Jay King Email & Phone Number

Ramona, Ca, Us

Vista, California, Us

High speed circuit card design and development. Altium Designer Professional, latest rev.

Palo Alto, California, Us

Completed 12 month contract for design validation testing and debug for state of the art wireless charging ICs. Python programming for device configuration and test automation. Phase noise and jitter testing for free-running and phase locked oscillators. Other circuits of interest include integrated ballast current loads and high efficiency DC-DC converters.

Researched and identified high-performance compact electronic components for a medical device technology start-up. Performed circuit simulations using LTspice. Reviewed circuit designs and recommended areas of improvement.

San Diego, Ca, Us

Full duplex massive-MIMO g Node B base station (gNB) R&D project: designed the antenna power and control distribution circuit card, incorporating an input power controller circuit and a 3rd party Xilinx-based CPU + FPGA system on module (SOM).5G new radio (NR) massive-MIMO gNB project: Multi-level JESD204B clock management/distribution architecture design and implementation. Complex backplane card (power, clock and control distribution) design and development.Digital hardware lead for the FMC+ connector-based radio card which incorporates a sub-array of DACs and ADCs along with real time FPGA-driven RF front end digital control. Drafted the power consumption model and designed the power management architecture with tight RF Engineering coordination. Application Note development.Led the effort to achieve deterministic signal path latency across the array of Tx paths and also across the array of Rx paths across system power cycles.5G NR gNB project: Digital hardware lead for the radio card and also the controller/clock distribution card.People/Line Manager for both Senior and Staff Engineers.

San Diego, Ca, Us

Intrabody communications R&D project: Led design of fully wearable, battery powered RF transmitter and receiver devices (watch and hearing aid form factors) using stainless steel electrodes for measuring body path loss across multiple scenarios. Co-inventor on one patent in this area.Application note development and lab verification for an audio-centric body area network (BAN) ASIC emulation platform, including rapid click-free switching between audio and 2-way voice modes.Designed the power management architecture for a wearable, wireless electrocardiogram (ECG) sensor device incorporating a BAN ASIC. Also designed the electrode sensor interface using an off the shelf ASSP from Texas Instruments.Drafted the power management application note for the ECG sensor device which included the battery charging algorithm and executed the lab verification. Drafted the electrode sensor interface application note and collected data in the lab.Galvanic skin response (GSR) sensing R&D project: Developed polarity switching scheme to allow for stainless steel electrode use on a handheld device. Contributed to a published paper (Effects of grip force on skin conductance measured from a handheld device) and was also co-inventor on one patent in this area.

Clients:Qualcomm Corporate R&D DivisionAudio, Power and Clock Management Systems Engineering services, including architecture design and specification development for audio codec and I2S digital audio circuits, architecture design for an integrated power management system, and clock management system design for a BAN emulation platform.Component selection and hardware design for various circuits including a ground referenced stereo headphone amplifier, dual PLL IC, divide by 125 circuit, I2C control interfaces and bi-directional level shifter.Led effort to expand the I/O capabilities of the emulation platform to include stereo headphone output, analog input, digital audio I/O via S/PDIF, and dual digital microphone input. Performed verification testing and drafted application notes.Qualcomm Enterprise Services DivisionAudio and acoustic Engineering services for a mobile computer device, involving audio hardware architecture and schematic design, acoustic transducer selection and integration, audio calibration and verification testing.Softmax, Inc.Audio Systems Engineering services, including interpretations of documents, specifications and test results provided by customers and also for the relevant industry standards (IEEE, ITU, TIA/EIA, ETSI, BT SIG, 3GPP2).Drafted acoustic specifications for handset devices utilizing dual microphone signal processing technology, provided guidance for reporting industry standard metrics such as terminal weighted coupling loss as a measure of echo performance.FLO TV IncorporatedDrafted acoustic and electrical audio specifications for the FLO TV Personal Television device.

San Diego, Ca, Us

QCT Division:Systems Engineer for audio and analog video mixed signal circuits, including integrated audio subsystems, audio codecs, acoustic transducer interfaces, digital TV encoders, video DACs and video cable drivers.Led technical efforts to incorporate new audio and video features into QCT development platforms including component selection, schematic design and board layout guidelines.Project Engineer for two cards: a car kit interface incorporating a Microchip Technology MCU, and a FM Radio Card.

San Diego, Ca, Us

Audio and acoustic Engineer for cdma2000 handsets, smartphones and module products, which included acoustic component selection, integration, audio calibration and verification.Sole inventor for two patents, one related to side-tone noise suppression and the other to headset interfaces.

San Diego, Ca, Us

Hardware Engineer for battery charging accessories, and audio and acoustic Engineer for early-generation CDMA handsets.Sole inventor for two patents, one related to adaptive equalization in the reverse link speech signal, the other related to headset interfaces.

Solved design related hardware problems including CPLD logic bug fixes, improved factory yields and reduced bill of materials costs for high-end video production systems. Designed a cost-reduced DC-DC switch mode power supply.