GATE ECE Syllabus 2027: PDF & Topics

Official sections

8

Numbered in the EC syllabus PDF

General Aptitude

15 marks

Separate official syllabus, included below

Subject marks

85

Of 100; General Aptitude is the other 15

Syllabus status

2027 document

Compare the cited official versions

This is the official GATE 2027 EC subject syllabus, reproduced from IIT Madras's PDF, with a separate General Aptitude summary. Our explanatory notes highlight scope that can be missed when a familiar section name is used as a substitute for reading the document.

Use the linked sections as a reading checklist. The suggested study sequence is editorial advice about prerequisites; it is not an official timetable, difficulty ranking or forecast of marks.

GATE 2027 EC syllabus: how the paper is organised

The official GATE 2027 Electronics and Communication Engineering syllabus has 8 numbered sections. A paragraph or heading is a formatting unit, not a measure of study time, difficulty or marks. Use this section checklist to navigate the source, then make smaller revision tasks from the actual concepts under each section.

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.

General Aptitude: the other 15 marks

General Aptitude is common to all GATE papers and is published separately from the EC document. The following is a scope summary, not a substitute for the official 2027 General Aptitude syllabus PDF.

• Verbal Aptitude: basic English grammar and vocabulary in context, reading comprehension and narrative sequencing.
• Quantitative Aptitude: data interpretation; computation and estimation including ratios, percentages, powers, logarithms, permutations, combinations and series; mensuration, geometry, elementary statistics and probability.
• Analytical Aptitude: deduction, induction, analogy, numerical relations and reasoning.
• Spatial Aptitude: translation, rotation, scaling, mirroring, assembling and grouping shapes; paper folding, cutting and patterns in two and three dimensions.

What to notice in the 2027 EC syllabus

Computer Organization is inside Digital Circuits

Section 5 includes Semiconductor Memories (ROM, SRAM and DRAM) and Computer Organization: machine instructions, addressing modes, the ALU, data-path and control unit, and instruction pipelining. A revision list limited to Boolean algebra and flip-flops would omit this explicitly named scope.

Networks, Signals and Systems combines several areas

Section 2 spans circuit analysis, steady-state and transient behaviour, LTI systems, continuous-time signals, and discrete-time signals including DTFT, DFT, z-transform and FIR/IIR filter design. Treat its entries as related study tasks; the single section title does not imply a single short chapter.

Vector and Complex Analysis have their own entries

Engineering Mathematics explicitly separates Vector Analysis and Complex Analysis. The latter includes sequences, series and convergence tests alongside complex-variable methods. Check these entries when mapping a general mathematics course to the EC syllabus.

Electromagnetics specifies concrete applications

The document names S-parameters, the Smith chart, impedance matching, rectangular and circular waveguides, optical fibers, dipole and monopole antennas, and linear arrays. Plane-wave topics include skin depth, phase and group velocity, and polarisation. A broad label such as electromagnetic theory should not replace this checklist.

GATE 2026 vs 2027: selected syllabus comparisons

Checked 2026-09-06: we compared the text of the official IIT Guwahati GATE 2026 PDF with the official IIT Madras GATE 2027 PDF linked below. The rows are editorial summaries of selected passages, not verbatim transcriptions or an official change log. PDF layout, spacing and hyphenation differences are normalized; section and PDF-page references identify the compared scope. This is not an exhaustive list of additions or removals, and unchanged components are labelled explicitly.

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.

General Aptitude and Engineering Mathematics together account for 28 marks. Our planning recommendation is to practise both throughout preparation rather than treating them as optional. The distribution alone does not establish their difficulty or your likely score.

A study order for the EC syllabus

One possible route is to establish circuit, signal and probability tools before applying them to communications and control. Adapt the order using your own prerequisite gaps, not an assumed subject-wise weightage.

1. 1Networks, Signals and Systems: connect circuit equations, convolution, transforms and sampling through small examples.
2. 2Electronic Devices, then Analog Circuits: relate device behaviour to biasing, small-signal models and frequency response.
3. 3Digital Circuits: include memories and Computer Organization as well as logic design.
4. 4Control Systems: apply transfer functions, stability tests and frequency-domain methods after reviewing their mathematical basis.
5. 5Communications: revise probability, random processes and signal representations before detection and error-probability calculations.
6. 6Electromagnetics: connect vector calculus to fields, then schedule transmission-line and antenna practice explicitly.
7. 7Engineering Mathematics and General Aptitude: maintain recurring practice across the preparation period.

Worked example

Original illustration: one RC circuit in time and frequency units

This is an original teaching illustration, not an official PYQ or a predicted question. Its purpose is to practise a method under explicit assumptions, not to forecast topic weightage or exam difficulty.

