Constant-temperature piezoelectric oscillator and method of manufacturing the same
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United States of America Patent
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Apr 14, 2015
Grant Date -
Mar 13, 2014
app pub date -
Apr 5, 2013
filing date -
Mar 24, 2010
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Abstract
A constant-temperature piezoelectric oscillator includes: a piezoelectric vibrator; an oscillation circuit; a frequency voltage control circuit; a temperature control section; and an arithmetic circuit, wherein the temperature control section includes a temperature-sensitive element, a heating element, and a temperature control circuit, the frequency voltage control circuit includes a voltage-controlled capacitance circuit capable of varying the capacitance value in accordance with the voltage, and a compensation voltage generation circuit, and the arithmetic circuit makes the compensation voltage generation circuit generate a voltage for compensating a frequency deviation due to a temperature difference between zero temperature coefficient temperature Tp of the piezoelectric vibrator and setting temperature Tov of the temperature control section based on a frequency-temperature characteristic compensation amount approximate formula adapted to compensate the frequency deviation, and then applies the voltage to the voltage-controlled capacitance circuit to compensate the frequency.
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- 15 United States
- 10 France
- 8 Japan
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- 5 Korea
- 2 Other
Patent Owner(s)
- SEIKO EPSON CORPORATION
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- [Patents Count]
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Matsuoka, Jun | Minamisoma, JP | 14 | 59 |
Ogino, Akitoshi | Minamisoma, JP | 3 | 37 |
Oinuma, Yuichi | Minamisoma, JP | 3 | 37 |
Soga, Tadayoshi | Minamisoma, JP | 3 | 37 |
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