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Electronic Devices and Circuits

Use this section in the syllabus order: switching devices → logic/memory → op-amps and conversion → power electronics → amplifiers → oscillators. EDC figures are source-faithful, high-resolution textbook PNGs; generated SVG diagrams were retired because conventional symbols and connections must match the books exactly.

Chapter Route

Block Chapters Exam focus
Switching devices BJT switching · MOSFET switching Cutoff/ON states, load line, switching times, storage charge, gate charge, BJT–MOSFET comparison
Logic families Logic gates · TTL · NMOS/CMOS NAND operation, totem-pole output, Schottky TTL, CMOS current paths, VTC and noise margins
Memory Semiconductor memory Array organization, SRAM/DRAM, PROM/EPROM/EEPROM/Flash comparisons
Op-amps and filters Fundamentals and parameters · Configurations and applications · Analog filters Ideal/practical parameters, closed-loop gains, instrumentation amplifier, Butterworth/Chebyshev and active-filter circuits
Data conversion A/D converters Flash, SAR, dual-slope and sigma-delta architecture, resolution, timing and trade-offs
Digital logic Arithmetic · Selection/parity · Flip-flops · Registers/counters Gate derivations, carry, MUX/DEMUX, JK conversion, timing, state design and counters
Power electronics Thyristors and rectifiers · Supplies and safety · Seven-segment displays SCR regeneration and V-I curve, controlled-rectifier assumptions, SMPS comparison, protection and display drive
Amplifiers Untuned/coupling · CE RC-coupled · Push-pull · Tuned · Feedback · Bode/stability · Differential/cascode Circuit operation, gain/efficiency, distortion, resonance, feedback topology, margins and CMRR
Oscillators Fundamentals · Wien/phase shift · Hartley/Colpitts/Clapp · Resonance · Crystal · PLL Barkhausen conditions, feedback ratio, resonant frequency/Q, crystal modes and lock/capture ranges

Source Map

Book Best use in these notes
Boylestad & Nashelsky — Electronic Devices and Circuit Theory (11th ed.) SCR, power amplifiers, feedback, op-amp applications, active filters, Wien/crystal oscillators and display packages
Sedra/Smith — Microelectronic Circuits (7th ed.) MOSFET operating points, differential/cascode stages, feedback/stability and Class-B/AB transfer behaviour
Floyd — Digital Fundamentals (11th ed.) TTL/CMOS circuits, adders, registers/counters, semiconductor-memory organization and ADC architectures
Maini — Acing the GATE ECE Compact revision diagrams, switching-time definitions and cross-checking exam-level formulas

Exam Workflow

  1. Read the chapter once and identify the command verb: define, explain, derive, compare, draw, or calculate.
  2. Reproduce the 5-mark core closed-book: definition → labelled figure → governing formula with symbols/units → 4–6 scoring points → result/application.
  3. Add distinct 10-mark surfaces: derivation or detailed operation, a second visual/table, assumptions, trade-offs and application.
  4. Use the textbook figure to memorize conventional symbols, topology, polarity and label placement; simplify it by hand only after preserving those technical details.
  5. Verify that labels, polarities, device names and equations match between the figure and prose.