Title :
A 800 μA, 105 MHz CMOS crystal-oscillator digitally trimmable to 0.3 ppm
Author :
Huang, Qiuting ; Basedau, Philipp
Author_Institution :
Integrated Syst. Lab., Swiss Federal Inst. of Technol., Zurich, Switzerland
Abstract :
A 105 MHz crystal oscillator consuming 800 μA at 1.7 V supply is described. The oscillator is part of a regulated system in a wireless device where the oscillation frequency is controlled digitally. This digital trimming of oscillation frequency is realized by binary capacitor banks of 10-bit resolution. The oscillator can be pulled from ±35 ppm to the required frequency with 0.3 ppm accuracy. The circuit has been fabricated in a 1 μm CMOS technology. The measured phase noise is -100 dBc/Hz at 100 Hz offset
Keywords :
CMOS analogue integrated circuits; circuit tuning; crystal oscillators; digital control; frequency control; variable-frequency oscillators; 1 micron; 1.7 V; 105 MHz; 800 muA; CMOS crystal-oscillator; binary capacitor banks; digital trimming; oscillation frequency control; phase noise; CMOS technology; Capacitors; Circuits; Control systems; Digital control; Frequency; Noise measurement; Oscillators; Phase measurement; Phase noise;
Conference_Titel :
ASIC Conference and Exhibit, 1996. Proceedings., Ninth Annual IEEE International
Conference_Location :
Rochester, NY
Print_ISBN :
0-7803-3302-0
DOI :
10.1109/ASIC.1996.552011
