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US 8,427,244 B2Granted
Oscillation circuit and frequency-correcting oscillation circuit
AssigneeSeiko Epson Corporation
InventorsMasayuki Ishikawa, Kenasku Isohata, Takehiro Yamamoto
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Abstract
An oscillation circuit includes: an oscillator that includes a vibrator and outputs an oscillation signal; an F/V converter that converts the oscillation signal into a voltage corresponding to a frequency of the oscillation signal; and a memory circuit that stores frequency correcting information for correcting the frequency of the oscillation signal.
Claims7
An oscillation circuit comprising:
- an oscillator that includes a vibrator and outputs an oscillation signal;
- an F/V converter that converts the oscillation signal into a voltage corresponding to a frequency of the oscillation signal;
- a frequency divider that divides the frequency of the oscillation signal and that outputs a divided signal;
- and
- a memory circuit that stores frequency correcting information for correcting the frequency of the oscillation signal, wherein
- the divided signal is input to the F/V converter.
3 more elements
A frequency-correcting oscillation circuit comprising:
- an oscillator that includes a vibrator and outputs an oscillation signal;
- an F/V converter that converts the oscillation signal into a voltage corresponding to a frequency of the oscillation signal;
- a frequency divider that divides the frequency of the oscillation signal and that outputs a divided signal;
- a memory circuit that stores frequency correcting information for correcting the frequency of the oscillation signal;
- and
- a frequency correcting circuit that corrects the frequency of the oscillation signal on the basis of the output voltage of the F/V converter and the frequency correcting information, wherein
- the divided signal is input to the F/V converter.
4 more elements
Dependencies are inferred from the claim text.