An ideal voltage source drives a 2 kΩ resistor in series with a 0.1 μF capacitor to ground. Output is measured across the capacitor by an infinite-impedance voltmeter; there is no other load or source resistance. Components are ideal and constant. Find the natural-response time constant and the sinusoidal steady-state cutoff frequency where the voltage gain magnitude is 1/√2 of its DC value. Give the cutoff in both rad/s and Hz, and the voltage gain magnitude there.

1. 1Convert first: R = 2000 Ω and C = 0.1 × 10^-6 F = 10^-7 F. Thus τ = RC = 0.0002 s = 0.20 ms. With the ideal source set to zero, the capacitor sees this same resistance; the natural response decays as exp(-t/τ).
2. 2Using the capacitor impedance 1/(jωC), the unloaded voltage divider gives H(jω) = 1/(1 + jωRC). Its magnitude is 1/√(1 + (ωRC)^2), with DC gain 1. Here j is the imaginary unit and ω is angular frequency.
3. 3Set the magnitude to 1/√2: 1 + (ωc RC)^2 = 2, so ωc = 1/RC = 5000 rad/s. Convert angular frequency to cycles per second: fc = ωc/(2π) = 5000/(2π) ≈ 795.77 Hz. Omitting 2π would give the wrong unit and value.
4. 4At cutoff the voltage gain magnitude is 1/√2 ≈ 0.7071, or 20 log10(1/√2) ≈ -3.01 dB. It is not half the voltage amplitude. As a check, doubling R while holding C fixed doubles τ and halves fc under the same no-loading assumptions.

Answer: τ = 0.20 ms; ωc = 5000 rad/s; fc ≈ 795.77 Hz; cutoff voltage gain magnitude ≈ 0.7071 (-3.01 dB relative to DC).

Source check: 2026-09-06. The conceptual reading below supports the method; the official syllabus PDF supports topic scope only. Neither source supplies or endorses this original worked example.

Preparation checklist

Use these editorial prompts for a weekly plan and individual study sessions. Adjust the workload to your available time and current understanding. They are not an official study schedule or a score guarantee, and this one example does not cover the whole paper.

• At the start of the week, map unfinished topics to the official EC sections. Reserve separate sessions for networks/signals and another section, rather than treating this RC illustration as a complete preparation plan.
• At the beginning of each circuit session, redraw the circuit and label source resistance, load, output node and initial capacitor voltage or inductor current. State any idealisations before applying a divider or time-constant formula.
• In one signals session this week, obtain a first-order transfer function, check its DC and high-frequency limits, and label every frequency axis as Hz or rad/s before sketching a response.
• During the next devices or analog session, state the assumed operating region, calculate with that model and then check the bias conditions. In a digital session, verify a truth table or state transition against the stated input sequence.
• Once this week, attempt a timed mixed set with Engineering Mathematics and General Aptitude included. Log unit conversions, sign errors and invalid model assumptions separately from concepts you could not recall.
• In the review session, use pages 2–4 of the linked RC tutorial to explain the difference between time constant and cutoff. Re-solve one error with changed R or C after 48 hours, and schedule another session if the same mistake returns.

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.

Use the GATE ECE topic map to organise revision and the GATE ECE resource hub for available question-backed study companions, released papers and official past-paper links. Read the companion GATE ECE 2027 exam guide for dates, eligibility and the full pattern.

GATE 2027 EC syllabus FAQs

How many sections are in the GATE ECE 2027 syllabus?

The EC subject PDF has eight numbered sections. General Aptitude is common to all papers and has its own PDF; it is summarised separately on this page.

Is Computer Organization in GATE ECE?

Yes. It appears within Digital Circuits and covers machine instructions, addressing modes, ALU, data-path and control unit, and instruction pipelining. Semiconductor Memories is also listed in that section.

Where can I download the official ECE syllabus?

Use the IIT Madras EC PDF linked near the start of this article and in the official resources block. The comparison section links the 2026 source as well, so selected wording changes can be checked against both documents.

How are EC marks distributed?

General Aptitude carries 15 marks, Engineering Mathematics 13 and the core EC sections 72. IIT Madras does not guarantee a separate mark allocation for each core subject.

Should I use a course as my syllabus checklist?

Use the official PDF as the checklist and a course as a learning aid. University courses can cover more, less or differently grouped material; map the relevant lectures or chapters to the exact EC entries.

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, checked 2026-09-06, which IIT Madras marks liable to change. The registration schedule has been revised. Always confirm on gate2027.iitm.ac.in before acting on any deadline.