The Analog Mixed Signal and Photonic IC (AMPIC) Laboratory is directed by Dr. Vishal Saxena. The Lab is equipped with state of the art workstations and instruments for Analog, Mixed-Signal and Photonic Integrated Circuit design and testing. The AMS lab also houses the Linux server cluster supporting the Cadence and Synopsys tools for research and teaching activities.

Current Research

  • CMOS Photonics IC for energy- and spectrum-efficient optical interconnects
  • Continuous-time ΔΣ ADCs for next-generation wireless systems and software-defined radios
  • Neuromorphic ICs for dense-integration of Cortical- and Machine-Learning algorithms

Ongoing and Completed Projects

  • Neuromorphic ICs for pattern recognition aplications with integrated silver-calcogenide memristors
  • Energy-efficient CMOS receivers and transmitters for 10 Gbps silicon photonic interconnects
  • CT ΔΣ ADCs with >1 GHz sampling rate in 130nm CMOS
  • Hybrid CT ΔΣ and Multi-step ADCs for wideband (>40 MHz) conversion
  • CT ΔΣ modulator for biomedical applications in DARPA/MITLL 150nm FD-SOI CMOS

Analog and Mixed-Signal Integrated Circuits

Rapid evolution of wireless broadband communication systems has necessitated development of power-efficient mixed-signal circuits with ever increasing signal bandwidth and flexibility of operation in multiple frequency bands. Challenges involve design of energy-efficient data converters in scaled nano-CMOS technologies where transistors offer high-speed although with poor gain and increased device variability. We are investigating novel analog-to-digital conversion architectures which will enable future wireless networks (IEEE 802.11ac+) and software-defined radios in nano-CMOS technologies. The architectures of interest include Continuous-time Delta-Sigma modulators with multi-step quantizers, Direct RF-to-digital conversion, Multi-band and Cascaded modulators. These architectures are expected to achieve wideband conversion (>25 MHz) with dynamic range >75 dB with figure of merit <100fJ/bit. Also of interest are phase locked loops with wide frequency range (900 MHz-5 GHz) and radio frequency front-ends for delta-sigma converters.