ISRO Scientist/Engineer SC (Electronics) study guide
ISRO Scientist/Engineer SC (Electronics) · Work through your exam, one topic at a time.
The ISRO Scientist/Engineer SC (Electronics) recruitment exam is the written objective test used by ISRO's Centralised Recruitment Board to shortlist electronics engineers for the Scientist/Engineer 'SC' entry grade at ISRO centres such as VSSC, URSC, SAC and SDSC. It targets graduates in Electronics/Electronics and Communication engineering (or equivalent) who want a research-and-development career in space systems rather than a conventional industry role. The ISRO Scientist/Engineer SC (Electronics) study guide has 11 sections and about 3,240 words.
01Electronic Devices and Circuits
Electronic Devices and Circuits tests whether you can move between physical device behaviour and the biasing, small-signal and frequency-response models used in later analog design. Expect questions on PN junctions, BJT and MOSFET operating regions, bias stability, hybrid-pi and T models, and feedback.
320 words, about 2 min02Analog Circuits
Analog Circuits tests op-amp configurations, feedback, filters, oscillators and power stages. Questions usually combine an ideal-op-amp calculation with a non-ideal limit such as slew rate, bandwidth or output swing.
320 words, about 2 min03Digital Electronics and Logic Design
Digital Electronics and Logic Design tests Boolean minimisation, combinational building blocks, sequential timing and CMOS implementation. ISRO questions often combine a K-map with a timing or fan-out constraint.
296 words, about 1 min04Signals and Systems
Signals and Systems tests LTI properties, convolution, transform methods and sampling. Expect a mix of a short computation and a conceptual ROC or stability question.
275 words, about 1 min05Communication Systems (Analog and Digital)
Communication Systems (Analog and Digital) tests modulation, bandwidth, noise performance, sampling and digital link budgets. Questions often ask for one number plus a reason.
294 words, about 1 min06Electromagnetics
Electromagnetics tests Maxwell's equations, wave propagation, transmission-line behaviour and boundary conditions. Expect a numerical reflection or line-impedance question with a physical interpretation.
249 words, about 1 min07Antennas and Microwave Engineering
Antennas and Microwave Engineering tests radiation parameters, arrays, Friis transmission, waveguide cutoff and microwave tube or s-parameter basics. Directivity D = 4πUmax/Prad; gain G = ηradD.
276 words, about 1 min08Control Systems
Control Systems tests transfer functions, stability, time response, root locus, frequency response and state-space properties. Closed-loop transfer function T = G/(1+GH) for negative feedback; characteristic equation 1+GH=0.
304 words, about 2 min09Microprocessors, Microcontrollers and Embedded Systems
Microprocessors, Microcontrollers and Embedded Systems tests architecture, addressing modes, interrupts, timers, memory interfacing and basic embedded design. 8085: 8-bit data, 16-bit address, multiplexed AD0–AD7; ALE latches the low address byte.
319 words, about 2 min10Computer Organization and Networks
Computer Organization and Networks tests the CPU datapath, memory hierarchy, pipelining and the networking stack from framing to subnetting. Pipeline speedup is limited by the slowest stage plus overhead; ideal speedup ≈ number of stages, reduced by hazards and stalls.
309 words, about 2 min11Instrumentation, Measurements and Spacecraft Electronics
Instrumentation, Measurements and Spacecraft Electronics tests transducers, bridge circuits, error analysis, electronic measurement, and the radiation and reliability constraints of space hardware. Accuracy is closeness to truth; precision is repeatability.
278 words, about 1 min