Analog to frequency convertor
US4124821A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 15, 1977 |
| Grant date | Nov 7, 1978 |
| Priority date | — |
| Expiry date | Aug 15, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/506
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An analog to frequency convertor for developing an output signal of frequency proportional to a measuring current or voltage by the charge quantity compensation method, comprising an integrator, a threshold switch downstream thereof, a compensating charge transmitter which supplies a constant compensating charge to a capacitor of the integrator each time the threshold switch responds, and a control circuit to generate a periodic digital polarity signal which controls the polarity of the measuring current or voltage and of the compensating charge transmitter and always changes its logic value at the same level of the output voltage of the integrator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.