01 / Context
Research inside a community.
In the Wireless Integrated Circuits and Systems Group (WICS) at the University of Michigan, I worked with Prof. David Wentzloff on circuit blocks for a totally implantable auditory-prosthesis research system.
02 / Problem
Preserve the information. Respect the power budget.
The interface had to operate under tight power constraints while maintaining useful noise and stability behavior. That made the boundaries between the sensor, amplifier and filter as important as the individual blocks.
03 / What I did
Design the whole signal path.
I developed blocks for a MEMS/ASIC interface, including transimpedance amplifiers and active RC filters in TSMC 65nm. The work used subthreshold circuit design and considered the system's packaging and interface constraints.
I evaluated stability and noise across process, voltage and temperature conditions using Cadence Virtuoso and SPICE. The work required following how a design decision in one block affected the rest of the signal path.
04 / What mattered
A design tested across operating conditions.
Transimpedance amplifiers, active-RC filters, and MEMS/ASIC interfaces under tight power constraints.
The work produced circuit blocks and simulations across process, voltage, temperature, noise, and mismatch conditions. It strengthened the connection between individual circuit choices and the requirements of the research system.
05 / Reflection
The device is only part of the question.
The research widened my interest beyond circuit performance. Manufacturing, adoption, and support became questions I wanted to understand alongside the design.
06 / Selected evidence
The record behind
the work.
Circuit development and simulation for a research system.