GATE ECE Syllabus 2027: All 8 Sections, Topic by Topic

Official sections

8

Numbered in the EC syllabus PDF

Listed topics

32

Across all sections

Subject marks

85

Of 100; General Aptitude is the other 15

Syllabus status

Revised for 2027

First revision in five years

This page reproduces the official GATE 2027 Electronics and Communication Engineering syllabus exactly as IIT Madras published it — all 8 numbered sections and every topic listed under them — and then explains what the structure implies for the order you study in, which the PDF deliberately does not.

The GATE syllabus was revised for 2027 for the first time in five years. For EC in particular, that makes the official document worth reading line by line rather than skimming: several sections name topics at a level of specificity that tells you exactly how deep to go.

GATE 2027 EC syllabus: how the paper is organised

The official GATE 2027 Electronics and Communication Engineering syllabus is published as 8 numbered sections, listing 32 named topics in total. Those sections are the vocabulary IIT Madras itself uses, so they are the right unit to plan and track against — not the chapter list of whichever textbook you happen to own.

The full GATE 2027 EC syllabus, section by section

Below is the complete syllabus as published, section by section. The wording is the Organizing Institute's own — it has not been paraphrased, because you are going to make study decisions from it.

Section 1: Engineering Mathematics

• Linear Algebra: Vector space, basis, linear dependence and independence, matrix algebra, eigen values and eigen vectors, rank, solution of linear equations - existence and uniqueness.
• Calculus: Mean value theorems, theorems of integral calculus, evaluation of 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, Nonhomogeneous equations, methods of solution using 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, Cauchy's integral formula, sequences, series, convergence tests, Taylor and Laurent series, residue theorem.
• Probability and Statistics: Mean, median, mode, standard deviation, combinatorial probability, probability distributions, binomial distribution, Poisson distribution, exponential distribution, normal distribution, joint and conditional probability, correlation and regression analysis.

Section 2: Networks, Signals and Systems

• Circuit Analysis: Node and mesh analysis, superposition, Thevenin's theorem, Norton's theorem, reciprocity.
• Sinusoidal steady state analysis: Phasors, complex power, maximum power transfer.
• Time and frequency domain analysis of linear circuits: RL, RC and RLC circuits, solution of 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 zeroes, frequency response, group delay, 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.

Section 3: Electronic Devices

• Formation of energy bands in solids, energy bands in intrinsic and extrinsic semiconductors, equilibrium carrier concentration, direct and indirect band-gap semiconductors.
• Carrier Transport: Diffusion current, drift current, mobility and resistivity, generation and recombination of carriers, Poisson and continuity equations.
• P-N junction, Zener diode, BJT, MOS capacitor, MOSFET, scaling in MOSFETs, LED, photo diode and solar cell.

Section 4: 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 and oscillators, dominant-pole (Miller) compensation, phase margin.

Section 5: Digital Circuits

• Number Representations: Binary, integer and floating-point numbers.
• Combinatorial circuits: Boolean algebra, minimization of functions 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 Organization: Machine instructions and addressing modes, ALU, data-path and control unit, instruction pipelining.

Section 6: Control Systems

Basic control system components; Feedback principle; Transfer function; Block diagram representation; Signal flow graph; Transient and steady-state analysis of LTI systems; Frequency response; Routh-Hurwitz and Nyquist stability criteria; Bode and root-locus plots; compensators, PID controller; State variable model and solution of state equation of LTI systems.

Section 7: 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, super heterodyne 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, ML detection, matched filter receiver, SNR and BER. Fundamentals of error correction, Hamming codes, CRC.

Section 8: Electromagnetics

• Maxwell's Equations: Differential and integral forms and their interpretation, boundary conditions, wave equation, Poynting vector.
• Plane Waves and Properties: Reflection and refraction, polarization, phase and group velocity, propagation through various media, skin depth.
• Transmission Lines: Equations, characteristic impedance, impedance matching, impedance transformation, S-parameters, Smith chart. Rectangular and circular waveguides, light propagation in optical fibers, dipole and monopole antennas, linear antenna arrays.

What to notice in the 2027 EC syllabus

Four features of the 2027 EC document are worth reading carefully, because each one is easy to misjudge from a section title alone.

Computer Organization sits inside Digital Circuits

Section 5: Digital Circuits is not only combinational and sequential logic. It also carries Semiconductor Memories (ROM, SRAM, DRAM) and a Computer Organization topic covering machine instructions and addressing modes, the ALU, data-path and control unit, and instruction pipelining. Candidates who treat Digital Circuits as "Boolean algebra plus flip-flops" systematically under-prepare a section that reaches into computer-architecture territory.

Section 2 fuses three classical subjects into one

Networks, Signals and Systems is a single section spanning circuit analysis, sinusoidal steady-state analysis, time and frequency domain analysis of linear circuits, LTI system theory, continuous-time signals (Fourier series and transform, Nyquist sampling) and discrete-time signals (DTFT, DFT, z-transform, FIR and IIR filter design). In most curricula those are two or three separate courses. Its six named topics carry considerably more weight of work than the count suggests.

Engineering Mathematics separates Vector Analysis and Complex Analysis

Section 1 lists six topics, treating Vector Analysis and Complex Analysis as named entries in their own right rather than folding vector calculus into Calculus, as the Electrical paper does. Complex Analysis explicitly includes sequences, series and convergence tests alongside the residue theorem — slightly wider than the corresponding EE topic.

Electromagnetics is specific about what it wants

Section 8 names S-parameters, the Smith chart, impedance matching and transformation, rectangular and circular waveguides, light propagation in optical fibers, dipole and monopole antennas, and linear antenna arrays. Skin depth, phase and group velocity, and polarisation are called out under plane waves. This is a section where the named list maps almost one-to-one onto the kind of question that actually appears.

