Patents by Inventor Tadayoshi SOGA

Tadayoshi SOGA has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Constant-temperature piezoelectric oscillator and method of manufacturing the same
    Patent number: 9007134
    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 t
    Type: Grant
    Filed: April 5, 2013
    Date of Patent: April 14, 2015
    Assignee: Seiko Epson Corporation
    Inventors: Jun Matsuoka, Tadayoshi Soga, Akitoshi Ogino, Yuichi Oinuma
  • Piezoelectric oscillation circuit and temperature-constant piezoelectric oscillator
    Patent number: 8823462
    Abstract: A piezoelectric oscillation circuit includes: a Colpitts oscillation circuit; a first circuit unit which includes a circuit having a variable-capacity capacitor for controlling an oscillation frequency; a second circuit unit which includes a circuit having a resistance; and a piezoelectric resonator which includes a first terminal connected to the first circuit unit and the second circuit unit, and a second terminal connected to the Colpitts oscillation circuit. The Colpitts oscillation circuit connects the second terminal to a fixed potential via a dividing resistance. The second circuit unit connects the first terminal to the fixed potential via the resistance.
    Type: Grant
    Filed: September 7, 2011
    Date of Patent: September 2, 2014
    Assignee: Seiko Epson Corporation
    Inventors: Akitoshi Ogino, Tadayoshi Soga, Jun Matsuoka, Yuichi Oinuma
  • Constant-temperature piezoelectric oscillator and method of manufacturing the same
    Patent number: 8482356
    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 t
    Type: Grant
    Filed: February 14, 2011
    Date of Patent: July 9, 2013
    Assignee: Seiko Epson Corporation
    Inventors: Jun Matsuoka, Tadayoshi Soga, Akitoshi Ogino, Yuichi Oinuma
  • PIEZOELECTRIC OSCILLATION CIRCUIT AND TEMPERATURE-CONSTANT PIEZOELECTRIC OSCILLATOR
    Publication number: 20120105164
    Abstract: A piezoelectric oscillation circuit includes: a Colpitts oscillation circuit; a first circuit unit which includes a circuit having a variable-capacity capacitor for controlling an oscillation frequency; a second circuit unit which includes a circuit having a resistance; and a piezoelectric resonator which includes a first terminal connected to the first circuit unit and the second circuit unit, and a second terminal connected to the Colpitts oscillation circuit. The Colpitts oscillation circuit connects the second terminal to a fixed potential via a dividing resistance. The second circuit unit connects the first terminal to the fixed potential via the resistance.
    Type: Application
    Filed: September 7, 2011
    Publication date: May 3, 2012
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Akitoshi OGINO, Tadayoshi SOGA, Jun MATSUOKA, Yuichi OINUMA
  • CONSTANT-TEMPERATURE PIEZOELECTRIC OSCILLATOR AND METHOD OF MANUFACTURING THE SAME
    Publication number: 20110234328
    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 t
    Type: Application
    Filed: February 14, 2011
    Publication date: September 29, 2011
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Jun MATSUOKA, Tadayoshi SOGA, Akitoshi OGINO, Yuichi OINUMA