Citizens band transmitter with overall envelope feedback from antenna coupling filter
US4181889A · kind A · utility
15Cited by
4References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 5, 1978 |
| Grant date | Jan 1, 1980 |
| Priority date | — |
| Expiry date | Sep 5, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2001/0433
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A citizens band transmitter employing negative overall envelope feedback in the final RF stage obtains the feedback signal from a filter in the antenna coupling network which has a phase shift of 90 degrees or an odd multiple thereof at the radio frequency. A pair of detector diodes have their cathodes connected to opposite ends of filter and their anodes connected to a low pass filter to provide an envelope of the higher of the two voltages at either end of the filter in the coupling circuit in negative feedback to the modulating signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.