Design of a high-speed low-voltage (1V) charge-pump for wideband phase-locked loops

Author

Magnusson, Håkun ; Olsson, Håkan

Author_Institution

Radio Electron.-LECS/IMIT, R. Inst. of Technol., Kista, Sweden

Volume

1

fYear

2003

fDate

14-17 Dec. 2003

Firstpage

148

Abstract

We have designed a new low voltage differential charge-pump for wideband phase-locked loops (PLL). The charge-pump operates at 500 MHz with a supply voltage of 1 V. The differential output voltage range of the cross-coupled charge-pump is 1.4 V. Improved current matching resulted in reduced reference spur levels at the PLL output. Simulations of a PLL showed spurious levels below -88 dBc. The circuit is implemented in a 0.18μm CMOS process.

Keywords

CMOS integrated circuits; frequency synthesizers; high-speed integrated circuits; low-power electronics; phase locked loops; voltage-controlled oscillators; 1 V; 500 MHz; CMOS process; cross-coupled charge-pump; current mirrors; differential output voltage range; frequency synthesizer; high-speed charge-pump; improved current matching; low voltage differential charge-pump; phase offset; reduced reference spur levels; wideband phase-locked loops; Bandwidth; Charge pumps; Circuit simulation; Frequency synthesizers; Leakage current; Phase locked loops; Phase noise; Timing; Voltage; Wideband;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics, Circuits and Systems, 2003. ICECS 2003. Proceedings of the 2003 10th IEEE International Conference on

Print_ISBN

0-7803-8163-7

Type

conf

DOI

10.1109/ICECS.2003.1301998

Filename

1301998