DocumentCode
1812701
Title
A crystal oscillator with automatic amplitude control and digitally controlled pulling range of ±100 ppm
Author
Balan, Vishnu ; Pan, Tzuwang
Volume
5
fYear
2002
fDate
2002
Abstract
In this paper we report a digitally controlled crystal oscillator (DCXO) at 32.000 MHz. The circuit has an automatic control circuit to ensure that the voltage at the two crystal pins is always above ground, thereby avoiding waveform-clamping by ESD diodes. The stable amplitude keeps the power dissipation in the external crystal well controlled. The circuit also includes a digital tuning scheme to pull the crystal frequency by ±100 ppm around the center frequency with a 0.45 ppm/step resolution.
Keywords
circuit tuning; crystal oscillators; digital control; phase noise; 32.000 MHz; automatic amplitude control; center frequency; digital tuning scheme; digitally controlled crystal oscillator; digitally controlled pulling range; power dissipation; Automatic control; Automatic voltage control; Circuits; Digital control; Diodes; Electrostatic discharge; Frequency; Oscillators; Pins; Power dissipation;
fLanguage
English
Publisher
ieee
Conference_Titel
Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on
Print_ISBN
0-7803-7448-7
Type
conf
DOI
10.1109/ISCAS.2002.1010740
Filename
1010740
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