Physical quantity detection circuit, physical quantity detection device, electronic apparatus, and vehicle
AssigneeSeiko Epson Corporation
InventorNoriyuki MURASHIMA
Life of this patent
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Abstract
A physical quantity detection device includes a switched capacitor filter circuit having a first sample-and-hold circuit adapted to sample and hold a first signal, which is based on an output signal of a physical quantity detection element, an amplifier circuit to which an output signal of the first sample-and-hold circuit is input, and a first switched capacitor circuit to which a first output signal of the amplifier circuit is input, wherein an output signal of the first switched capacitor circuit is input to the amplifier circuit, and an A/D conversion circuit adapted to perform an A/D conversion on an output signal of the switched capacitor filter circuit.
Claims20
A physical quantity detection circuit comprising:
- a switched capacitor filter circuit having a first sample-and-hold circuit adapted to sample and hold a first signal, which is based on an output signal of a physical quantity detection element, an amplifier circuit to which an output signal of the first sample-and-hold circuit is input, and a first switched capacitor circuit to which a first output signal of the amplifier circuit is input, wherein an output signal of the first switched capacitor circuit is input to the amplifier circuit;
- and
- an A/D conversion circuit adapted to perform an A/D conversion on an output signal of the switched capacitor filter circuit.
Dependencies are inferred from the claim text.