My primary interests are in analog circuit design and measurement science, because it serves as an interface between the real world and the computational world. I use every opportunity in my work to learn more about the physics of signals and try to find the most efficient way to measure and interact with them. I worked on several IC design tape-outs in 2013 - 2014. Being the first and only student in the group to work on designs, all of these designs were approached from the drawing board - deriving specifications; block and hierarchy design; ESD, bondpad and layout design and testing design. All these designs were done on the AMS 0.35um process, enabled by MOSIS.
Integrated Circuit Design
|Chip Number||Function||Circuit Blocks/Notes||Tape-Out Deadline Date|
|V35JAB||7-bit Binary Weighted Cascoded DAC Current Source||Sooch Cascode Mirror; 7-bit Common Centroid Layout; Current Ref with Start-Up Circuit + Current Mirrors; ESD + Bondpads||May 20, 2013|
|V38GAA||7-bit Current Source with Op-Amp||70dB 1MHz Op-Amp; Level Shifter; Sample and Hold; Shorting Switch||Aug 26, 2013|
|V42MAA||8-bit SAR Analog-Digital Converter||8-bit Resistor Weighted DAC; Verilog synthesized SAR Logic; Comparator; Variable Gain Amplifier; Wirebonded by hand||Feb 3, 2014|
|V4BQAB||4X 7-bit Cascoded Stimulator with Serial-Parallel Data Transfer||Level Shifters; Verilog synthesized Serial-to-Parallel Shift Register||Nov 10, 2014|
Board Level Circuit Design
|SKK-AK-005||4X Programmable Stimulator Board||Howland Current Sources; 8-bit DACs; Arduino Mega Firmware Design; (all SMD parts)||Summer 2014|
|SKK-AK-004||8-electrode Breakout Boards||Routing to Through-hole pins||Summer 2014|
|SKK-AK-003||Programmable 8-bit Current Source (Rev)||Howland Current Source; Sample and Hold; Arduino Micro Firmware Design; VGA; Bias Circuits||Spring 2014|
|SKK-AK-002||Programmable 8-bit Current Source||Howland Current Source; Sample and Hold; V-USB Interface for Atmega88P; Power Supply||Summer 2013|
|SKK-AK-001||SIROF Electrode Mount||SMD Routing to Polyimide Pads||Spring 2013|
Other designs include 3D Printing Designs in SolidWorks for electrode mounts and user-interface designs in Python.