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A 5 GHz quadrature relaxation oscillator with mixing for improved testability or compact front‐end implementation
Author(s) -
Oliveira Luis Bica,
van den Bos Chris,
Fernandes Jorge R.,
Verhoeven Chris J. M.,
Silva Manuel M.
Publication year - 2010
Publication title -
international journal of circuit theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.364
H-Index - 52
eISSN - 1097-007X
pISSN - 0098-9886
DOI - 10.1002/cta.562
Subject(s) - local oscillator , quadrature (astronomy) , testability , direct conversion receiver , relaxation oscillator , rf front end , phase noise , physics , intermediate frequency , mixing (physics) , electronic engineering , mathematics , radio frequency , electrical engineering , homodyne detection , engineering , voltage controlled oscillator , quantum mechanics , optics , statistics , voltage
We demonstrate by measurements on a test circuit that a 5 GHz relaxation oscillator with accurate quadrature outputs and low phase‐noise can be obtained, and that these favorable properties can be preserved while the mixing function is performed by this oscillator. This is useful either to measure the quadrature error at a low frequency, or to implement a low‐intermediate frequency (IF) or zero‐IF (homodyne) radio frequency front‐end. Copyright © 2008 John Wiley & Sons, Ltd.