GATE EC Syllabus 2027: Subject-wise Topics and Study Plan
The GATE EC syllabus 2027 is the official list of topics for the Electronics and Communication Engineering paper of GATE 2027, published by IIT Madras as the organising institute. Every EC paper also includes a common General Aptitude section, so your preparation covers two syllabi: General Aptitude and the EC paper itself, which includes Engineering Mathematics.
This page lists every section and topic from the official GATE 2027 EC syllabus, explains where to start, shows how EC overlaps with the EE and IN papers, and ends with a phased plan to finish the syllabus before February 2027. IIT Madras has revised the syllabi for all papers this cycle, so use the 2027 version rather than notes built on an older copy.
Table of Contents
GATE EC Syllabus 2027 at a Glance
Part | What it covers | Marks |
|---|---|---|
General Aptitude | Verbal, quantitative, analytical and spatial aptitude | 15 |
Engineering Mathematics | Linear algebra, calculus, differential equations, vector analysis, complex analysis, probability and statistics | 13 |
EC subject sections | Networks, Signals and Systems; Electronic Devices; Analog Circuits; Digital Circuits; Control Systems; Communications; Electromagnetics | 72 |
Total | 65 questions in 3 hours | 100 |
The official syllabus document lists topics only. It does not give marks for each of the seven subject sections.
Key Changes to Know
Syllabi revised for 2027: IIT Madras has stated that the syllabi for GATE 2027 papers have been revised, the first such revision in about five years. Cross-check your notes against the 2027 EC PDF on the official site.
Computer organisation sits inside Digital Circuits: Machine instructions, addressing modes, ALU, data-path, control unit and instruction pipelining are part of the EC syllabus. Students who prepare only from digital electronics textbooks often miss these topics, so plan them in separately.
No official weightage: Subject-wise weightage tables online are estimates based on past papers. They help with prioritising, but they are not official and they shift from year to year.
General Aptitude includes spatial aptitude: Shape transformations, paper folding and cutting are part of GA. Do not prepare GA with verbal and numerical practice alone.
Older pages may still show a previous version of the syllabus, so follow the official GATE 2027 syllabus document.
General Aptitude Syllabus
General Aptitude is common to every GATE paper and carries 15 marks across 10 questions.
Section | Topics to cover | Start with |
|---|---|---|
Verbal Aptitude | Basic grammar (tenses, articles, adjectives, prepositions, conjunctions, verb-noun agreement, other parts of speech), vocabulary (words, idioms and phrases in context), reading comprehension, narrative sequencing | Grammar rules and sentence completion |
Quantitative Aptitude | Data interpretation (bar graphs, pie charts, 2D and 3D plots, maps, tables), ratios, percentages, powers, exponents, logarithms, permutations and combinations, series, mensuration, geometry, elementary statistics and probability | Percentages, ratios and data interpretation |
Analytical Aptitude | Deduction and induction, analogy, numerical relations and reasoning | Statement-conclusion and analogy sets |
Spatial Aptitude | Translation, rotation, scaling, mirroring, assembling and grouping of shapes; paper folding, cutting and patterns in 2 and 3 dimensions | Paper folding and mirror images |
Engineering Mathematics Syllabus
Engineering Mathematics carries 13 marks and also supports Signals, Control and Communications questions.
Topic | What to cover |
|---|---|
Linear Algebra | Vector space, basis, linear dependence and independence, matrix algebra, eigenvalues and eigenvectors, rank, existence and uniqueness of solutions of linear equations |
Calculus | Mean value theorems, theorems of integral calculus, definite and improper integrals, partial derivatives, maxima and minima, multiple integrals, line, surface and volume integrals, Taylor series |
Differential Equations | Linear differential equations, Euler-Cauchy equation, non-homogeneous equations, variation of parameters, complementary function and particular integral, partial differential equations, variable separable method, initial and boundary value problems |
Vector Analysis | Vectors in plane and space, vector operations, gradient, divergence and curl, Gauss's, Green's and Stokes' theorems |
Complex Analysis | Analytic functions, Cauchy's integral theorem and formula, sequences, series and convergence tests, Taylor and Laurent series, residue theorem |
Probability and Statistics | Mean, median, mode, standard deviation, combinatorial probability, binomial, Poisson, exponential and normal distributions, joint and conditional probability, correlation and regression |
GATE EC Subject Syllabus
The seven subject sections below carry 72 marks together. Topic names follow the official GATE 2027 EC syllabus.
