Abstract: An object of the invention is to provide an oven controlled crystal oscillator that prevents a reduction in characteristics due to temperature rise in the crystal vibrator and circuit elements other than the oscillating stage, and that increases energy efficiency of a heater element, to thereby facilitate temperature control.

Abstract: An object of the invention is to provide an oven controlled crystal oscillator that prevents a reduction in characteristics due to temperature rise in the crystal vibrator and circuit elements other than the oscillating stage, and that increases energy efficiency of a heater element, to thereby facilitate temperature control.

Abstract: A lead wire led-out type crystal oscillator of constant temperature type for high stability is disclosed, which includes 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. The heat supply body includes 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.

Abstract: A lead wire led-out type crystal oscillator of constant temperature type for high stability is disclosed, which includes 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. The heat supply body includes 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.

Abstract: A lead wire led-out type crystal oscillator of constant temperature type for high stability is disclosed, which includes 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. The heat supply body includes 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.

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

Abstract: In a coordinate input device including a coordinate input unit and a coordinate indicator which comprises a winding and is movable on the coordinate input unit, an oscillation generator generates an oscillation signal. Connected to the oscillation generator, a capacitor produces the oscillation signal as an output oscillation signal. When the output oscillation signal is supplied to the winding without failure, the coordinate input unit produces an electrical signal. A superposing circuit superposes the electrical signla on the output oscillation signal to produce a superposed signal. An envelope detector detects an envelope of the superposed signal to produce an envelope signal indicative of a location of the coordinate indicator on the coordinate input unit. A calculating circuit uses the envelope signal in calculating the location as a calculated location. An output oscillation detector detectes the output oscillation signal to produce a detection signal.