Temperature-controlled crystal oscillating unit and crystal oscillator

A temperature-controlled crystal oscillating unit, including a crystal plate having two surfaces on which electrodes are disposed thereon;

• a heater, for heating the crystal plate;
• and a sensor, for detecting a temperature of the crystal plate, the temperature-controlled crystal oscillating unit comprising:
• a crystal blank, further comprising:
• the crystal plate;
• an outer region, formed for surrounding a periphery of the crystal plate;
• and
• a connection portion, disposed for connecting the crystal plate with the outer region,
• wherein on the crystal blank, the heater and the sensor are disposed to surround a periphery of the electrode on one surface or the other surface of the crystal plate,
• the electrodes, the heater and the sensor are connected to terminals on the outer region by leads respectively, and
• the crystal blank is a one-side-holding type, wherein the connection portion is disposed on one side of the crystal plate.

A temperature-controlled crystal oscillating unit, including a crystal plate having two surfaces on which electrodes are disposed thereon;

• a heater, for heating the crystal plate;
• and a sensor, for detecting a temperature of the crystal plate, the temperature-controlled crystal oscillating unit comprising:
• a crystal blank, further comprising:
• the crystal plate;
• an outer region, formed for surrounding a periphery of the crystal plate;
• and
• a connection portion, disposed for connecting the crystal plate with the outer region,
• wherein on the crystal blank, the heater and the sensor are disposed to surround a periphery of the electrode on one surface or the other surface of the crystal plate,
• the electrodes, the heater and the sensor are connected to terminals on the outer region by leads respectively, and
• the crystal blank is clamped between two silicon plates, each of which has a concave thereon, and is vacuum bonded in a state of being accommodated in the concaves of the silicon plates.

A crystal oscillator, comprising:

• the temperature-controlled crystal oscillating unit, including a crystal plate having two surfaces on which electrodes are disposed thereon;
• a heater, for heating the crystal plate;
• and a sensor, for detecting a temperature of the crystal plate, the temperature-controlled crystal oscillating unit comprising:
• a crystal blank, further comprising:
• the crystal plate;
• an outer region, formed for surrounding a periphery of the crystal plate;
• and
• a connection portion, disposed for connecting the crystal plate with the outer region,
• wherein on the crystal blank, the heater and the sensor are disposed to surround a periphery of the electrode on one surface or the other surface of the crystal plate,
• the electrodes, the heater and the sensor are connected to terminals on the outer region by leads respectively;
• an oscillating circuit;
• and
• a temperature control circuit,
• wherein a variable-capacitive diode, disposed at an input side of the oscillating circuit, is disposed on the crystal plate of the temperature-controlled crystal oscillating unit.

A crystal oscillator, comprising:

• the temperature-controlled crystal oscillating unit, including a crystal plate having two surfaces on which electrodes are disposed thereon;
• a heater, for heating the crystal plate;
• and a sensor, for detecting a temperature of the crystal plate, the temperature-controlled crystal oscillating unit comprising:
• a crystal blank, further comprising:
• the crystal plate;
• an outer region, formed for surrounding a periphery of the crystal plate;
• and
• a connection portion, disposed for connecting the crystal plate with the outer region,
• wherein on the crystal blank, the heater and the sensor are disposed to surround a periphery of the electrode on one surface or the other surface of the crystal plate,
• the electrodes, the heater and the sensor are connected to terminals on the outer region by leads respectively, wherein the leads are formed on the connection portion;
• an oscillating circuit;
• and
• a temperature control circuit,
• wherein a variable-capacitive diode, disposed at an input side of the oscillating circuit, is disposed on the crystal plate of the temperature-controlled crystal oscillating unit.