Single control power-frequency control circuit
US4031319A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 12, 1975 |
| Grant date | Jun 21, 1977 |
| Priority date | — |
| Expiry date | Dec 12, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G9/02
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A single mechanically adjustable power-frequency control circuit is disclosed which is especially adaptable for use in controlling an audio electrical signal in an automotive entertainment device such as a radio or a tape player. The circuit comprises a parallel resistor and capacitor which are coupled between the wiper arm of a volume potentiometer and one end of the potentiometer by a power boost slide switch. Actuation of the switch couples the resistor and capacitor in parallel with a portion of the volume potentiometer resistance and thereby selectively emphasizes certain portions of the entire audio frequency spectrum of an audio output signal while simultaneously substantially changing the magnitude of the output signal throughout the entire audio frequency range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.