Title :
The microprocessor compensated crystal oscillator-new developments
Author :
Jackson, Edward ; Rose, Brian
Author_Institution :
Q-Tech. Corp., Culver-City, CA, USA
Abstract :
New developments of the microprocessor controlled crystal oscillator (MCXO) include a factor-of-four size reduction, the addition of a second direct digital synthesizer (DDS) for frequency flexibility, development of new, smaller master crystals, and a major improvement of the output spectrum. The new design retains the basic features of the MCXO-a frequency temperature stability specification of +/- 3E-8, over -55 to +85 degrees centigrade, low power and fast warm-up time
Keywords :
compensation; crystal oscillators; direct digital synthesis; frequency stability; low-power electronics; -55 to 85 degC; direct digital synthesizer; frequency flexibility; frequency temperature stability specification; low power electronics; microprocessor compensated crystal oscillator; output spectrum; size reduction; warm-up time; Cities and towns; Filtering; Frequency synthesizers; Microprocessors; Oscillators; Phase locked loops; Phase noise; Smoothing methods; Stability; Temperature sensors;
Conference_Titel :
Frequency and Time Forum, 1999 and the IEEE International Frequency Control Symposium, 1999., Proceedings of the 1999 Joint Meeting of the European
Conference_Location :
Besancon
Print_ISBN :
0-7803-5400-1
DOI :
10.1109/FREQ.1999.840785
