Design of a CMOS Adaptive Charge Pump with Dynamic Current Matching
A novel structure for a charge pump circuit is proposed, in which the charge-pump (CP) current can adaptively regulated according to phase-locked loops (PLL) frequency synthesis demand. The current follow technology is used to make perfect current matching characteristics, and the two differential i...
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Published in | Wuhan University journal of natural sciences Vol. 11; no. 2; pp. 405 - 408 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Institute of Pattern Recognition and Artifical Intelligence, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China%Institute of Pattern Recognition and Artifical Intelligence, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China
01.03.2006
Xi'an Microelectronic Technology Institute, Xi'an 710054, Shaanxi, China Department of Electronic Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China%Institute of Pattern Recognition and Artifical Intelligence, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China |
Subjects | |
Online Access | Get full text |
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Summary: | A novel structure for a charge pump circuit is proposed, in which the charge-pump (CP) current can adaptively regulated according to phase-locked loops (PLL) frequency synthesis demand. The current follow technology is used to make perfect current matching characteristics, and the two differential inverters are implanted to increase the speed of charge pump and decrease output spur due to theory of low voltage difference signal. Simulation results, with 1st silicon 0. 25μm 2. 5 V complementary metal-oxide-semiconductor (CMOS) mixed-signal process, show the good current matching characteristics regardless of the charge pump output voltages. |
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Bibliography: | phase offset TP331 phase-locked loop phase frequency detector low voltagedifference signal charge pump current matching 42-1405/N phase-locked loop; charge pump; phase offset;phase frequency detector; current matching;low voltagedifference signal ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 1007-1202 1993-4998 |
DOI: | 10.1007/BF02832132 |