Title: Constant temperature type crystal oscillator
Application Number: 200510070833 Application Date: 2005.05.19
Publication Number: 1700589 Publication Date: 2005.11.23
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H03B5/04;H03B5/32;G05D23/24
Applicant(s) Name: Nihon Dempa Kogyo Co. Address:
Inventor(s) Name: Fukuda Minoru;Ito Manabu;Kudo Tetuo;Uchida Takeshi
Attorney & Agent: cheng wei
Abstract:
    The present invention is one where, in a lead wire led-out type crystal oscillator of constant temperature type for high stability, comprising: a heat supply body that supplies heat to a crystal resonator from which a plurality of lead wires are led out, to maintain the temperature constant; an oscillating element that constitutes an oscillating circuit together with the crystal resonator; a temperature control element that constitutes a temperature control circuit for controlling the temperature of the crystal resonator; and a circuit board for mounting the heat supply body, the oscillating element, and the temperature control element, and through which lead wires of the crystal resonator are passed through for mounting, the heat supply body comprises: a heat conducting plate which has through-holes for the lead wires and is mounted on the circuit board, and which faces, and is directly thermally joined to, the crystal resonator; and a chip resistor for heating which is mounted on the circuit board adjacent to the heat conducting plate, and is thermally joined to the heat conducting plate.
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