Networks, Signals and Systems
Circuit analysis: Node and mesh analysis, superposition, Thevenin's and Norton's theorems, reciprocity.
Sinusoidal steady state: Phasors, complex power, maximum power transfer.
Time and frequency domain analysis: RL, RC and RLC circuits, network equations using Laplace transform, linear 2-port network parameters, wye-delta transformation.
LTI systems: Definition and properties, causality, stability, impulse response, convolution, poles and zeros, frequency response, group delay and phase delay.
Continuous-time signals: Fourier series and Fourier transform, Nyquist sampling theorem, sampling and reconstruction.
Discrete-time signals: DTFT, DFT, z-transform, FIR and IIR filter design.
Electronic Devices
Semiconductor basics: Formation of energy bands, energy bands in intrinsic and extrinsic semiconductors, equilibrium carrier concentration, direct and indirect band-gap semiconductors.
Carrier transport: Diffusion and drift current, mobility and resistivity, generation and recombination of carriers, Poisson and continuity equations.
Devices: P-N junction, Zener diode, BJT, MOS capacitor, MOSFET and scaling in MOSFETs, LED, photodiode and solar cell.
Analog Circuits
Diode circuits: Clipping, clamping and rectifiers.
BJT and MOSFET amplifiers: Biasing, AC coupling, small signal analysis, frequency response, current mirrors and differential amplifiers.
Op-amp circuits: Amplifiers, summers, differentiators, integrators, active filters, Schmitt trigger, oscillators, dominant-pole (Miller) compensation and phase margin.
Digital Circuits
Area | Topics |
|---|---|
Number representations | Binary, integer and floating-point numbers |
Combinational circuits | Boolean algebra, minimisation using Boolean identities and Karnaugh map, logic gates and their static CMOS implementations, arithmetic circuits, code converters, multiplexers, decoders |
Sequential circuits | Latches and flip-flops, counters, shift registers, finite state machines, propagation delay, setup and hold time, critical path delay |
Data converters | Sample and hold circuits, ADCs and DACs |
Semiconductor memories | ROM, SRAM, DRAM |
Computer organisation | Machine instructions and addressing modes, ALU, data-path and control unit, instruction pipelining |
Control Systems
Modelling: Basic control system components, feedback principle, transfer function, block diagram representation, signal flow graph.
Response and stability: Transient and steady-state analysis of LTI systems, frequency response, Routh-Hurwitz and Nyquist stability criteria, Bode and root-locus plots.
Design and state space: Compensators, PID controller, state variable model and solution of state equations of LTI systems.
Communications
Random processes: Autocorrelation and power spectral density, properties of white noise, filtering of random signals through LTI systems.
Analog communications: Amplitude modulation and demodulation, angle modulation and demodulation, spectra of AM and FM, superheterodyne receivers.
Information theory: Entropy, source coding, mutual information and channel capacity theorem.
Digital communications: PCM, DPCM, digital modulation schemes (ASK, PSK, FSK, QAM), bandwidth, inter-symbol interference, MAP and ML detection, matched filter receiver, SNR and BER, fundamentals of error correction, Hamming codes, CRC.
Electromagnetics
Maxwell's equations: Differential and integral forms and their interpretation, boundary conditions, wave equation, Poynting vector.
Plane waves: Reflection and refraction, polarisation, phase and group velocity, propagation through various media, skin depth.
Transmission lines: Equations, characteristic impedance, impedance matching, impedance transformation, S-parameters, Smith chart.
