Title :
A Temperature-Compensated Digitally-Controlled Crystal Pierce Oscillator for Wireless Applications
Author :
Farahvash, Shayan ; Quek, Chee ; Mak, Monica
Author_Institution :
Sirenza Microdevices, San Jose, CA
Abstract :
In this paper, the DCXO is based on a Pierce oscillator with two MIM capacitor arrays for tuning the anti-resonant frequency of a 19.2MHz crystal. Each array of MIM capacitors is thermometer-coded and formatted in a matrix shape to facilitate layout. Although a segmented architecture is an area-efficient method for implementing a SC array, a thermometer-coded array provides the best linearity and guarantees a monotonic frequency tuning characteristic, which is of utmost importance in an AFC system.
Keywords :
BiCMOS digital integrated circuits; MIM devices; automatic frequency control; crystal oscillators; digital control; radiofrequency oscillators; thermometers; thin film capacitors; AFC system; MIM capacitor arrays; Pierce oscillator; antiresonant frequency tuning; digitally-controlled crystal oscillator; frequency 19.2 MHz; monotonic frequency tuning; segmented architecture; temperature compensation; thermometer-coded array; wireless applications; Automatic frequency control; Capacitors; Decoding; MOS devices; Resistors; Switches; Table lookup; Temperature sensors; Tuning; Voltage-controlled oscillators;
Conference_Titel :
Solid-State Circuits Conference, 2008. ISSCC 2008. Digest of Technical Papers. IEEE International
Conference_Location :
San Francisco, CA
Print_ISBN :
978-1-4244-2010-0
Electronic_ISBN :
978-1-4244-2011-7
DOI :
10.1109/ISSCC.2008.4523202
