RF Experience

  • RF architecture design, circuit design, physical implementation
  • Many wireless standards, including Bluetooth, 802.11a/b/g, 2G/3G EDGE/GPRS, WCDMA, TDSCDMA, LTE
  • Many standard CMOS and RF processes
    • CMOS 250nm down to 40nm
    • Bipolar, BiCMOS, SiGe
  • WCDMA/TDSCDMA/linear GGE/GMSK 3G TX subsystem (90nm CMOS)
  • Designs of RX LNAs, mixers, TX upconverters, modulators, mixers, high-speed dividers, VCOs, quadrature generation circuits, standard analog blocks
  • GPS receiver
  • Filters
    • Continuous-time, tuned, receive channel select filter with a 10-MHz 3dB frequency
    • 2-MHz, tuned, polyphase channel select filter
    • Fifth-order filter IF circuits with low power, low noise and low distortion
    • Transmit filter for a direct up-conversion power amplifier
  • Modulators and demodulators
    • Ultra-low-power, low 1/f noise, quadrature mixer and LO driver for 2.4- GHz band
    • CATV mixer and programmable step attenuator for down-converter and up-converter (OpenCable & DOCSIS standards)
  • 2.4-GHz single-chip Bluetooth SoC (180nm)
    • Built complete RF transceiver design
    • One of the first to achieve certification for 180-nm CMOS single-chip
    • High-volume production for top-tier PDA manufacturer
  • Low-noise amplifier IC for satellite handset receiver (90nm)
    • 0.8-dB noise figure
    • 2.5-GHz band
  • Broadband low-noise amplifier IC for television tuner (proprietary IDM process)
    • 2-dB noise figure
    • 700-MHz broadband capability
  • CATV tuner and dual frequency synthesizer IC (SiGe)
    • Three low-phase-noise VCOs (1 to 2-GHz)
    • Prescaler (DC to 2.5-GHz)
    • LNA
    • Mixer and programmable step attenuator for up-/down-converters
    • Digital pretune control of VCO bands
  • 1.575-GHz LNA (180nm)
    • NF of 1.4-dB
    • Power gain of 15-dB
  • PLL demodulator for ultra-low-power Key-Fob solution (180nm)
  • Single-chip 4th-order SD fractional-N PLL (proprietary process)
    • 1-nHz resolution synthesizer
    • Output range 10-MHz to 3.2-GHz
  • Dual-channel receiver and FM demodulator for GSM, CDMA and PCS (proprietary process)
    • 150-MHz to 3-GHz RF
    • Incorporating VCO, amps, prescaler, programmable dividers, mixers, switched filters, variable gain amps, RF step attenuators
  • Broadband I/Q modulator GaAs MMIC (proprietary process)
    • 2 to 20-GHz operation
    • Based on Gilbert cell mixers