A 1.2-V Single-Sideband Upconverter System with High Spurious Suppression for UWB Frequency Synthesizers
Refereed conference paper presented and published in conference proceedings

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AbstractThis paper presents a precise single-sideband (SSB) upconverter system for use in UWB Mode 1 frequency synthesizers. A divide-by-two circuit and a notch filter are employed to generate accurate quadrature sinusoids at the required offset frequency with low harmonic distortion for precise SSB mixing. Double degeneration technique is applied to linearize the SSB upconverter for minimizing nonlinearities and unwanted spurs. Fabricated in a 0.18-mu m CMOS process, the SSB upconverter system achieves a high image rejection ratio of 50.2 dB at a low supply voltage of 1.2 V. The in-band and out-of-band spurious suppressions are at least 32 dB and 42 dB, respectively. Moreover, stable performance is obtained even under a 1-V supply.
All Author(s) ListTang SK, Pun KP, Chan CF
Name of ConferenceIEEE Radio Frequency Integrated Circuits Symposium (RFIC)
Start Date of Conference07/06/2009
End Date of Conference09/06/2009
Place of ConferenceBoston
Country/Region of ConferenceUnited States of America
Pages475 - 478
LanguagesEnglish-United Kingdom
KeywordsFrequency synthesizer; multi-band OFDM (MB-OFDM); single-sideband (SSB) upconverter; spurious suppression; ultra-wideband (UWB)
Web of Science Subject CategoriesEngineering; Engineering, Electrical & Electronic; Telecommunications

Last updated on 2021-12-09 at 00:03