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A polyphase filter based on CMOS inverters

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Author

Summary, in English

A new idea for generation of quadrature signals on chip is presented. The topology is based on a passive RC polyphase filter, where the resistive parts are made active by using inverters. The active filter combines quadrature generation, isolation, and gain without losing quadrature performance compared to a regular RC polyphase filter. The filter technique is demonstrated in a 10GHz front-end application where a broadband VCO drives an active polyphase filter to generate quadrature LO signals. By avoiding a quadrature VCO and tuned buffers, significant reductions in chip area are possible

Publishing year

2005

Language

English

Pages

12-15

Publication/Series

[Host publication title missing]

Document type

Conference paper

Publisher

IEEE - Institute of Electrical and Electronics Engineers Inc.

Topic

  • Electrical Engineering, Electronic Engineering, Information Engineering

Keywords

  • active filter
  • quadrature generation
  • 10 GHz
  • passive RC filter
  • tuned buffers
  • quadrature LO signals
  • voltage controlled oscillator
  • polyphase filter
  • CMOS inverters

Conference name

NORCHIP Conference, 2005

Conference date

2005-11-21 - 2005-11-22

Conference place

Oulu, Finland

Status

Published

ISBN/ISSN/Other

  • ISBN: 1-4244-0064-3