Title :
An Application of the Second-Order Passive Lead–Lag Loop Filter for Analog PLLs to the Third-Order Charge-Pump PLLs
Author :
Yao, Chia-Yu ; Yeh, Chin-Chih
Author_Institution :
Nat. Taiwan Univ. of Sci. & Technol., Taipei
Abstract :
A second-order passive lead-lag loop filter for analog phase-locked loop (PLLs) is modified in this paper for the third-order charge-pump PLLs (CPPLLs). The analysis shows that the CPPLL employing the modified loop filter results in smaller area, lower power consumption, or better noise performance than the CPPLL employing the conventional loop filter.
Keywords :
analogue circuits; passive filters; phase locked loops; analog phase-locked loop; second-order passive lead-lag loop filter; third-order charge-pump phase-locked loop; Capacitors; Charge pumps; Energy consumption; Frequency synthesizers; Low-frequency noise; Passive filters; Performance analysis; Phase locked loops; Transfer functions; Voltage-controlled oscillators; Charge-pump phase-locked loops; Charge-pump phase-locked loops (CPPLLs); frequency synthesizers; passive loop filters;
Journal_Title :
Industrial Electronics, IEEE Transactions on
DOI :
10.1109/TIE.2007.909082
