CMOS integrated commutated circuits for interference filtering at radio-frequency
Sha, Mengze
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https://hdl.handle.net/2142/113093
Description
Title
CMOS integrated commutated circuits for interference filtering at radio-frequency
Author(s)
Sha, Mengze
Issue Date
2021-07-22
Director of Research (if dissertation) or Advisor (if thesis)
Zhou, Jin
Department of Study
Electrical & Computer Eng
Discipline
Electrical & Computer Engr
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
M.S.
Degree Level
Thesis
Keyword(s)
Interference
commutated capacitors
mixer-first receiver
high linearity
N-path filter
linear periodically time-variant (LPTV) circuit
Abstract
Two ways of interference filtering, namely mixer-first receiver with acoustic filter load and N-path low pass filter (LPF), are presented and verified. The passive mixer-first architecture provides high linearity and reconfigurability. The acoustic load at intermediate frequency ensures good selectivity. Thereceiver operates at 3.5-to-6.2 GHz and achieves IIP3 of >+27 dBm at 1xBW offset with a minimum NF of 9.7 dB in measurement. For the N-path LPF, a mathematical analysis on N-path LPF is given, and a good match between theoretical plots and Cadence simulation is reported.
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