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Designs

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• Transceivers
   
  • RFID
  • Bluetooth
  • Zigbee
  • DECT
  • WLAN
     
• Synthesizer design
   
  • Pre-study: Fractional-N Closed loop modulation for DECT
  • 5 GHz LC-VCO
  • 2.5 GHz dual modulus prescaler (16/17)
  • 2.5 GHz multi modulus prescaler (16/17..30/31)
  • Phase frequency detector
    • 3 - state, 40 MHz
    • 5 - state, 40 MHz
  • Charge pump, 1 ns min. on time, 300/600 uA
  • VCO based Clock multiplier, 300 MHz
  • 3.0 - 6.0 GHz Differential ring oscillator + PVT core and fine tuning
     
• Crystal oscillator design
   
  • Low power Clapp oscillator, 50 uA
  • Digital controlled crystal oscillator (DCXO)  
     
• Low power oscillator design
   
  • RC-oscillator 
     
• AD/DA conversion
   
  • RDAC
  • Current steering DAC
  • SDM
    • 3^rd order, 20 kHz
    • 5^th order, 38 kHz
  • 6-bit SA ADC 
     
• Amplifiers
   
  • Video amplifier
  • Headphone amplifier
  • Operational transconductance amplifiers (OTA)
  • Programable gain amplifier
  • Microphone amplifier 
     
• References
   
  • Bandgap
  • Current reference with temperature compensation
  • Low noise, high supply ripple rejection current source for LC-VCO 
     
• Power management
   
  • Pre-study: Step down converter
  • LDO 
  • SMPS
     
• MEMS
  • High Voltage Driver IC
  • Charge pump
  • Buck down-converter
     
• Top-level
   
  • Definition
  • Supply strategy
  • Padring and ESD protection
  • Integration