Signal selection circuit
US4745298A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 28, 1987 |
| Grant date | May 17, 1988 |
| Priority date | — |
| Expiry date | Sep 28, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/10
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A signal selection circuit capable of automatically selecting an input signal in a device having digital and analog input terminals for one and the same audio source device comprises a switch for connecting either the analog input terminal or the digital input terminal to a post stage circuit and a circuit for causing the switch to connect the analog input terminal to the post stage circuit when an analog input signal only has been applied and causing the switch to connect the digital input terminal to the post stage circuit when a digital input signal only has been applied or when an analog input signal and a digital input signal have been applied simultaneously to these terminals. A digital signal which is an input signal of higher quality is automatically selected when an analog signal and a digital signal are applied simultaneously and the listener has only to select a source device so that the operation he is required to perform is simplified.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.