Method and device for carrying out frequency synthesis in a distance measuring device
US6859744B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 29, 2003 |
| Grant date | Feb 22, 2005 |
| Priority date | — |
| Expiry date | May 29, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/4915
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a method and a device for carrying frequency synthesis, in particular in a distance measuring device based on the principle of evaluating the change over time in the phase of an electromagnetic radiation emitted by a radiation source and remitted by an object aimed at, a frequency, which is preferably furnished by a quartz oscillator, is regulated in a ring oscillator with N delay elements (V1, V2, V3, . . . , VN) to a desired first high frequency (F), which is used as a mixer frequency or as a modulation frequency. The signals at the N delay elements (V1, V2, V3, . . . , VN) are delivered to a multiplexer, which is switched over with a cadence that is equivalent to 2*N times the frequency of the low-frequency measurement signal to be evaluated to produce a modulation frequency or mixer frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.