Invention Grant
- Patent Title: Circuit arrangement and method for the digital correction of modulation effects in electromechanical delta-sigma modulators
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Application No.: US16875712Application Date: 2020-05-15
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Publication No.: US11268828B2Publication Date: 2022-03-08
- Inventor: Michael Maurer , Yiannos Manoli
- Applicant: Albert-Ludwigs-Universitat Freiburg
- Applicant Address: DE Freiburg
- Assignee: Albert-Ludwigs-Universitat Freiburg
- Current Assignee: Albert-Ludwigs-Universitat Freiburg
- Current Assignee Address: DE Freiburg
- Agency: Barley Snyder
- Priority: DE102015219458.2 20151008
- Main IPC: G01C25/00
- IPC: G01C25/00 ; G01C19/5726 ; G01C19/5712 ; G01C19/5776

Abstract:
The present invention relates to a circuit arrangement and a method for reading a capacitive vibratory gyroscope with an at least primary mass and at least one secondary mass that is connected to the primary mass, wherein the primary mass is excited to a primary vibration during operation, and wherein the secondary mass is deflected out of a resting position in a direction that is transversal to the primary vibration when the vibratory gyro-scope rotates around a sensitive axis. The circuit arrangement comprises a delta-sigma modulator with at least one control loop to perform a force feedback that resets the secondary mass into its resting state by applying a reset signal, wherein the reset signal forms a modulator output signal of the delta-sigma modulator, a correction unit that receives the modulator output signal and that is operated to generate a corrected modulator output signal that corresponds to an actually acting feedback force, a demodulator that is connected to the correction unit for demodulation of the corrected modulator output signal, and a filter arrangement to filter the demodulated signals and to output a rotary rate signal.
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