Stereophonic signal demodulation circuit
US4280101A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 2, 1979 |
| Grant date | Jul 21, 1981 |
| Priority date | — |
| Expiry date | Jul 2, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/1646
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A stereophonic signal demodulation circuit receives an input signal including a signal modulated with first and second channel information to separate the first and second channel information from each other. The circuit includes first and second operational amplifiers and at least two switching devices namely, first and second switches for applying the input signal through respective resistors to one input terminal of the first operational amplifier and third and fourth switches for applying the input signal through respective resistors to one input terminal of the second operational amplifier. A control device controls the operations of the first through fourth switches and the first and second operational amplifiers outputs first and second channel information, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.