Oscillators – With device responsive to external physical condition – Temperature or light responsive
Patent
1996-05-23
1997-09-16
Mis, David
Oscillators
With device responsive to external physical condition
Temperature or light responsive
331116FE, 331158, 331176, 331177V, 310315, H03B 504, H03B 536
Patent
active
056685068
ABSTRACT:
In a digital temperature compensated crystal oscillator, ADC circuit and DAC circuit are combined into a data conversion circuit which comprises a first section for DA conversion, a second section for converting an analog temperature voltage signal into a digital form in cooperation with the first section, and a third section for supplementing the DA conversion of the first section and thereby generating an analog control voltage for a VCO from a digital temperature compensation data. There is further provided a switch circuit for connecting the output of the first section to either of the second and third section.
REFERENCES:
patent: 5341112 (1994-08-01), Haman
patent: 5355098 (1994-10-01), Iwasaki
patent: 5548252 (1996-08-01), Watanabe et al.
Hayashi Mutsuo
Matsui Takashi
Matsumoto Kazunari
Nishimori Eiji
Tsuchiya Chikara
Fujitsu Limited
Kabushiki Kaisha Meidensha
Mis David
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