Silicon Engineer, Digital job in Mountain View, CA

HOUSHANG AGHAHASSAN

************@*****.***

669-***-**** (C)

Los Gatos, CA, 95030

OBJECTIVE

CMOS, BJT or BiCMOS Analog, Mixed-Signal, RFIC

EDUCATION

MSEE, Lund University, Lund Sweden, 1990

SKILLS

Solid background in RF hardware low/high power, radio-frequency RF/Analog circuit design and analysis

Experience in wireless communication system such as front end, transmitter architecture and parameter selection, especially circuit design such as Power Amplifier, Mixer (MODULATOR), LPF (low Pass Filter) PGA (programmable Gain Amplifier) or voltage gain amplifier, VCO, Low noise amplifiers LNA, DC-offset cancellation, AGC, LDO, BG and OpAmp etc. for use with RFIC designs

Proficient and innovative design of all transceiver from converter to the antenna for Variety of wireless communication such as Wifi, Super-wifi, WiMAX, LTE, UWB, Zigbee Power Amplifier (20, 30dBm), 802.11abg and GPS.

Experience with passive and active device to implement them on PCB for prototype design to test PA and RFIC.

Experience in ESD, packaging and board technology.

Extensive experience in “ADS”, ”HFSS” and “CADENCE Specter-RF” to simulate, design and implement a range of RFIC Designs“ =Superstar= Professional” and “pspice” to simulate and design all part of RF circuitry.

Able to work together with other engineers and individuals to solve and define the developmental problems.

Excellent communication and organization skills.

WORK HISTORY

2024- June to June 2025- May: Meta:

Develop an RF automation test tool to automatically measure the RF performance of connectivity systems (WiFi, BT, GPS, NFC, Wireless USB and Wireless Power Charging).

Run RF test and characterize the RF performance of connectivity systems (WiFi, BT, GPS, NFC, Wireless USB and Wireless Power Charging).

Analyze test data from automation tools and provide test reports to internal and external teams.

Develop and execute test plans and test cases for connectivity RF systems.

Conduct tests to validate RF system performance and identify areas for improvement.

Work closely with internal and external teams to ensure that the RF automation tool meets automation requirements.

Use RF equipment such as network analyzers, communication testers (Litepoint, CMP180, CMW500, CMW100, Anritsu, etc.), spectrum analyzers, power meters, power supply, temperature chamber, near-field scanners, etc. to perform tests.

Minimum Requirements:

3+ years of experience with RF connectivity test and automation tool development for wireless consumer electronics or similar industry such as infotainment.

Experience with RF automation tools from chipset vendors and Python programming.

Experience with WiFi, BT, GPS RF minimum performance requirement.

Experience with RF equipment such as network analyzers, communication testers (Litepoint, CMW500, Anritsu, etc.), spectrum analyzers, power meters, power supply, temperature chamber, near field scanners, etc.

Good communicator and collaborator.

BSEE or related engineering discipline.

June 2023 to 2024- June :Apple:

as test/validation engineer worked with group of engineer to resolve the problem with RF effect on BMU (Battery Managements Unit) which it cause the watch turned off with high RF-output to building up test environments with python software to control and do automatization of test set up with VSG (vector signal Generator), VSA (vector signal analyzer), oscilloscope… for this purpose it require skills of:

RESPONSIBILITIES:

- 5+ years significant proven experience crafting consumer electronics and/or embedded systems

- Must have strong EE fundamentals (analog/digital design, signal/power integrity, etc.)

- Should demonstrate strong verbal and written communications

- Experience in a lab environment prototyping circuits, design bring-up, plus hands-on with oscilloscopes, spectrum analyzers, DAQ, et

- Experience in Scripting or test automation; experience with simulation tools such as Matlab, Python,

- Should have experience leading high volume products from concept to mass production

- Experience with leading PCB technology and electrical design and characterization of the following areas: Differential serial links (e.g.LPDP, MIPI) and I2C/SPI/UART buses.

