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About me

Hashem received the B.Sc., M.Sc., and PhD degrees from Sharif University of Technology, University of Tehran, Tehran and University of Westminster, London in 2000, 2003 and 2008 respectively.

Since 2006, he has been with Cambridge Silicon Radio (CSR), Cambridge, UK where he designs high-performance analog and mixed-signal circuits and systems for use in Audio, Bluetooth and Wifi chips. He is currently a Principal Analog/RF IC designer at CSR.

In 2008, he joined the Electronics Department, University of Westminster teaching Advanced Analog Microelectronics courses. He is currently a visiting lecturer at the same University.

He has published several IEEE conference and journal papers and holds 9 US Patents all with the focus on analog and mixed-signal systems and circuits.

Teaching

Analog Microelectronics for the final year students. This module is the equivalent to Electronics III on some other universities. Indicative Syllabus Content:

  • Basic principles, operation and small signal analysis of MOS transistors
  • Design and analysis of CMOS current mirrors, differential pairs, cascade configurations and active loads
  • Analyzing the frequency response of CMOS amplifier configurations and Miller-effect. The amplifier topologies include common source, common drain and common gate circuits
  • Analysis and investigation of different type of feedback systems.
  • Study, design and analysis of operational amplifiers. Various parameters such as slew-rate, dc-gain and offset are studied. Design strategy of operational amplifier is presented.
  • Stability concept and frequency compensation techniques in operational amplifiers. Various parameters such as gain-bandwidth and phase-margin are covered.
  • Noise analysis of building blocks including thermal and Flicker
  • Discussing and presenting the basic principles of low-power design techniques
  • The art of analog CMOS design and simulation. Use of analog simulation to facilitate the appropriate selection of device dimensions is undertaken.

My research interests include the circuit- and system-level design of analog and mixed-mode ICs including switched-capacitor/continuous-time delta-sigma, pipeline and SAR ADCs, high-precision low-noise analog circuits and analog/digital Phased-Locked-Loops (PLLs).

I organize many IEEE lectures/talks/seminars for Electronic companies across Cambridge by inviting the IEEE distinguished lecturers. Please keep in touch if you would like to attend such conferences or you would like to give a talk or a course to the industry.

Research

My research interests include the circuit- and system-level design of analog and mixed-mode ICs including switched-capacitor/continuous-time delta-sigma, pipeline and SAR ADCs, high-precision low-noise analog circuits and analog/digital Phased-Locked-Loops (PLLs).

I organize many IEEE lectures/talks/seminars for Electronic companies across Cambridge by inviting the IEEE distinguished lecturers. Please keep in touch if you would like to attend such conferences or you would like to give a talk or a course to the industry.

Publications

For details of all my research outputs, visit my WestminsterResearch profile.