Title :
A new digitally temperature compensated crystal oscillator for a mobile telephone system
Author :
Miyayama, T. ; Ikeda, Y. ; Okano, S.
Author_Institution :
Toyo Commun. Equipment Co. Ltd., Kanagawa, Japan
Abstract :
A detailed description is given of the DTCXO designed for mobile telephone system applications for which it is essential to have a narrower channel spacing. The authors have used a polynomial interpolation technique to achieve a DTCXO with a high frequency-temperature stability within ±0.3 p.p.m. The compact (4 cm3), low-power-consumption (15 mW) DTCXO has been developed by using a flat-packaged CMOS gate array in the circuit of the digital unit
Keywords :
CMOS integrated circuits; circuit CAD; crystal resonators; frequency stability; interpolation; mobile communication systems; polynomials; radiotelephony; channel spacing; circuit CAD; digitally temperature compensated crystal oscillator; flat-packaged CMOS gate array; high frequency-temperature stability; mobile telephone system; polynomial interpolation; Channel spacing; Energy consumption; Frequency; Interpolation; Oscillators; PROM; Stability; Telephony; Temperature distribution; Temperature sensors;
Conference_Titel :
Frequency Control Symposium, 1988., Proceedings of the 42nd Annual
Conference_Location :
Baltimore, MD
DOI :
10.1109/FREQ.1988.27620
