Angular velocity detection circuit, angular velocity detection device, electronic apparatus, and moving object

Abstract

The invention provides an angular velocity detection circuit, an angular velocity detection device, an electronic apparatus, and a moving object. The angular velocity detection circuit includes: a first conversion unit that includes a first operational amplifier, and converts a first detection signal, which is output from a first detection electrode and is input to a first input terminal of the first operational amplifier, into a voltage; an angular velocity signal generation unit that generates an angular velocity signal on the basis of an output signal of the first conversion unit; and a first correction signal generation unit that generates a first correction signal for reducing an offset of the angular velocity signal which occurs due to a leakage signal included in the first detection signal on the basis of a signal based on drive oscillation of the angular velocity detection element. The first correction signal is input to the first input terminal or a second input terminal of the first operational amplifier directly or through a resistor.

Description

technical field [0001] The invention relates to an angular velocity detection circuit, an angular velocity detection device, electronic equipment and a moving body. Background technique [0002] In recent years, an angular velocity sensor (gyro sensor) that detects angular velocity using, for example, silicon MEMS (Micro Electro Mechanical System: Micro Electro Mechanical System) technology has been developed. [0003] Patent Document 1 discloses a method for reducing the quadrature error contained in the output signal of the detection main section by inputting a quadrature error canceling signal to the front stage of the detection circuit (between the detection main section and the C / V conversion circuit) by capacitive coupling. Signal technology. [0004] However, in the gyro sensor described in Patent Document 1, there is a problem that when capacitive coupling is performed before the detection circuit, the noise component included in the signal input to the detection ci...

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Problems solved by technology

[0004] However, in the gyro sensor described in Patent Document 1, there is a problem that when capacitive coupling is performed before the detection circuit, the noise component included in the signal input to the detection circuit increases, making it difficult to detect S / N improvement of the output angular velocity signal

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