Bryan Colvin

Portfolio and Skills

Analog Design

Audio EngineeringProAudio, Low Noise(-120dB), Consumer

Power SupplyVoltage: Buck, boost, inverting, isolated, Flyback

Current: Source, Sink, AC, charge pumps, mirrors

AmplifiersOp Amps, Custom, Power, Class-AB, Class-D

Filters(All configurations and implementations)

High Side Power Switching and monitoring

LT-Spice Modeling

Interface electronicsADC, DAC, Logic translation, Displays, isolation, Sensors

Video: HDMI, Component, S-Video, Composite, etc.

Gigabit Ethernet, RS-232, USB2.0, 1394, MIDI, AES/EBU, SPDIF, etc.

PCB/Logic Design

High SpeedImpedance controlled routing, Cross Talk, EMI reduction, differential routing

Termination (series, shunt, thevenin, AC, series/shunt with logic translation)

Clock Distribution, PLL, DLL, Frequency Synthesis

Signaling StandardsSingle Ended: TTL, CMOS, ECL, PECL, LVTTL, LVCMOS, GTL, GTL+, PCI, HSTL(I,II,III) SSTL(I,II), etc.

Differential: LVDS, BLVDS, Ultra LVD, SRSDS, LDT, etc.

Logic translation circuits, SERDES, SPI, I2C, I2S, JTAG, PCIe,SCSI,CAN,SATA

PCBLow cost 2-layer to 12 layer stacks, buried vias, etc.

BGAs, SMT, through-hole components, DFT, DFM

EMI isolation moats, bridge routing, optical isolation, balans

Stacking rules, mechanicals, shielding, power routing/ distribution

MemoryDDR, DDR2, GDDR3, ROM, EEROM, FLASH, FIFO, etc.

Systems Design

Systems ModelingC++, Data throughput modeling, optimization

Verilog Test bench with auto regression

Embedded Processor verses Logic Design partition space

Data transport optimization

ProcessorsCustom Processor Design: DSP, IO, VLIW, multi-threaded, data-path engines, SIMD

Compiler for the above in (written in C++)

FPGA/ASICMemory controllers: DDR/DDR2/GDDR3

Interface: SPI, I2C, ADAT, I2S, UART, etc.

State Machines: One-hot, shift register, anticipatory decoding, partitioning, optimization, LFSR, gray-coded, state optimization software in C++, timing systems, compiled ROM using C++, high-speed optimization, asynchronous

FIFO, queues, cache, Multiple clock domains, synchronization circuits.

CRT controllers, CAM, Encryption, Compression, Multiple clock domain management

Signal Processing

Synthesizer / MusicADSR with true logarithmic decay

Wave Guide Synthesis modeling

FM synthesis engines

Traditional wave table engines

Mixer including EQ

Dynamic Sample Rate Conversion

Room modeling / reverberation

Effects processing

GeneralFFT engines, Sample rate conversion using odd ratios,

FIT / IIR / Dynamic / Adaptive filters

VideoH.264/VC1 Motion compensation

Media filters, scaling, rotation

Patents

5,245,229 - Digitally controlled IC Anti-Clipping Mixer5,307,025 - Audio power amplifier with pop prevention at turn-on and turn-off5,468,906 - Sound synthesis model incorporating sympathetic vibrations of strings5,557,227 - Exponential Envelope Generator5,451,911 - Multi-Phase PLL Timing Generator5,543,578 - Residual Excited Wave Guide5,825,881 - Merchandising System5,841,872 - Data Spinning Encryption System6,041,123 - Encryption Communications SystemPending Phantom Power Supply SystemPending Current Pump System