Title :
Differential charge pump circuit for high speed PLL application
Author :
Xue, Liqin ; Zhang, Zipeng
Author_Institution :
Coll. of Inf. Sci. & Eng., Shandong Univ. of Sci. & Technol., Qingdao, China
Abstract :
A high performance fully differential charge pump with reference voltage circuit was proposed to overcome the inevitable disadvantages in the traditional charge pump circuit, including leakage current, charged/discharge current mismatch and the output ripple. The phase errors and the spurious jump were reduced greatly, and the stability of the output was improved. The characteristics of wide swing range of output and low mismatch rate of currents of the charge pump met the high performance of high speed phase locked loop application requirement.
Keywords :
charge pump circuits; leakage currents; phase locked loops; reference circuits; charged/discharge current mismatch; differential charge pump circuit; fully differential charge pump; high speed PLL application; high speed phase locked loop application requirement; leakage current; output ripple; phase errors; reference voltage circuit; spurious jump; stability; Application software; Charge pumps; Circuits; Filters; Leakage current; Phase frequency detector; Phase locked loops; Switches; Voltage; Voltage-controlled oscillators; Charge pump; current matching; differential circuit; phase locked loop;
Conference_Titel :
Industrial Electronics & Applications, 2009. ISIEA 2009. IEEE Symposium on
Conference_Location :
Kuala Lumpur
Print_ISBN :
978-1-4244-4681-0
Electronic_ISBN :
978-1-4244-4683-4
DOI :
10.1109/ISIEA.2009.5356317