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An S-Band CMOS 6-Bit vector-sum phase shifter with low RMS phase error using frequency-to-voltage converter feedforward loop

Nobakht Sarkezeh, M ; Sharif University of Technology | 2020

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  1. Type of Document: Article
  2. DOI: 10.1142/S021812662050036X
  3. Publisher: World Scientific Publishing Co. Pte Ltd , 2020
  4. Abstract:
  5. In this paper, a wideband full-360o phase shifter with 6 bits of accuracy has been designed and simulated with minimal root mean square (RMS) phase error. The proposed phase shifter deployed a feed forward path including a frequency-to-voltage converter (FVC) to minimize the mismatch in quadrature generation to eventually reduce the RMS phase error for S-band (2-4GHz) applications. The designed phase shifter in 180nm CMOS technology achieves an RMS phase error in the range of 0.607-1.18? with -50dBm input signal over 2-4GHz frequency band. With lower input signal of -75dBm, the RMS phase error is 0.621-1.34? for 2-4GHz input frequency. The proposed phase shifter shows an RMS amplitude error less than 0.41dB over 2-4GHz frequency. The 1-dB compression point (P-1dB,CP) of the proposed phase shifter is -23dBm. The proposed wideband phase shifter draws 32 mA from 1.8 supply voltage. It occupies an active area of only 0.025mm2, due to active design without any inductor. © 2020 World Scientific Publishing Company
  6. Keywords:
  7. Feedforward loop ; Frequency-to-voltage converter ; Phase shifter ; Vector-sum ; Errors ; Feedforward loops ; Frequency to voltage converter (FVC) ; Frequency to voltage converters ; Quadrature generation ; Root mean square (rms) phase errors ; Vector sum ; Vector sum phase-shifters ; Wide-band ; Phase shifters
  8. Source: Journal of Circuits, Systems and Computers ; Volume 29, Issue 3 , 2020
  9. URL: https://www.worldscientific.com/doi/10.1142/S021812662050036X