Drive signal control for resonating elements
US9823072B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 25, 2015 |
| Grant date | Nov 21, 2017 |
| Priority date | — |
| Expiry date | May 27, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L1/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In some implementations, a control system for a resonating element comprises: a resonating element being driven by an oscillating drive signal and configured to generate a sense signal proportional to an amplitude of motion; a phase comparator coupled to the resonating element and to an oscillating drive signal, the phase comparator configured to compare the sense signal and the oscillating drive signal and to generate an error signal proportional to the phase difference; an oscillator coupled to the phase comparator and configured for generating the oscillating drive signal, the oscillator configured to receive the error signal and to adjust a phase of the oscillating signal based on the error signal; and an automatic gain control coupled to the resonating element and the oscillator, the automatic gain control configured to adjust the gain of the oscillating drive signal based on the signal generated by the resonating element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.