Capacitance detector for accelerometer and gyroscope and accelerometer and gyroscope with capacitance detector

A capacitance-to-frequency converter is configured to convert a difference between first and second capacitances produced of a teeter-totter capacitive transducer as a result of a rotational force being applied to the teeter-totter capacitive transducer to a first signal having a first frequency tha...

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Bibliographische Detailangaben
1. Verfasser:	RUBY RICHARD C
Format:	Patent
Sprache:	eng
Schlagworte:	GYROSCOPIC INSTRUMENTS INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT MEASURING MEASURING DISTANCES, LEVELS OR BEARINGS MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION,OR SHOCK NAVIGATION PHOTOGRAMMETRY OR VIDEOGRAMMETRY PHYSICS SURVEYING TESTING
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Beschreibung
Zusammenfassung:	A capacitance-to-frequency converter is configured to convert a difference between first and second capacitances produced of a teeter-totter capacitive transducer as a result of a rotational force being applied to the teeter-totter capacitive transducer to a first signal having a first frequency that is a function of the rotational force, and to convert a sum of the first and second capacitances produced as a result of an acceleration force to a second signal having a second frequency that is a function of the acceleration force. The capacitance-to-frequency converter includes a first oscillator having a first oscillator frequency that changes in response to a change in the first capacitance; a second oscillator having a second oscillator frequency that changes in response to a change in the second capacitance; and a mixer having first and second mixer inputs connected outputs of the first and second oscillators.