Data transmission system
US7260057B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 6, 2003 |
| Grant date | Aug 21, 2007 |
| Priority date | — |
| Expiry date | Oct 28, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/061
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The invention provides a technique that enables a correct discrimination of reception data, when the supply voltage of a semiconductor integrated circuit having a simultaneous bi-directional interface is decreased. The data transmission system is provided with input circuits constituting a simultaneous bi-directional interface by the number of reference voltages used. Each of the input circuits is supplied with a fixed reference voltage, the input circuit supplied with a higher reference voltage employs a differential amplifier with n-channel MOSFETs served as input differential devices, and the input circuit supplied with a lower reference voltage employs a differential amplifier with p-channel MOSFETs served as input differential devices, in which selectors switch the outputs of the two differential amplifiers in correspondence with the output data of their own. Thus, the system attains the reception data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.