Electronic device, transmission system, and method for determining connection condition
US7271597B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 23, 2006 |
| Grant date | Sep 18, 2007 |
| Priority date | — |
| Expiry date | Oct 23, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2203/547
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An electronic device has a first signal path, a first power supply path, and a connector that transmits to an external device the input signal on which the voltage has been superposed. The device also has a first power supply switch inserted into the first power supply path and an amplitude detector that detects at the connector an amplitude of the input signal, a control section that determines, based on a detection output from the amplitude detector, which a connection condition of the external device to the connector is a first condition in which the external device is not connected to the connector or a second condition in which the external device is connected to the connector. Based on the connection condition, the control section turns on or off the first power supply switch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.