US 8,297,120 B2 · Angular velocity signal detection circuit and angular velocity signal detection method

Abstract

An angular velocity signal detection circuit includes: a first current-voltage conversion circuit that converts, into a voltage, a current outputted from a first detection electrode of a gyroscope, and amplifies the voltage, thereby outputs a first conversion signal; a second current-voltage conversion circuit that converts, into a voltage, a current outputted from a second detection electrode of the gyroscope, and amplifies the voltage, thereby outputs a second conversion signal; an arithmetic operation unit that performs arithmetic operations by using the first conversion signal and the second conversion signal, and outputs a first processing signal and a second processing signal; and a third difference arithmetic operation circuit that amplifies a difference between the first processing signal and the second processing signal.

Claims9

Dependent claims

An angular velocity signal detection circuit comprising:

a first current-voltage conversion circuit configured to convert a current outputted from a first detection electrode of a gyroscope into a first voltage, and to amplify the first voltage, to thereby output a first conversion signal;
a second current-voltage conversion circuit configured to convert a current outputted from a second detection electrode of the gyroscope into a second voltage, and to amplify the second voltage, to thereby output a second conversion signal;
an arithmetic operation unit configured to perform arithmetic operations by using the first conversion signal and the second conversion signal, and to output a first processing signal and a second processing signal;
and
a difference arithmetic operation circuit configured to amplify a difference between the first processing signal and the second processing signal, to thereby output a signal indicative of angular velocity.

2 more elements

An angular velocity signal detection method comprising:

converting a current outputted from a first detection electrode of a gyroscope into a first voltage, and amplifying the first voltage, thereby generating a first conversion signal;
converting a current outputted from a second detection electrode of the gyroscope into a second voltage, and amplifying the second voltage, thereby generating a second conversion signal;
performing arithmetic operations by using the first conversion signal and the second conversion signal, and generating a first processing signal and a second processing signal;
and
amplifying a difference between the first processing signal and the second processing signal, thereby generating an output signal indicative of angular velocity.

2 more elements

Dependencies are inferred from the claim text.

Angular velocity signal detection circuit and angular velocity signal detection method

Life of this patent

Angular velocity signal detection circuit and angular velocity signal detection method

Life of this patent

Abstract

Claims9