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US 2019/0293424 A1Published application
Circuit device, physical quantity measurement device, electronic apparatus, and vehicle
AssigneeSeiko Epson Corporation
InventorHideo HANEDA
Life of this patent
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Abstract
A circuit device includes a detection signal terminal to which a detection signal from a vibrator is input, a digital signal terminal that performs at least one of an input and an output of a digital signal, a detection circuit, and a signal generation circuit that generates a noise reduction signal based on the digital signal. The detection circuit includes an amplification circuit that amplifies the detection signal. The amplification circuit performs addition processing of a signal obtained by amplifying the detection signal and the noise reduction signal.
Claims20
A circuit device comprising:
- a detection signal terminal to which a detection signal from a vibrator is input;
- a digital signal terminal that performs at least one of an input and an output of a digital signal;
- a signal generation circuit that generates, based on the digital signal, a noise reduction signal for reducing noise of the detection signal;
- and
- a detection circuit includes
- an amplification circuit which amplifies the detection signal and performs addition processing of a signal which is obtained by amplifying the detection signal, and the noise reduction signal and
- a synchronization detection circuit which performs detection processing for an output signal of the amplification circuit, and
- the detection circuit detects a physical quantity signal based on an output signal of the synchronization detection circuit.
5 more elements
A circuit device comprising:
- a detection signal terminal to which a detection signal from a vibrator is input;
- first to kth communication signal terminals that perform at least one of an input and an output of first to kth communication signals, k being an integer greater than or equal to 2;
- an interface circuit that performs interface processing, based on the first to kth communication signals;
- a signal generation circuit that generates, based on the first to kth communication signals, a noise reduction signal for reducing noise of the detection signal;
- and
- a detection circuit includes
- an amplification circuit which amplifies the detection signal and performs addition processing of a signal which is obtained by amplifying the detection signal, and the noise reduction signal and
- a synchronization detection circuit which performs detection processing for an output signal of the amplification circuit, and
- the detection circuit detects a physical quantity signal based on an output signal of the synchronization detection circuit.
6 more elements
Dependencies are inferred from the claim text.