Circuit device and oscillator
AssigneeSeiko Epson Corporation
InventorsTeppei Higuchi, Sho Matsuzaki, Yuichi Toriumi, Toshiya Usuda
Life of this patent
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Abstract
A circuit device includes: a first terminal and a second terminal coupled to a resonator; a third terminal; a fourth terminal; a first switch provided on a signal path between the first terminal and the third terminal; a second switch provided on a signal path between the second terminal and the fourth terminal; and a register configured to output a signal for controlling the first switch and the second switch to be turned on or off. In a first mode, the first switch and the second switch are turned off, a control signal is input to the third terminal, and a clock signal is output from the fourth terminal. In a second mode, the first switch and the second switch are turned on.
Claims7
A circuit device comprising:
- a first terminal and a second terminal coupled to a resonator;
- a third terminal;
- a fourth terminal to which a clock signal from an oscillation circuit is input;
- a first switch provided on a signal path between the first terminal and the third terminal;
- a second switch provided on a signal path between the second terminal and the fourth terminal;
- and
- a register configured to output a signal for controlling the first switch and the second switch to be turned on or off, wherein
- in a first mode, the first switch and the second switch are turned off, a control signal is input to the third terminal, and the clock signal is output from the fourth terminal, and
- in a second mode, the first switch and the second switch are turned on.
An oscillator comprising:
- a resonator;
- a circuit device coupled to the resonator;
- and
- a container accommodating the resonator and the circuit device, wherein
- the circuit device includes:
- a first terminal and a second terminal coupled to the resonator;
- a third terminal;
- a fourth terminal to which a clock signal from an oscillation circuit is input;
- a first switch provided on a signal path between the first terminal and the third terminal;
- a second switch provided on a signal path between the second terminal and the fourth terminal;
- and
- a register configured to output a signal for controlling the first switch and the second switch to be turned on or off,
- the container includes:
- a first external terminal coupled to the third terminal;
- and
- a second external terminal coupled to the fourth terminal,
- in a first mode, the first switch and the second switch are turned off, a control signal is input to the first external terminal, and the clock signal is output from the second external terminal, and
- in a second mode, the first switch and the second switch are turned on.
Dependencies are inferred from the claim text.