A dual-T quartz crystal resonator circuit and its application to 10MHz oscillator

Author

Adachi, Takehiko ; Akamatsu, Daisuke ; Hirama, Koichi ; Nakagawa, Yasuhiko ; Yanagisawa, Takeshi

Author_Institution

Fac. of Eng., Yokohama Nat. Univ., Yokohama

fYear

2008

fDate

19-21 May 2008

Firstpage

229

Lastpage

232

Abstract

In this paper, we have proposed a dual-T quartz crystal resonator circuit of which its resonance frequency can be changed a several thousand ppm exceeding the limit of the piezoelectric coupling factor of a crystal resonator. We have made the measurement of the frequency characteristics of the proposed dual-T circuit composed of 9.995 MHz and 10.005 MHz crystal resonators having the same quality factors. The dual-T circuit showed a single resonant not filter characteristics. And the resonance frequency could be changed about 1000 ppm between the resonance frequencies of the two crystal resonators. We have made an oscillator using the dual-T circuit and measured its performance, too. The variable range about 1000 ppm of the oscillation frequency was observed.

Keywords

Q-factor; crystal oscillators; dual-T quartz crystal resonator circuit; frequency 10 MHz; frequency 10.005 MHz; frequency 9.995 MHz; oscillator; piezoelectric coupling factor; quality factors; resonance frequency; Capacitance; Coupling circuits; Equivalent circuits; Frequency measurement; Q factor; RLC circuits; Resonance; Resonant frequency; Resonator filters; Voltage-controlled oscillators;

fLanguage

English

Publisher

ieee

Conference_Titel

Frequency Control Symposium, 2008 IEEE International

Conference_Location

Honolulu, HI

ISSN

1075-6787

Print_ISBN

978-1-4244-1794-0

Electronic_ISBN

1075-6787

Type

conf

DOI

10.1109/FREQ.2008.4622995

Filename

4622995