Design varied Analog standard circuit blocks: bandgap, voltage regulators, amplifier/OTA, command/address receiver, VGA/CTLE datapath receiver for LPDDR4X, DDR4, and DDR5 DRAM memory.

•Analog IC IP design in 7nm LP Technology: current reference circuits, voltage reference, IDAC, a negativecapacitance circuit for 60G and/or 112G Serdes and performed EMIR, self-heating, and reliability analysis,and layout extraction.● Designed ultra-low power bandgrap (<1uA), voltage and current reference circuits for a medical device in55nm technology.● Designing fully-differential baseband transimpedance anti-aliasing filter and a logic frequency divider from2GHz to 500MHz with 25% duty cycle in 120nm CMOS RF technology.● Analog IC IP, such as LDO (voltage regulators), and bandgaps for DDR4 PHY integrated circuits with 14nmFinFet Technology.

• Designed an I2C interface with functions of built-in programmable gradual 8-bit/12-bit linear and exponential dimming for a white LED drivers within a boost converter.• Designed multi-strings white LED drivers with constant current sources and integrated within boost DC-DC converterso Designed and implemented a self-test function with digital logic and analog circuits in WLED driver and DC-DC convertero Designed a hysteretic buck DC-DC converter• Designed circuit cells including operational amplifiers, bandgap, voltage references/regulators (LDO), comparators, thermal shut down, LED drivers, oscillator, and logic circuit

• Designed a system of prognostics/fault-tolerant electronics in module and IC for military applications and NASA; • Defined products which also included designing, performing layout, evaluation, test, and release to production; worked closely with the principal design engineer, hardware engineer and software engineer• Designed circuit cells which included a 4-bit Flash ADC, op-amps, comparators, band gap and logic circuits, and used CMOS technology from TSMC and IBM for IC design

IC Analog Design Engineer, Power Management Team in Wireless divisionUsing BiCMOS and CMOS technology to design the analog audio processing circuits for electronic handheld products and wireless headsets. I was solely responsible for designing whole block of audio circuit. It is a full life cycle design from transistors level up to system level, including defines products and data sheets, design, layout, evaluation, test, and release products. I have designed audio linear amplifiers (class AB), low-passed active Filter and switch-capacitor filter, the audio volume controller, 555 Timer, oscillator, and microphone amplifier. And I work closely with a test engineer, and an application engineer so that they can understand well enough functionality of the audio circuits. Also working closely with a layout person and a lab technician.

3rd rotation, Advanced Module Integration & Development Lab. Device EngineeringPerformed device characterization and analysis, wafer inspection, identification of defect source, and root cause analysis for RF BiCMOS SiGe:C HBT, and CMOS. Performed data analysis for CMOS devices such as how oxide thickness affects threshold voltage and current, and how the inconsistent process results vary the HBT device parameters. 2nd rotation, Wireless & Broadband System GroupRF/IF division, DesignVerified and debugged the GSM transmitted digital core circuit in the multi-mode IC and SPI with using PowerMill/Nanosim software and verilog. Loaded and modified the verilog program code and setup the verilog codes to simulation. Doing IC evaluation set-up to obtain measuring data, testing IC, and programming IC with LabView. Designed and modified a transistor level of a clock modulator circuit to improve the performance.1st rotation, Wireless & Broadband System GroupImage Capture Operation, Analog DesignRan system level simulation of analog signal processor, which is associated with image sensor for digital camera, and writing script files. Performed evaluation of software tool to running simulation and verification of analog signal processor. Create and verify models for analog blocks to system level simulation in Verilog.

Writing application notes, making circuit layouts and Spice simulations, designing EMI/RFI filters in 1-2 GHz range, testing the devices with RF Network Analyzer, and describing and giving recommendation for ESD, EMC/EMI protection with transient voltage suppressor (TVS) arrays, thyristors, and bipolar discretes.