Analog TCXO using cubic functional voltage generator

Author

Kurogo, S. ; Matsumoto, Y. ; Ohshima, T.

Author_Institution

Toyo Commun. Equipment Co. Ltd., Kanagawa, Japan

fYear

1996

fDate

5-7 Jun 1996

Firstpage

484

Lastpage

492

Abstract

This paper describes an indirect analog TCXO (Temperature-Compensated Crystal Oscillator) which has achieved a temperature compensation functioning much more accurately in view of the theoretical f-T behavior of crystal unit than those expected at present. This TCXO consists of two blocks. One is a temperature compensation circuit which fits in well with IC process, which outputs cubic functional variation of voltage with temperature (it consists of cubic and linear terms), while the other is VCXO (Voltage Controlled Crystal Oscillator), which has good linearity of frequency-control voltage characteristics (f-Vc characteristics). The TCXO achieved ±1[ppm]/-30~85[°C] (crystal resonator: ±25[ppm]/-30~85[°C]) in laboratory measurements. This paper discusses the device with an emphasis on its temperature compensation circuit

Keywords

compensation; crystal oscillators; analog TCXO; cubic functional voltage generator; f-T behavior; frequency-control voltage characteristics; temperature compensation circuit; temperature-compensated crystal oscillator; Circuits; Communication equipment; Frequency; Linearity; Phase modulation; Temperature sensors; Thermistors; Varactors; Voltage; Voltage-controlled oscillators;

fLanguage

English

Publisher

ieee

Conference_Titel

Frequency Control Symposium, 1996. 50th., Proceedings of the 1996 IEEE International.

Conference_Location

Honolulu, HI

Print_ISBN

0-7803-3309-8

Type

conf

DOI

10.1109/FREQ.1996.559899

Filename

559899