Design of a CMOS Adaptive Charge Pump with Dynamic Current Matching

Verfasser / Beitragende:
ZOU Xuecheng; ZHANG Tao; ZHAO Guangzhou; SHEN Xubang
Ort, Verlag, Jahr:
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, 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,
Zeitschriftentitel:
Wuhan University journal of natural sciences, Jg. 11; H. 2; S. 405 - 408
Format:
Journal Article
Online Zugang:
get it
SFX Services
ID: FETCH-wanfang_journals_whdxxb_e2006020193

TP331; 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 0.25 μm 2.5 V complementary metal-oxide-semiconductor (CMOS) mixed-signal process, show the good current matching characteristics regardless of the charge pump output voltages.

Wuhan University journal of natural sciences

phase offset; phase-locked loop; phase frequency detector; charge pump; current matching; low voltage difference signal