ANALOG-TO-DIGITAL CONVERTERS (Syllabus: GS Paper 3 - Sci & Tech)

Get an Instant Call Back from Our Expert Mentors Now!

+91

Context: A newly designed prototypes in the Next-Generation Photonic Analog-to-Digital Converters (NG-PADC) project which can carry out instantaneous frequency measurement, generation and transport of Radio Frequency (RF) through optical methods could revolutionize various sectors, enabling faster digital communication, improved satellite communication, better medical imaging, and Photonic radars.

An NG-PADC developed by IIT Madras with support from the IMPRINT programme of Science, Engineering, Research Board (SERB), is equipped with a time-stretched photonic ADC whose effective bandwidth is 12 times higher than a corresponding EADC, which enables sampling of higher bandwidth signal with effectively lower bandwidth EADCs.

Key Points

Analog-to-digital converters (ADCs) are critical components for developing the next generation of advanced digital receivers.

The limitation of electronic ADCs (EADCs) is that their vertical resolution is compromised at high bandwidths. There are two possible approaches to solve this problem through Photonics.

RF, when modulated on a spectrally rich optical pulsed source, can be stretched in the optical domain through a dispersive medium, thus converting high-frequency RF signals into effectively low-frequency signals.

This reduces the input bandwidth requirements of the back-end ADC as many times as the stretch factor of the optical pulse.
The other Photonic approach is to use an optical clock whose fluctuations in timing (timing jitter) is much smaller an electronic clock; which is possible with a short pulsed laser. High bandwidth RF signals, when sampled with stable optical clocks, can provide a much higher effective number of bits (ENOB) compared to electronic clocks.
It has time-stretched photonic ADC with effective bandwidth 12 times higher than EADC, which enables digitisation of signals with a much larger precision.

UPSC QEP 2026 Batch 5 - English

Buy now View Details

Submit Your Details to Learn More

NEEV GS + CSAT Foundation 2026/27

Buy now View Details

Our Popular Courses

UPSC Prelims Foundation Course (GS + CSAT)

UPSC Mains PYQ Solved

UPSC Mains Answer writing Course

UPSC Mains test Series 2026

Library

UPPSC Prelims Crash Course 2025 - NISCHAY

UPPSC Mains Course 2025

UPPSC Mains Course in Hindi

Best IAS Coaching In Delhi, UPSC Online & Offline Classes by IAShub

Are you dreaming of becoming an IAS officer? Then, IAShub can be your best guide. It is one of the Best IAS Coaching in Delhi. Many students who want to clear the UPSC exam join IAShub for learning. The institute gives both online and offline classes. Their teachers are experienced and helpful. They easily explain every topic. Students also get notes, tests, and tips to do well in the exam.

UPSC Online Classes by IAShub

IAShub is in Delhi and is trusted by many UPSC students. It offers coaching for every part of the UPSC exam – Prelims, Mains, and Interview. The classes are simple and easy to understand. The teachers are experts and guide students in the right way. IAShub is also known for its helpful notes, test series, and answer-writing practice. IAShub is the best coaching in Delhi and also gives UPSC Online Classes. This helps students from any place in India to learn. The online classes are live and also recorded. So, students can watch them anytime. These classes cover the full UPSC syllabus.

Key Offerings Provided by IAShub

Here are some important services provided by IAShub:

UPSC Prelims: IAShub teaches for Prelims with a focus on basics. It also gives daily current affairs and monthly magazines.
Classroom Courses: IAShub has classroom learning for students in Delhi. The environment is good and peaceful for study.
Live Classes: Students who live far can join live UPSC online classes. These classes are just like real classes.
QEP for Mains: The Quality Enrichment Program (QEP) is special for Mains preparation. It helps students write better and faster.
Answer Writing: Regular answer writing practice is given. Teachers also check answers and give tips to improve.
Free Resource: IAShub gives free notes by toppers and helpful Main Booster material.
Test Series: Test series are available for every subject. These help students know their weak points and improve.
Interview Guidance Session: IAShub also gives interview practice sessions with experts. These help students feel confident.

UPSC Exam Overview

The UPSC Civil Services Exam has three parts:

Prelims: It has two papers: General Studies and CSAT.
Mains: It has nine papers, including essays and optional subjects.
Interview: It tests the personality and confidence of the student.

This exam is tough, but with the right guidance, it becomes easy to manage. Students must study smart and stay regular.

How IAShub Helps in the UPSC Journey

IAShub supports students from the beginning to the end. It gives the right books, tests, and notes. The classes are easy to follow, and the teachers are always ready to help. Students get personal doubt sessions too. The test series and answer checking help students learn where they need to do better. Also, free study materials save time and money.
IAShub also guides students during the final stage – the interview. Experts take mock interviews and give useful tips. This full support makes IAShub one of the best IAS coaching in Delhi.

Best IAS Coaching In Delhi FAQs

Yes, IAShub offers live and recorded online classes. Students can attend from any part of India.

Classes are available in both English and Hindi, so students can choose the language they are comfortable with.

The classroom centre is located in Delhi. Students can visit and join offline batches there.

IAShub gives interview guidance sessions to help students prepare for the final round of UPSC.