Radio frequency oscillator-modulator circuit
US4337444A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 24, 1980 |
| Grant date | Jun 29, 1982 |
| Priority date | — |
| Expiry date | Jan 24, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K9/006
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A radio frequency oscillator-modulator for use in a video game includes an oscillator circuit, formed from a first differentially connected, emitter-coupled transistor pair having base/collector cross-coupling, that is dc coupled to the differential inputs of a second differentially connected, emitter-coupled transistor pair that forms the modulator circuit. The modulation signal is applied through a resistance to the connected emitters of the modulator circuit to vary the drive current thereof. The radio frequency oscillator-modulator includes bias circuitry that establishes a low level of operation that provides for great linearity and low R.F. radiation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.