Oscillator, electronic apparatus, and vehicle
AssigneeSeiko Epson Corporation
InventorKenji Hayashi
Life of this patent
Estimating the term…
Abstract
An oscillator includes an oscillation circuit, an operation state signal generation circuit that generates an operation state signal based on an operation state of the oscillation circuit, and a first integrated circuit, the oscillation circuit and the operation state signal generation circuit are disposed outside the first integrated circuit, and the first integrated circuit includes a first digital interface circuit, a D/A conversion circuit that converts a digital signal input via the first digital interface circuit into an analog signal to generate a frequency control signal that controls a frequency of the oscillation circuit, and a terminal to which the operation state signal is input.
Claims14
An oscillator comprising:
- a first integrated circuit comprising
- a first digital interface circuit,
- a D/A conversion circuit that converts a digital signal input via the first digital interface circuit into an analog signal to generate a frequency control signal, and
- a terminal to which an operation state signal is input;
- an oscillation circuit disposed outside of the first integrated circuit, the frequency control signal controlling a frequency of the oscillation circuit;
- an operation state signal generation circuit disposed outside of the first integrated circuit, that generates the operation state signal based on an operation state of the oscillation circuit;
- and
- a second integrated circuit including at least a part of the oscillation circuit and at least a part of the operation state signal generation circuit.
An oscillator comprising:
- a first integrated circuit comprising
- a first digital interface circuit,
- a D/A conversion circuit that converts a digital signal input via the first digital interface circuit into an analog signal to generate a frequency control signal, and
- a terminal to which an operation state signal is input;
- an oscillation circuit disposed outside of the first integrated circuit, the frequency control signal controlling a frequency of the oscillation circuit;
- an operation state signal generation circuit disposed outside of the first integrated circuit, that generates the operation state signal based on an operation state of the oscillation circuit;
- and
- a resonator, wherein
- the oscillation circuit oscillates the resonator, and
- the operation state signal is a signal representing whether or not temperature of the resonator is in a predetermined state.
An oscillator comprising:
- a first integrated circuit comprising
- a first digital interface circuit,
- a D/A conversion circuit that converts a digital signal input via the first digital interface circuit into an analog signal to generate a frequency control signal, and
- a terminal to which an operation state signal is input;
- an oscillation circuit disposed outside of the first integrated circuit, the frequency control signal controlling a frequency of the oscillation circuit;
- an operation state signal generation circuit disposed outside of the first integrated circuit, that generates the operation state signal based on an operation state of the oscillation circuit;
- and
- a first substrate on which the first integrated circuit is mounted, wherein
- the first substrate includes
- a digital interconnection electrically connected to the first digital interface circuit, and
- a shield pattern, and
- at least a part of the shield pattern overlaps the digital interconnection in a planar view of the first substrate.
Dependencies are inferred from the claim text.