NDLI: A circular voltage-controlled phase shifter with unlimited phase range for phase tracking loops

Content Provider	IEEE Xplore Digital Library
Author	Byungjin Chun Zheyao Zhang Lidholm, S.
Copyright Year	2007
Description	Author affiliation: Dept. of Microelectron. Eng., Univ. Coll. Cork, Cork (Byungjin Chun; Zheyao Zhang; Lidholm, S.)
Abstract	A circular voltage-controlled phase shifter (VCPS) is proposed to extend the range of the controlled output phase shift unlimitedly. This is made possible by configuring the system to operate in a circular way, differently from the conventional VCPS whose output phase saturates as the phase control input exceeds some value. The circular VCPS is based on a vector modulation method whose modulation signals are generated in a pseudo-sinusoidal way exploiting the current-voltage (I-V) curve of a MOS differential amplifier pair. When the circular VCPS is employed in phase tracking loops, the loop can operate in a stand-alone way thanks to its unlimited phase shifting capability.
Starting Page	579
Ending Page	582
File Size	330669
Page Count	4
File Format	PDF
ISBN	9781424413416
DOI	10.1109/ECCTD.2007.4529662
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-08-27
Publisher Place	Spain
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Tracking loops Baseband Phase modulation Phase shifters RF signals Phase control Control systems Differential amplifiers Voltage control Phase locked loops
Content Type	Text
Resource Type	Article

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A circular voltage-controlled phase shifter with unlimited phase range for phase tracking loops