- Experience in one or more of: MCU/CPLD, power (DC-DC converters, power management, low power design), analog circuits, display technology, and system integration.

- Expertise in board CAD tools including Cadence Concept & Allegro

- Experience in modeling power consumption for various usage

- Experience in predicting hardware performance by simulation

- Experience in capacitive multi-touch preferred

Description

• Define RF test matrix based on hardware and system requirements.

• Collaborate with internal and external engineering and manufacturing teams on test coverage, design, implementation and execution.

• Perform and automate RF testing and data analysis at component and system levels.

• Work with engineers to debug and root cause test anomalies.

• Review test data, create test reports, define pass/fail criteria at qualification and production.

2022-Dec to 23-Jun: Facebook: Validation Engineer (NI-DAQ) (Sunnyvale)

Support power system validation and performance characterization activities for the Electrical Engineering team

Execute validation strategy and co-ordinate with cross functional teams to come up with detailed test plans for power subsystems in products under development

Track test progress, document bugs, and fixes and produce regular progress reports

Develop code to automate lab measurements (Labview, Python)

Working with embedded systems that run on Android/Linux

Create test setups, collect and analyze data to help debug technical issues.

Convert large amounts of data into a clear summary to communicate to stakeholders at all levels.

· Experience in troubleshooting with components and bringing up new prototypes.

· Hands-on experience in detailed testing of at least one electrical subsystem such as power regulators, battery & charger, sensors, and microcontrollers. Experience learning quickly and extend to other areas as needed

2021-Apr. to 2022-Dec: Nvidia: Test, Debugs and analysi (Santa Clara)

Power & Perf measurements under various usecase scenarios, associated debugs and analysis

• DDR interface bring up and qualification activities

• PVT qualification & debug of systems (small and large sample size) intended for testing HW-SW co-working stability

• Electrical measurements of different IO interfaces, first level analysis & debugs

• Functional validation of IO interfaces

2021-May to 2022-Mar: Facebook: Validation Engineer (NI-DAQ) (Sunnyvale)

Responsibilities:

Conduct hardware tests and gather power measurements on hardware platforms, working closely with cross functional teams

Document and report test methodology and gathered data to share across the organization

Design and build significant parts of the test automation infrastructure for hardware teams across the org.

Contribute to an automation framework which interfaces with electrical equipment (power supply, data acquisition units) and DUTs

Review current hardware test plans and translate them into automated test scripts

Support analyzing, testing, and validating of software and hardware features

Write and maintain documentation for automation framework and test procedures.

2020-Sep to 2021-April Intel: Hardware Lab tester (San Jose)

Working as test-engineer to Build configure and test server validation platforms and Troubleshooting when validation platforms fail to yield desired results.

Installation and configuration of network KVMs and power distribution units Anticipate and diagnose equipment problems. Experience with lab test equipment such as oscilloscope, Signal Generators, Spectrum Analyzers, Power meters etc

2020-jan to 2020-May: Microsoft: Analog Verification Engineer (synopsys software) (Sunnyvale),

Working as design verification to test and check all spec of design in SOI like PVT (variation in process, voltage and temperature) in eldor Synopsys tools.

Most of the work is towards to analog blocks like test mux, bandgap, level shifter and so on.

2017- Sep to 2019-Des Google: RF testing and validation of radar performance. (Mountain View)

Characterize hardware performance and quantify impact on radar signal quality

Bring up new board design together with hardware and software teams

Review schematics and board layout

Develop and implement calibration routines to ensure uniformity of data outputs across multiple sensor units

Develop and implement test procedures in python and LabVIEW to ensure sensor quality in hardware and software

Support software and algorithm teams by consulting them on RF component design

Overall Responsibilities:

1. Test and optimize RF boards and circuits. 2. Bring up and test RF boards. 3. Measure board performance. 4.Writing some program in python and LabVIEW and python to automatization of testing.

