Oscillator and inductive proximity switch
US10505539B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 9, 2015 |
| Grant date | Dec 10, 2019 |
| Priority date | — |
| Expiry date | Sep 12, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/94031
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The invention relates to an oscillator comprising a resonant circuit having at least one inductor and one capacitor and having a feedback amplifier, wherein there is at least one trimming resistor in a feedback circuit of the amplifier. The oscillator is characterized in that there is an electronic switching device for alternately connecting and disconnecting the trimming resistor, in that a trimming circuit is formed by the trimming resistor and the electronic switching device, in that there is a drive device for driving the electronic switching device, in that the electronic switching device, together with the drive device, is designed to alternately connect and disconnect the trimming resistor in a switching sequence, and in that an average time value of the electrical resistor of the trimming circuit, which is active in an oscillator mode, is defined by the switching sequence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.