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AssigneeRobert Bosch GmbH
InventorsKarsten Funk, Reinhard Neul, Gunar Lorenz
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The invention relates to a device for generating bias voltages for the electrodes of a rotation rate sensor. By evaluating a rotation rate signal and a quadrature signal, control signals are generated, using an adaptive quadrature compensator, that are converted by means of a bias voltage generating arrangement into bias voltages that are delivered to the electrodes of an electrode arrangement disposed underneath the seismic mass or masses of the rotation rate sensor. As a result, the sensor structure can be inclined in such a way that the quadrature signal occurring at the output is minimized. In accordance with a further feature of the invention, the bias voltages generated by the bias voltage generating arrangement are modified, as a function of the output signal of a bandwidth adjusting circuit, in such a way that the amplitude frequency response of the detection motion has a desired bandwidth.
A device for generating bias voltage for a rotationally or linearly vibrating rotation rate sensor, which on an output side furnishes at least one measurement signal from which a rotation rate signal is ascertained by means of an evaluation circuit connected to the rotation rate sensor, and which has an electrode arrangement with at least two electrodes, which are connected to a bias voltage generating arrangement, characterized in that the device has an adaptive quadrature compensator (8), which is connected on an input side to the evaluation circuit (2, 3, 7) and on the output side to the bias voltage generating arrangement (9), wherein an adaptive phase compensator (3) in the evaluation circuit has outputs for a phase-shifted measurement signal (Ue) and demodulation carrier signals (UTq, UTr), and wherein the demodulation carrier signals are delivered to the adaptive quadrature compensator (8).
Dependencies are inferred from the claim text.