Method of amplitude-frequency conversion and a converter which operates in accordance with said method
US3968447A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 13, 1973 |
| Grant date | Jul 6, 1976 |
| Priority date | — |
| Expiry date | Dec 13, 1993 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K7/06
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The amplitude of an electrical signal is converted into a current of proportional intensity which is integrated and an integration voltage appears at the terminals of the integrating circuit. There is produced a signal which initiates stopping of the current integration and a signal which initiates the start of a following integration at the instant when the integration voltage attains a threshold value V.sub.O. Stopping of the integration occurs after a time-delay .theta., when the integration voltage has overstepped the threshold value V.sub.O and attained a maximum value V'.sub.O. The threshold value V.sub.O is adjusted so as to control the maximum value V'.sub.O in dependence on a reference voltage V".sub.O which is higher than V.sub.O. The frequency of integrations is measured, with the result that the conversion frequency is thus determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.