Dr Nigel Greer RF/Analog IC Designer

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circuits
Receivers
  • NZIF (polyphase) and ZIF architectures
  • LNAs, mixers, polyphase filters, limiters, AGCs, FM demodulators
  • Transmitters
  • Direct conversion, open-loop and offset-loop
  • prePAs, real and complex mixers, PGAs, LO calibration
  • Frequency synthesizers
  • Fractional-N and integer-N
  • prescalars, phase detectors, charge pumps, VCOs
  • Switched capacitor circuits
  • Filters, ADCs, DACs, modulators, PGAs
  • Continuous time filters
  • gm-C and active RC filters
  • automatic frequency tuning loops
  • Analog circuits
  • Opamps, OTAs, comparators
  • Bandgap references