Digital remote control system with signal verification
US4006462A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 10, 1975 |
| Grant date | Feb 1, 1977 |
| Priority date | — |
| Expiry date | Mar 10, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03J9/04
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A wireless remote control system has a transducer coupled to a sampling first counter for counting the frequency of incoming signals. A portion of the count distinguishes among various control signal frequencies and is supplied to a memory and a comparator. A second counter counts the number of identical comparisons of present and immediately preceding measurements, and is reset when a non-identical comparison is detected. The memory supplies the stored portion of the count to a decoder which is disabled by the second counter until a predetermined number of identical frequency comparisons have been determined, which provides noise immunity. The decoder is coupled to utilization means to activate the control function corresponding to the frequency of the control signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.