Selectable low power signal line and method of operation
US5939923A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 17, 1997 |
| Grant date | Aug 17, 1999 |
| Priority date | — |
| Expiry date | Nov 17, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/018585
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A selectable low power signal line (10) is provided that includes a driver circuit (12) connected to receive an input signal for transmission and to receive a mode select signal (SELECT). The driver circuit (12) has a low power mode and a full power mode selectable responsive to the mode select signal (SELECT). The driver circuit (12) is operable, when in the full power mode, to drive an output signal at a full swing of the input signal. When in the low power mode, the driver circuit (12) is operable to drive the output signal at a fraction of the full swing of the input signal. A physical signal line (14) is connected to receive the output signal of the driver circuit (12) and to carry the output signal. A receiver circuit (16) is connected to receive the signal on the physical signal line (14) and is also connected to receive the mode select signal (SELECT). The receiver circuit (16) has a low power and full power mode selectable responsive to the mode select signal (SELECT). The receiver circuit (16) is operable, when in the full power mode, to drive an output signal at a full swing of the signal on the physical signal line (14). When in the low power mode, the receiver circuit …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.