VOLTAGE CONTROL TYPE TEMPERATURE COMPENSATION PIEZOELECTRIC OSCILLATOR
First Claim
1. A voltage control type temperature compensation piezoelectric oscillator, comprising:
- a voltage control type oscillation circuit;
an automatic frequency control (AFC) circuit outputting a control voltage for controlling an oscillation frequency of the voltage control type oscillation circuit based on an external control voltage;
a temperature compensation voltage generating circuit generating a temperature compensation voltage; and
a gain variable circuit varying a gain of the temperature compensation voltage, whereinthe gain variable circuit is controlled by the control voltage outputted from the AFC circuit, and the oscillation frequency of the voltage control type oscillation circuit is controlled by an output voltage of the gain variable circuit.
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Accused Products
Abstract
A voltage control type temperature compensation piezoelectric oscillator, includes: a voltage control type oscillation circuit; an automatic frequency control (AFC) circuit outputting a control voltage for controlling an oscillation frequency of the voltage control type oscillation circuit based on an external control voltage; a temperature compensation voltage generating circuit generating a temperature compensation voltage; and a gain variable circuit varying a gain of the temperature compensation voltage. In the oscillator, the gain variable circuit is controlled by the control voltage outputted from the AFC circuit, and the oscillation frequency of the voltage control type oscillation circuit is controlled by an output voltage of the gain variable circuit.
44 Citations
6 Claims
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1. A voltage control type temperature compensation piezoelectric oscillator, comprising:
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a voltage control type oscillation circuit; an automatic frequency control (AFC) circuit outputting a control voltage for controlling an oscillation frequency of the voltage control type oscillation circuit based on an external control voltage; a temperature compensation voltage generating circuit generating a temperature compensation voltage; and a gain variable circuit varying a gain of the temperature compensation voltage, wherein the gain variable circuit is controlled by the control voltage outputted from the AFC circuit, and the oscillation frequency of the voltage control type oscillation circuit is controlled by an output voltage of the gain variable circuit. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification