Electronic Circuits II Lecture Notes - Charles Edition

Electronic Circuits II Premium Lecture Notes by Charles Michael John, Specially for ECE Candidates. Syllabus Covered based on Anna University R2008 Regulation.

• 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

• UNIT-II
• 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

• UNIT-III
• 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

• UNIT-IV
• 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

• UNIT-V
• 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