Circuit and Network Formulas
Revise KCL, KVL, Thevenin, Norton, AC circuits, resonance, transient response, and two-port parameters.
Formula Revision
ECE Formula Sheet
A formula-first revision page for ECE students who want fast subject-wise recall before solving GATE ECE, BEL, ISRO, DRDO, PSU, PYQ, and MCQ questions.
Formulas
Intent
Revision
Use
GATE ECE
Exam
Signals, Control, and Communication
Move through Fourier, Laplace, Z-transform, time response, stability, modulation, noise, and information theory formulas.
Device and Digital Formulas
Keep diode, BJT, MOSFET, op-amp, Boolean algebra, counters, ADC, DAC, and logic-family formulas close to PYQ practice.
Fast Study Links
Subject-Wise Formula Revision
Use these formula clusters with the linked notes before attempting PYQs or timed MCQs.
Network Theory
Best before circuit numericals, network theorems, AC analysis, transients, and two-port questions.
- KCL and KVL
- Thevenin, Norton, superposition, and maximum power transfer
- Impedance, resonance, time constants, and two-port parameters
Signals and Systems
Use before convolution, transform, sampling, and LTI-system PYQs.
- Convolution and impulse response
- Fourier series, Fourier transform, Laplace transform, and Z-transform
- Sampling theorem, ROC, causality, and stability conditions
Control Systems
Use before stability, time-response, root-locus, Bode, and compensator questions.
- Transfer function and block-diagram reduction
- Routh-Hurwitz, root locus, gain margin, and phase margin
- First-order and second-order time-response relations
Communication Systems
Use before analog communication, digital communication, noise, and information theory questions.
- AM, FM, PM, modulation index, bandwidth, and power relations
- PCM, line coding, ASK, FSK, PSK, QPSK, and QAM basics
- SNR, noise figure, entropy, information rate, and channel capacity
Analog and Electronic Devices
Use before diode, BJT, MOSFET, op-amp, filters, oscillators, and power-supply numericals.
- Diode and rectifier relations
- BJT, MOSFET, amplifier gain, feedback, and op-amp formulas
- Cutoff frequency, filters, oscillators, and regulator power
Digital Electronics and DSP
Use before Boolean algebra, counters, converters, transforms, DFT, FFT, and filter questions.
- Boolean identities, K-map forms, flip-flops, counters, and registers
- ADC and DAC resolution, quantization, and code relations
- DFT, FFT, Z-transform, FIR, IIR, and sampling relations
Notes-Wise ECE Revision
Network Analysis
Network Analysis notes for circuit laws, KCL, KVL, theorems, AC/DC analysis, two-port networks, graph theory, and filters.
Analog Electronics
Analog Electronics notes for diodes, BJTs, MOSFETs, amplifiers, op-amps, filters, oscillators, and waveform generators.
Digital Electronics
Digital Electronics notes for logic gates, Boolean algebra, K-maps, combinational and sequential circuits, flip-flops, counters, and registers.
Signals and Systems
Continuous and discrete signals, LTI systems, convolution, Fourier series, and Laplace transform.
Communication Systems
AM, FM, PM, digital modulation, noise, bandwidth, sampling theorem, and information theory.
Electromagnetic Theory
Maxwell's equations, wave equation, EM waves, boundary conditions, and transmission lines.