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US 2003/0151394 A1Published application
Sensor-independent oscillation amplitude control
AssigneeRobert Bosch GmbH
InventorsJens Mohaupt, Johannes Artzner, Wolfram Bauer
Life of this patent
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Abstract
A device (100, 200) is described for generating an electric voltage by which a body of a capacitive and/or inductive sensor capable of vibration, such as a capacitive micromechanical rotational rate sensor in particular, is induced to vibrate. In order to reduce the manufacturing cost of the sensor, a voltage generating device (109) is provided which induces a constant mechanical deflection of the body capable of vibration, this deflection being independent of the manufacturing tolerances of the sensor.
Claims12
A device (100;
- 200) for generating an electric voltage whereby vibration of a body of a capacitive and/or inductive sensor capable of vibration, such as a capacitive micromechanical rotational rate sensor in particular, is induced,
- characterized by a voltage generating device (109) which generates an electric voltage (UI) which is proportional to the resting capacitance (C0) and/or to the induction of the magnetic field of the sensor.
The device as recited in one of the preceding claims,
- wherein the output signal of the first signal path (107) is sent to a first input of a second adder (110) and the output signal of the second signal path (108) is sent to a second input of the second adder (110), the output signal of the second adder (110) being demodulated by a demodulator (111) and sent to the amplifier (121) for amplification.
Dependencies are inferred from the claim text.