John Joyce Email & Phone Number

Cambridge, Gb

Cambridge, England, United Kingdom

Technical lead for the Test Engineering function.

Cambridge, England, United Kingdom

Overall accountability for in-house product test capability and execution, with a heavy focus on automated parallel test.Responsible for managing and growing the Test Engineering team to six, and architecting test systems.Worked closely with production test and qualification activities.

Cambridge, United Kingdom

I founded CamTest in 2010 so I could use my experience to produce bespoke test systems for the semiconductor, electronics and biotech industries. It focussed on automating existing manual test processes and procedures.Example projects:Timing generator for high-volume production test of mixed-signal controller IC- designed daughterboard for a basic mixed-signal tester's loadboard, comprising a CPLD and DACs, to improve waveform generation capability. Laid out PCB, wrote CPLD code, and supplied documentation.Rig for electrical characterisation of a biosensor array chip- NI PCIe FPGA card for digital data acquisition, Agilent DMM for analog measurements- designed all rack hardware including schematics, PCB layouts- up to 64 devices tested at once, with the majority of tests performed on all deviecs in parallel- software in LabView and LabView FPGA; results stored in MySQL database with web frontend for simple device management; Excel macros for result retrieval- two extra rigs constructed for moderate volume (several hundred per month) production test, requiring test time reduction, and ruggedness improvementsAutomated rig for characterisation of high-power (up to 4500V/1200A and 1200V/3600A) IGBTs under normal switching and short circuit operation, using both conventional and novel gate drives- developed basic rig architecture- hardware mainly off-the-shelf instruments- wrote software in LabView, MySQL database for result storage, and simple web interface for management of test samplesLegacy system maintenance / support / improvement- reworked LabView / LabView RT / LabView FPGA based microfluidics control to add datalogging, control of extra instrumentationProduction test development- wrote test specification for large sensor array chip- worked with external test development vendor / test house to develop hardware and software, and deploy resulting project

CamSemi designs low-cost mixed-signal SMPS control chips. I designed rack-and-stack test systems for them, and power supply applications using them. The test systems comprised a mixture of off-the-shelf instrumentation and bespoke electronics, with software written in-house. Data was collected into MySQL databases, with in-house software tools for data analysis and presentation.

Phd, Power Electronics

Thesis "Current Sharing and Redistribution in High Power IGBT Modules".

Ba (1St), Meng, Electrical Engineering

Two years of Natural Sciences (physics & chemistry), then two years of engineering.