Waveguides and antennas: Rectangular and circular waveguides, light propagation in optical fibres, dipole and monopole antennas, linear antenna arrays.
The full official document is available on the GATE 2027 test papers and syllabus page: https://gate2027.iitm.ac.in/exam_papers_and_syllabus
Where to Start: Recommended Subject Order
EC subjects build on each other. Studying them in a sensible order saves revision time later.
Order | Subject | Why at this stage |
|---|---|---|
1 | Engineering Mathematics (parallel throughout) | Supports Signals, Control, Communications and Electromagnetics |
2 | Networks | Circuit theorems and Laplace methods are used in almost every other subject |
3 | Signals and Systems | Fourier, Laplace and z-transforms are the base for Control and Communications |
4 | Electronic Devices, then Analog Circuits | Device physics explains biasing and small-signal models in amplifiers |
5 | Digital Circuits | Largely independent and quick to score once practised |
6 | Control Systems | Reuses transfer functions and frequency response from Signals |
7 | Communications | Needs probability, random processes and Fourier analysis |
8 | Electromagnetics | Needs vector calculus; give it regular weekly slots rather than leaving it to the end |
Overlap with the EE and IN Papers
EE and IN are allowed second papers with EC, and the syllabi share large areas. If you plan a second paper, or simply want to use past questions from those papers for practice, this table shows where effort carries over.
Area | EC | EE / IN | How to plan |
|---|---|---|---|
Networks and Signals | Core section | Covered in both | Study once; solve EE and IN past questions for extra practice |
Control Systems | Full section | Covered in both | Shared preparation with minor differences in depth |
Analog and Digital Electronics | Separate detailed sections | Covered in both, usually at a broader level | EC goes deeper; EC preparation is usually enough |
Communications and Electromagnetics | Full sections | Covered only in part (for example, electromagnetic fields in EE) | Mostly EC-specific; study in full for EC |
This comparison is indicative. Check the official 2027 EE and IN syllabi before deciding on a second paper.
Using Previous Year Papers with the Syllabus
The official GATE 2027 website offers previous question papers and answer keys, with a bulk download of papers from 2007 to 2026. They are the most reliable guide to how each syllabus topic is actually tested.
Map questions to topics: After finishing a subject, solve its questions from the last eight to ten EC papers and tag each one with the syllabus topic it tests. This shows which ideas come up often and which appear rarely.
Check the depth expected: Past questions show whether a topic needs a formula, a derivation or a multi-step design calculation. Prepare to that depth rather than reading every textbook chapter end to end.
Read across years carefully: The syllabus has been revised for 2027, so a topic that appeared in an old paper may now be worded differently or sit in a different section. Always confirm against the current syllabus.
Official downloads page: https://gate2027.iitm.ac.in/download
Common Syllabus Mistakes
Treating Engineering Mathematics as optional: It carries 13 marks on its own and supports questions in at least four other subjects.
Leaving Electromagnetics to the last month: It is concept-heavy and needs repeated practice, so a rushed final pass rarely works.
Ignoring General Aptitude: At 15 marks, GA is worth more than many individual EC subjects. Practise it regularly from the start.
Studying from an outdated topic list: Coaching notes and old guides may not match the revised 2027 syllabus. Tick off topics against the official document.
Reading without solving: GATE EC tests application. Every chapter should end with timed problem practice, not just a reading summary.
How to Cover the GATE EC Syllabus
With the exam in February 2027, the plan below assumes about 14 weeks and can be compressed or stretched to suit your start date.
Weeks 1 to 4: Networks and Signals and Systems, with 45 to 60 minutes of Engineering Mathematics daily. Make short notes for formulas and standard results as you go.
Weeks 5 to 8: Electronic Devices, Analog Circuits and Digital Circuits. Start 20-minute topic tests on completed chapters and keep an error log.
Weeks 9 to 11: Control Systems, Communications and Electromagnetics. Add General Aptitude practice three or four times a week.
Weeks 12 to 14: Full-length mocks in the official interface, previous year GATE EC papers and error-log revision.
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