Duty-cycled phase shifter for angular rate sensor
US10704910B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 2017 |
| Grant date | Jul 7, 2020 |
| Priority date | — |
| Expiry date | May 19, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G3/20
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An architecture is disclosed for an angular rate sensor that includes a duty-cycled phase shifter for generating a clock with high resolution delay for use in synchronized demodulation of a sensor output signal. In an embodiment, a sensor comprises: a mechanical resonator; a drive circuit coupled to the mechanical resonator and operable to actuate the mechanical resonator into resonant vibration; a sense circuit mechanically coupled to the mechanical resonator, the sense circuit operable to generate a sense signal having an in-phase signal component and a quadrature signal component; a demodulator circuit operable to receive the sense signal and a first clock for demodulating the sense signal to separate the in-phase signal component from the quadrature signal component; and a duty-cycled phase shifter coupled to the demodulator, the duty-cycled phase shifter operable to generate the first clock.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.