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Dr Immanuel Raja

Area of Research

Area of Research
My research lab is called as "Integrated Circuits and Systems Lab". You can find more details of our research work here. I am looking for a PhD candidate during the June 2025 recruitment. If you are interested to work with my group, please apply here.

Department

Education

  • PhD and MSc (Engg) from Indian Institute of Science (IISc), Bangalore (2011 - 2016)
  • B.E. (ECE) from Madras Institute of Technology campus of Anna University, Chennai (2007 - 2011)

I teach courses related to circuits both discrete and integrated. 

AVM 862: RF Integrated Circuits

Offered: Jan - May 2020, 2021, 2022, 2023, 2024, 2025

The course covers the fundamentals of CMOS RF frontend for wireless communication systems along with circuits such as Low noise amplifiers (LNAs), Mixers, Power amplifiers, Oscillators, Phase-locked loops (PLLs). The course includes a design project which carries 40% of the credit towards the grade. A commercial 65nm CMOS process is used for design exercises and projects. This course is offered as an elective to students from MTech - VLSI & Microsystems, MTech - RF & Microwave Engineering and BTech - Electronics and Communication Engineering. 

AVM 861:  Mixed Signal VLSI Design 

Offered: Jan - May 2020, 2021, 2022, 2023

The course deals with design of CMOS VLSI circuits for data converters and high-speed IO interfaces. Various circuits and systems related to the design of Analog-to-digital  converters (ADC), Digital-to-analog converters (DAC), high-speed wireless transmitter and receivers. This is an advanced course and requires AV 611 (Analog VLSI Circuits) as the requiste background. This course includes a design project which carries 50% of the credit towards the grade. A commercial 65nm CMOS process is used for design exercises and projects. This course is offered as a core course to the students from MTech - VLSI & Microsystems. 

AVM 864: Advanced VLSI Design 

Offered: Jan - May 2024, 2025 (shared with Dr. Sheeba Rani)

This course contains multiple modules which include data converter design, high speed IO design (SERDES), memory circuits, ultra-low power digital design, digital verification, etc. 

AVM 613: Analog VLSI Circuits

Offered: Aug - Dec 2019, 2020, 2021, 2022, 2023, 2024

The course covers the analysis and design of CMOS analog VLSI circuits. The design of opamps is the core of the project with its associated circuitry. This course includes a design project which carries 40% of the credit towards the grade. A commercial 65nm CMOS process is used for design exercises and projects. This course is offered as a core course to the students from MTech - VLSI & Microsystems and as an elective to the BTech - Electronics and Communication Engineering.  

AV 211: Analog Electronic Circuits & AV 231: Analog Electronic Circuits Lab

Offered: August - Dec  2019, 2020, 2021, 2022, 2023, 2024

This course deals with the design of analog electronic circuits and systems using BJTs, MOSFETs, op-amps and timer ICs. This is a fundamental course on circuits offered to the 3rd semester students of BTech ECE and BTech Engineering Physics together. The lab course is made interesting with each experiment requiring the student to design for a given set of specifications and implement their circuit on a breadboard and verify the performance. Students are made to appreciate the challenges in real-life engineering problems. The lab course also includes a lab project, where students work in groups to develop a working prototype of a circuit for a particular application. 

AV 213: Network Analysis 

Offered: Aug - Dec 2020

This course deals with the analysis of basic RL, RC, RLC circuits in time domain and frequency domain. Two-port networks, bode plots and relationships between step response, pole locations and frequency domain performance are covered. 

  1. High Performance SAR ADC with Auto-Calibration and Self-Correction for Sensor Closed Loop Applications [June 2021-May 2024] - Funded by ISRO Inertial Systems Unit (IISU) for Rs. 67 lakhs.
  2. Design of Multi-channel Temperature Monitoring ASIC [Dec 2022-Dec 2024] - Funded by Vikram Sarabhai Space Centre (VSSC), ISRO for Rs. 23.6 lakhs.
  3. Design of a Transmitter with Integrated Power Amplifier (PA) for Millimeter-wave 5G Bands in 65nm CMOS [Dec 2020 - Dec 2022] - Funded by SERB - Start-up Research Grant (SRG) for Rs. 30 lakhs.
  4. Design of On-Chip Passives for Millimeter-wave (Ka-band) Circuits [April 2020 - March 2022] - Funded by IIST-Fast Track Project for Rs. 10 lakhs

ASIC Design Lab - with CAD tools available for IC design.

ESD-Safe ASIC Characterization Lab with workbenches

Millimetre-wave IC testing

  • Probe station (with MEMS group) upgraded to RF probe station with probing equipment up to 40 GHz

    • 100um GSG probes

    • 100 um GSSG probe

    • DC quadrant probes

    • 2.92mm cables for testing up to 40 GHz

    • Adapters, bias tees, DC blocks up to 40 GHz

  • Vector signal generator up to 44 GHz with modulation bandwidths up to 120 MHz

  • Vector network analyzer (with RF & Microwave group) up to 40 GHz

  • Vector signal analyzer with noise head (with RF & Microwave group) up to 40 GHz

  • Analog signal generator (with RF & Microwave group) up to 40 GHz

Analog & Mixed-signal test equipment

  • NI Modular testing equipment (10 slot chassis)

    • Multifunction IO card capable of

      • 8 analog outs

      • 8 analog differential inputs

      • 48 digital IOs

  • RF SoC ZCU208 FPGA Evaluation Kit

  • Dual Channel Source Measure Unit (SMU)

  • DC power supplies

  • Multi-function test setup - Moku: Lab by Liquid instruments with the following capabilities:

    • Function generator

    • Digital storage oscilloscope (up to 300 MHz at 1 GSa/s)

    • Arbitrary signal generator

    • Spectrum analyzer

    • Frequency response analyzer

    • Data logger

Tapeout 1: UMC 180nm

  • Test inductors
  • Ring oscillators based physically unclonable function (PUF) circuit
  • Reconfigurable instrumentation amplifier 

Tapeout 2: UMC 65nm

  • Wideband 28 GHz power amplifier (PA)
  • Fully integrated transmitter with injection-locked quadrature oscillator, active linearized up-conversion mixer, driver amplifier.
  • 101-105 GHz fundamental VCO with integrated on-chip antenna
  • 101-105 GHz fundamental VCO with injection-locked frequency divider 
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