Radio frequency equalizer
US4405954A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 25, 1981 |
| Grant date | Sep 20, 1983 |
| Priority date | — |
| Expiry date | Nov 25, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G1/0023
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A control circuit for selectively combining two or more input signals is comprised of two amplifier circuits, each having two input stages and a dual output stage with one output stage of each amplifier circuit being gain controllable in response to a control signal. The gain controllable output stages are connected to a single combined output terminal and the other output stages are connected to a circuit ground. One input signal is supplied to one input stage of each amplifier circuit whereas the other input signal is supplied in non-inverted form to the other input stage of one of the amplifier circuits and is supplied in inverted form to the other input stage of the other amplifier circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.