Advanced knowledge of RF test instruments, fixtures, measurements and methods understanding of signal analysis.

this job required extensive experience on using Microwave/Millimetre-wave test by using equipment like Network analyzer, Spectrum analyzer, Signal Analyzer,Signal Generator and oscilloscope.

2016-Des to 2017-Sep Facebook: Senior Validation / Testing Engineer – (Menlo Park), CA

JOB DESCRIPTION:

work evaluating the latest 802.11d – WiGig standards product most of the work was directed to RF performance, validation and signal integrity testing of Microwave backhaul systems Perform at board level.

this job required extensive experience on using Microwave/Millimetre-wave test by using equipment like Network analyzer, Spectrum analyzer, Signal Analyzer,Signal Generator and oscilloscope.

2015-Mar to 2016-Dec QUALCOMM Senior Application Engineer – (San Jose), CA

Responsibilities:

As the technical support lead, ensure successful integration of 802.11 WLAN, Bluetooth, and GPS products into mobile, PC, and consumer electronics. Engaged with a customer to design PCB with passive and active device for application platform, be able to map out the technical details of a system integration plan, from project start through mass production. Working with various instruments, such as Litepoint (VSA,SGA), for performance measurement of different Tx / RX modulation skim like 802.11 a,b,c, n, spectrum analyzer, logic analyzer, VSA, and scopes., including managing customer issues, technical design support, document/information release process.

2013-2015 Canopus system (Title Senior RF Design Engineer), (Moffett Field)

Working with 30 engineers to integrate hardware in satellite system, the primary application of satellite’s payload is Earth imaging, so the architecture is oriented around the collection, filtering, storage, retrieval, and transmission of image data, my rolls was to Develop and implement RF solutions for radio in Ka-Band for data transmitting, UHF radio for control and communication and ensure the RF component / any radio with sub blokes meeting the spec: RF power amps, DROs, mixers, filters, matching networks to antenna, etc, to do so it needs schematic and layout through PCB design with passive and active device.

To get best RF performance testing Using bench equipment; network/spectrum/vector analyzers, oscilloscopes, power meters, RF amps, etc.

Tuned UHF (400 MHz) Antenna and measure gain, antenna pattern test, OTA (Over The Air) and input matching of antenna.

Measured horn antenna for Ka-Band (26.8 GHz).

2012-2013 HMICRO (Title Senior RFIC Design Engineer), (Los Altos)

Designing transceiver for medical market based on Wifi and UWB technique, my responsibility was design receiver from antenna to ADC interface and 32kHz oscillator for standby mode to generate clock for digital and do layout work for some of blocks.

To prepare for testing we designed PCB and after testing of RF hardware works as expectation.

Tools:

RF Specter Cadence V6.1 to do simulation and extraction, ADS for system simulation (link budget simulation)

Frequency was 2.4GHz at RF and bandwidth of baseband 5MHz.

2011-2012 Pixel Sand Inc (Title Senior RFIC Design Engineer), (Fremont)

To design and perform a power amplifier 20dBm for Zigbee application with layout design at ADS. (Process: SOI tower Jazz) and design PCB for testing of PA.

To develop an efficient power Amplifier 30dBm for Zigbee application (Process: SiGe tower Jazz).

Tools:

ADS to do in/output matching and inter-stage matching, do momentum simulation for BALUN.

Frequency range was 2.4GHz.

209-2011 Aviacomm (Title Senior RFIC Design Engineer), (Sunyvale)

Developing Supper-Wifi. it covers from 300MHz to 3GHz for Google requirement. The design challenge was both in transmitter and receiver especially in so large Bandwidth, high requirement in linearity, dynamic gain rang, adaptive filtering . Most of the work was to improve linearity off transmitter stage and improve receiver noise figure in so wide bandwidth rage.

