Radio frequency transmitter having circuitry for regulating a mixing frequency adjusting output power, eliminating high frequency abnormalities, preventing audio/visual interference, and controlling output intensity
US5805240A · kind A · utility
0Cited by
5References
4Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 27, 1995 |
| Grant date | Sep 8, 1998 |
| Priority date | — |
| Expiry date | Dec 27, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/38
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A radio frequency transmitter includes a video signal input terminal, an audio signal input terminal, a variable frequency modulation degree circuit, a band pass filter, a sound intensity regulation circuit, a voltage controlled oscillator, a modulation mixer, and an amplifying circuit. The transmitter is arranged to eliminate high frequency abnormalities, prevent interference of audio signals with video signals, stabilize the audio frequency response of the transmitter, and improve circuit stability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.