- 2. Neutrodyne
- 3. Neutralization ring coil
- 4. Rice neutralization
- Double tuned amplifier
- Stability
WAVERHAPING AND MULTIVIBRATOR CIRCUITS
- RC circuit
- 1. High pass
- 2. Low pass
- Ramp input waveform
- Pulse waveform
- Square wave form
- RL circuits
- a. High pass RL network
- b. Low pass RL network
- Integrator and differentiator
- Integrator RC
- Rise time
- Duty cycle
- Turn on time
- Fall time
- Turn off time
- Wave shaping
- Clipper clamper
- i. Positive clipper
- ii. Negative clipper
- Biased negative clipper
- Biased negative clipper with neverse polarisg
- Combinational clipper
- Two level slicer
- Clamper
- 1. Positive clamper
- 2. Negative clamper
- Application
- Multivibrator
- Classification
- 1. Astable multivibrator
- 2. Monostable multivibrator
- 3. Bistable multivibrator
- Collector coupled astable multivibrator
- Modified astable multivibrator
- Emitter coupled astable multivibrator
- Application
- Triggering method for bistable multivibrator
- 1. Unsymmetrical
- 2. Symmetrical
- 3. Application of Schmitt trigger
BLOCKING OSCILLATOR AND TIME BASE GENERATOR
- 1. UJT relaxation oscillator
- 2. Pulse transformer
- Characteristics
- Coupling coefficient
- Transformer ratio
- Application of pulse transformer
- Blocking oscillator
- Astable blocking oscillator
- Magnetizing current
- Advantages
- Disadvantages
- Push-pull astable blocking oscillator
- Voltage across R1 and C1
- Frequency control using core saturation
- Trigger blocking oscillator
- Monostable blocking oscillator with emitter timing
- Current waveform and voltage waveform
- Application of blocking oscillator
- 1. Voltage time base circuit
- a. Miller integration
- b. Boot strap
- 2. Current time base generation
- problems
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