Analog/Mixed-Signal/RF integrated circuit (IC) and board-level design. Experience with block level designs, top-level architectures, and resolving block-block interactions. Experience building complete ICs and product-level modules. Extensive background in digital signal processing (DSP) for audio and radio communications including adaptive techniques. Broad knowledge of wired and wireless communication protocols including cellular, WiFi, USB, and Bluetooth LE. Innovative work has resulted in 8 issued U.S. patents, 9 publications (all lead author), and several awards from IEEE and academia.
Emphasis is placed on scripting and multiplexing simulations in order to maximize verification coverage, repeatability, and reliability while minimizing cost to the client.
SERVICES
Services include, but are not limited to:
Integrated circuit design
Board-level product design
Testbench design
System design and modeling with MATLAB/C/Octave
Algorithm development
EXPERIENCE
Analog Design
Audio amplifier/filter chains
Audio power amplifiers for 8/16 Ohm load
Cellular baseband filters
Sensor readout circuitry
480 Mbps line drivers
High-voltage tolerant circuitry
Bandgap references
Linear, high bandwidth transimpedance amplifiers
Common gate current buffer amplifiers
Matched-filter bit decision circuitry
Mixed-Signal Design
16-bit sigma-delta switched-capacitor ADCs and DACs
Ring oscillator-based clock and data recovery (CDR) PLLs
Sigma-delta fractional-N clock dividers
RF Design
LNAs and LNTAs
Active mixers and passive mixers
Low Phase Noise LC VCO
Integer-N PLL
Custom RF transformer elements, including electromagnetic modeling
RF frequency dividers
RF front end filters
Nonlinear term generation circuits
Power Management Design
Have supervised the designs of:
LDOs
Switched power converters (boost converters)
DSP Design
Upsampling/downsampling chains for sigma-delta converters
Baseband and channel filters
Adaptive equalization algorithms for RF communications
Custom flexible DSP processor
RF antenna calibration algorithms
Audio automatic gain control (AGC) algorithms
Near linear phase IIR filters
All-digital clock and data recovery
Extensive work in MATLAB and Octave
ESD Design
Supervised chip-level ESD implementation for several products on the market that pass JEDEC ESD and Latchup testing.
IOT Development
Developed iPhone app to permit 27kbps file transfer from iPhone to Bluetooth LE peripheral using YMODEM protocol.
Modified stock Bluetooth ASIC firmware (nRF51822) to convert over-the-air traffic into UART traffic destined for microcontroller.
Design Tool Knowledge
Cadence Schematic and Layout, Mentor Schematic and Layout, Keysight ADS, Altium, KiCad, MATLAB/Octave, Calibre, C, Verilog-A, SKILL/OCEAN.