Title :
A low mismatch symmetric charge pump for the application in PLLs
Author :
Zhang, Ye ; Zimmermann, Niklas ; Wunderlich, Ralf ; Heinen, Stefan
Author_Institution :
Dept. of Integrated Analog Circuits & RF Syst., RWTH Aachen Univ., Aachen, Germany
Abstract :
This paper proposes a charge pump with a symmetric structure that minimizes mismatch between charge and discharge currents and phase offset. The origins and influences of charge pump mismatch are discussed and theoretically analyzed. Subsequently the simulation results of the proposed charge pump are compared with conventional structures to show its benefits.
Keywords :
charge pump circuits; phase locked loops; PLL; charge currents; charge pump mismatch; discharge currents; low-mismatch symmetric charge pump; phase offset; symmetric structure; Charge pumps; Discharges; Phase frequency detector; Phase locked loops; Switches; Transistors; Voltage-controlled oscillators;
Conference_Titel :
Ph.D. Research in Microelectronics and Electronics (PRIME), 2011 7th Conference on
Conference_Location :
Trento
Print_ISBN :
978-1-4244-9138-4
Electronic_ISBN :
978-1-4244-9136-0
DOI :
10.1109/PRIME.2011.5966252
