Title :
A monolithic 6 GHz quadrature frequency doubler with adjustable phase offset
Author :
Leifso, Curtis ; Nisbet, John
Author_Institution :
Engim Canada Inc., Ottawa, Ont., Canada
Abstract :
A 6 GHz frequency doubler with quadrature outputs generated from a differential single phase input is presented. The phase offset between the in-phase and quadrature outputs can be digitally controlled in linear steps for use in an automated calibration algorithm. The design nominally achieves standard deviations in quadrature phase error and amplitude balance of 0.4° and 0.1dB, respectively. This is demonstrated with a single sideband (SSB) mixer that realizes an average uncalibrated sideband rejection of 48.2 dB which improves to 55.8 dB post-calibration under nominal conditions.
Keywords :
frequency multipliers; microwave circuits; microwave frequency convertors; microwave mixers; phase noise; 6 GHz; adjustable phase offset; amplitude balance; automated calibration algorithm; differential single phase input; in-phase output; quadrature frequency doubler; quadrature outputs; quadrature phase error; single sideband mixer; uncalibrated sideband rejection; Calibration; Circuit optimization; Frequency conversion; Frequency synthesizers; Injection-locked oscillators; Interference; Phase noise; Radio frequency; Voltage-controlled oscillators; Wireless LAN; Frequency conversion; mixers; phase noise; phase shifters; tranceivers; wireless LAN;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2005.862338
