Oscillating circuit having an analog oscillating element

US7839227B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Hans-Dieter Schwarz · Balingen, DE
• Arnd Gangei · Eningen unter Achalm, DE
• Wolfram Bauer · Lörrach, DE
• Gerhard Wucher · Reutlingen, DE
• Christoph Lang · Palo Alto, US
• Ermin Esch · Neckartenzlingen, DE
• Michael Veith · Reutlingen, DE
• Thomas Mayer · Reutlingen, DE
• Markus Brockmann · Lörrach, DE

Key dates

• Filing date: Dec 9, 2005
• Grant date: Nov 23, 2010
• Expiry date: Sep 25, 2026

Classification

• Technology area (CPC G): Physics
• CPC primary: G01C19/56
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An oscillating circuit includes an analog oscillation element. The oscillating circuit includes at least one analog-to-digital conversion device. A method is for operating an oscillating circuit, in which a mechanical oscillator oscillates at a natural frequency. The oscillation amplitude is measured and digitized. A digital control signal is generated from this with the aid of a digital amplitude controller. A driving signal is generated, in turn, from the digital control signal, the driving signal driving the mechanical oscillator with the aid of a drive unit. This control loop stabilizes the oscillation amplitude.