How the EC syllabus maps to marks

Electronics and Communication Engineering is a three-hour computer-based test of 65 questions and 100 marks. Of those, 15 marks are General Aptitude, 13 marks are Engineering Mathematics drawn from Section 1 of the syllabus above, and the remaining 72 marks come from the core EC sections.

Read that chart again before you plan. General Aptitude and Engineering Mathematics together are 28 marks — more than any single core section of the EC syllabus is likely to be worth, and far more predictable. They are also the two areas candidates most often leave until a month before the exam.

A study order for the EC syllabus

EC is the broadest of the classical electronics papers, and the sections are not independent. Signals-and-systems machinery underpins communications and control; device physics underpins both analog and digital circuits. A sensible order follows those dependencies.

1. 1Section 2 (Networks, Signals and Systems) — first, and without shortcuts. Transforms, convolution, frequency response and sampling recur in Sections 6 and 7, so every hour here is repaid more than once.
2. 2Section 3 (Electronic Devices) — the physical foundation. Band structure, carrier transport and the P-N junction are what make Section 4 comprehensible rather than a set of formulas to memorise.
3. 3Section 4 (Analog Circuits) — sits directly on devices. Small-signal analysis and frequency response are the recurring skills; op-amp circuits are usually the most tractable marks in the section.
4. 4Section 5 (Digital Circuits) — largely self-contained and among the most scoring parts of the paper. Do not stop at logic design; finish the memories and computer-organization topics too.
5. 5Section 6 (Control Systems) — cheap once Section 2 is solid, since it is mostly transfer functions, stability criteria and plots applied to a new vocabulary.
6. 6Section 7 (Communications) — depends on both signals-and-systems and probability. Random processes and power spectral density come first; digital modulation, detection and error correction after.
7. 7Section 8 (Electromagnetics) — self-contained and often deferred, which is defensible. What is not defensible is skipping it: transmission lines and the Smith chart are high-frequency, well-defined marks.
8. 8Section 1 (Engineering Mathematics) and General Aptitude — daily, throughout. Together 28 marks, and the most predictable ones in the paper.

Practising GATE ECE questions against this syllabus

A syllabus tells you the scope; past questions tell you the depth. Two topics can occupy one line each in the PDF and differ by an order of magnitude in how hard they are actually examined — the only way to calibrate that is to solve questions tagged to the specific topic and see what comes back.

Success Tracker breaks this syllabus into a trackable subject → topic → subtopic tree, with a topic-tagged PYQ archive and worked solutions. Start from the GATE ECE syllabus tree or the GATE ECE PYQ archive, and read the companion GATE ECE 2027 exam guide for dates, eligibility and the full pattern.

GATE 2027 EC syllabus FAQs

How many sections are there in the GATE 2027 ECE syllabus?

The official GATE 2027 EC syllabus published by IIT Madras has 8 numbered sections: Engineering Mathematics, Networks Signals and Systems, Electronic Devices, Analog Circuits, Digital Circuits, Control Systems, Communications, and Electromagnetics. General Aptitude is common to every GATE paper and is published separately from the subject syllabus.

Has the GATE ECE syllabus changed for 2027?

Yes. IIT Madras revised the GATE syllabus for 2027, the first revision in five years, to align it with current academic and industry requirements. The official EC syllabus PDF for 2027 is therefore the only version worth planning from — a topic list built for GATE 2022 to 2026 may include topics since dropped and omit topics since added.

Where can I download the official GATE 2027 ECE syllabus PDF?

IIT Madras hosts it on the official GATE 2027 website, gate2027.iitm.ac.in, under the syllabus section. The direct link for the Electronics and Communication Engineering paper appears in the Official GATE 2027 resources block on this page. Download it from the gate2027.iitm.ac.in domain rather than a mirror, since only the official copy is guaranteed current.

Is Computer Organization part of the GATE ECE 2027 syllabus?

Yes. Computer Organization is a named topic inside Section 5, Digital Circuits, and covers machine instructions and addressing modes, the ALU, data-path and control unit, and instruction pipelining. Section 5 also includes Semiconductor Memories — ROM, SRAM and DRAM — so the section extends beyond classical logic design.

How many marks is Engineering Mathematics in GATE ECE 2027?

Engineering Mathematics accounts for 13 of the 100 marks in the EC paper and is Section 1 of the syllabus. General Aptitude carries a further 15 marks, and the remaining 72 marks come from the core EC sections. Engineering Mathematics for EC lists six topics, including Vector Analysis and Complex Analysis as separate named entries.

Does IIT Madras publish subject-wise weightage for GATE ECE?

No. Beyond the split between General Aptitude (15 marks), Engineering Mathematics (13 marks) and the core subject sections (72 marks), the Organizing Institute does not publish a guaranteed per-section marks weightage for EC. Weightage tables circulated elsewhere are counted from past papers, which makes them useful for ordering revision and unsafe as a reason to drop a section.

Which section of the GATE ECE syllabus should I study first?

Networks, Signals and Systems is the highest-leverage starting point, because Communications and Control Systems both reuse its transform and frequency-response machinery. Electronic Devices should follow, since Analog Circuits is much harder to understand without it. This ordering is our editorial judgement — the official syllabus prescribes no sequence, no book list and no time allocation.

Exam dates, the registration schedule, fees and eligibility for this paper are covered in full in the GATE ECE 2027 exam guide. Dates follow the official GATE 2027 Important Dates page, which IIT Madras marks liable to change — the registration schedule has already been revised once. Always confirm on gate2027.iitm.ac.in before acting on any deadline.