Title :
Issues in the Design and Simulation of a MEMS VCO based Phase-Locked Loop
Author :
Yellepeddi, Maneesha ; Mayaram, Kartikeya
Author_Institution :
Intel Corp., Austin, TX
Abstract :
The loop dynamics of a radio-frequency (RF) micro-electromechanical system (MEMS) based charge-pump phase-locked loop (CPLL) have been investigated using a continuous time analysis. This analysis reveals the bandwidth limitations of a PLL due to the MEMS varactor. A technique is presented to overcome the inherent low bandwidths by modifying the loop filter circuit. A 1.56GHz PLL is designed and simulated for a Global Positioning System (GPS) application using this technique
Keywords :
Global Positioning System; filters; micromechanical devices; oscillators; phase locked loops; varactors; 1.56 GHz; Global Positioning System; MEMS VCO design; MEMS varactor; charge-pump phase-locked loop; continuous time analysis; loop filter circuit; radiofrequency microelectromechanical system; Bandwidth; Charge pumps; Filters; Global Positioning System; Microelectromechanical systems; Micromechanical devices; Phase locked loops; Radio frequency; Varactors; Voltage-controlled oscillators;
Conference_Titel :
Circuits and Systems, 2007. ISCAS 2007. IEEE International Symposium on
Conference_Location :
New Orleans, LA
Print_ISBN :
1-4244-0920-9
Electronic_ISBN :
1-4244-0921-7
DOI :
10.1109/ISCAS.2007.378708