Tools:

RF Specter Cadence V6.1... to do simulation and extraction and layout, ADS for system simulation, linearity and EVM performance of transceiver (link budget simulation) and for testing of RFIC we designed PCB.

Frequency was from 300MHz to 3GHz at RF and bandwidth of baseband was adaptive from 1.25MHz to 10MHz.

2005-2009 UMC (Title Senior RFIC Design Engineer), (Sunnyvale),

To develop UWB transceiver. The transmitter blocks were: Power Amplifier with 16 dB dynamic range with P1dB compression of 4dBm, IQ modulator with LO-cancellation, LPF (3rd order Chebyshev gmC filter), Buffer and the band gap reference that deliver sufficient current and voltage to the LNA receiver, Modulator, LPF (5th order gmC filter), PGA (with DC offset cancelation), Buffer. The process was 0.13um UMC at 1.2Volts.gt

To test performance of IC we design PCB.

Accomplishment:

The first transmitter tapeout was successfully meeting measurement spec (measurement result can be present).

Receiver was functional %80 after first tapeout.

WiMAX-project: to design LNA, Mixer and PA in UMC process for validation of UMC’s process in 65nm. After tapeout all three blocks were packaged and measured and measurement result was successful (measurement result can be present).

Tools: Cadence, Spectres-RF, Extraction (Assura-RF, Calibre)

2000- 2005 Insilica, Inc. (Title: Senior Staff Engineer), (Long Beach)

Responsibility: transmitter and receiver (back-end) design for beam forming 802.11a,b,g.

Transmitter: to design a one stage power amplifier P1dB 10dBm with power control of 38dB, IQ Modulator with power control of 38dB, LPF (3rd order Chebyshev active RC low pass filter with automatic tuning for process variation), and a crystal oscillator (OSC).

To design Back End in receiver IQ modulator, LPF(5th order Chebyshev active RC low pass filter with automatic corner frequency tuning for process variation), and PGA

Accomplishment:

Completed transmitter test key and performed some probe measurements and results were very good.

Tools: Cadence, Specter-RF, Extraction (Assura-RF)

Process: TSMC 130nm.

1990- 2000 Ericsson Radio System AB (Title: Design Manager), (Stockholm, Sweden)

To design 10watts Power Amplifier BJT process for Europe market for frequency band from 800MHz to 950MHz.

Characterization of SiC transistor and methodology to design a Power Amplifier in SiC for frequency band from 800MHz to 950MHz.

To integrate most of the linearization of a power amplifier in SiGe BJT process for frequency band from 800MHz to 950MHz..

To design a linearization IC for EDGE power amplifier with other Ericsson team members (SiGe, BJT).

Most of design was base of active and passive component like SiGe, BJT, resistor, capacitor, inductor, microwave components, and …

Accomplishment:

To design the gain RF-Switch to switch between two synthesizer in GSM basestation; this design is in production (Ericsson BJT process).

Tools: Cadence, Specter-RF.

ADS (Advanced Design System).

To design and perform the linearization of a power amplifier

To develop an efficient means of RF power amplifier circuit for GSM, NMT and TACS products for European market.

Tools: Cadence, Specter-RF, extraction.

RELATED COURSES

EEsof Training Course

Diplomas from catena. (High Efficiency Amplifiers for Wireless Communications)

Power Amplifier Design on EEsof "E-Syn"

Radio Microwave and Mentor Graphics

ASIC Design on CADENCE

Electronic Circuit Design

Transmitters and Receiver Circuit Design for Wireless Communication

Specter-RF

HP ADS

Low Power analog and mixed-signal ICs

RELATED EXPERIENCE

Extensive experience in most kinds of lab instrumentation.

MCPA (Multi Carrier Power Amplifier) for use with 1.5GHz and 25Watt.

SWR Detector with temperature compensation.

ESD and Pad-Ring.

Passive, active and microwave component experience.

References Available Upon Request

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