Title :
A new frequency comparator for using in fast charge pump PLLs
Author :
Sadeghi, Vahideh Sadat ; Naimi, Hossein Miar
Author_Institution :
Integrated Circuit Res. Lab., Babol Univ. of Technol., Babol, Iran
Abstract :
A bang-bang frequency comparator (BBFC) can be used in the feedthrough path in pump phase locked loops (CPPLL) to increase the locking speed. In this paper, we present a new structure which can be used as a BBFC and then show how this frequency comparator can decrease the settling time in a charge pump PLL. Simulations in Advanced Design System (ADS2008) using TSMC RF CMOS 0.18um confirm that applying the suggested BBFC can increase the locking speed significantly.
Keywords :
CMOS integrated circuits; comparators (circuits); phase locked loops; BBFC; CMOS; CPPLL; bang-bang frequency comparator; charge pump PLL; charge pump phase locked loops; locking speed; size 0.18 micron; Capacitors; Charge pumps; Frequency control; Frequency synthesizers; Phase locked loops; Radiation detectors; Time-frequency analysis; BBFC; Charge pump PLL; fast locking;
Conference_Titel :
Electrical Engineering (ICEE), 2013 21st Iranian Conference on
Conference_Location :
Mashhad
DOI :
10.1109/IranianCEE.2013.6599693
