AFC Interface circuit
US4271533A · kind A · utility
2Cited by
2References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1980 |
| Grant date | Jun 2, 1981 |
| Priority date | — |
| Expiry date | Jun 30, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03J7/02
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An interface circuit that couples the output of a differential AFC detector to a tuner and in so doing provides a single-ended control signal and a substantially constant reference signal. A bridging circuit combines the differential outputs to effect a substantially constant signal which is appropriately scaled by a referencing circuit so as to develop the reference voltage required. A dividing circuit coupled to one of the differential outputs develops an AFC control voltage having the range required to accommodate the tuner's AFC-responsive circuitry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.