Level shifting multiplexing circuit for connecting a two conductor full duplex bus to a bidirectional single conductor bus
US7288962B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 8, 2006 |
| Grant date | Oct 30, 2007 |
| Priority date | — |
| Expiry date | Apr 9, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/0272
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A level shifting multiplexing circuit provides an interface between a two conductor full duplex bus (two conductor bus) and a single conductor bidirectional half duplex bus (single conductor bus) where the two conductor bus is operates at a first supply voltage and the single conductor bus operates at a second supply voltage. A first switching circuit connected between the single conductor bus and the reception conductor of the two conductor bus is configured to provide a low logic signal to the reception conductor when a first switching voltage threshold is exceeded and to provide a high logic signal, otherwise. A second switching circuit connected between the single conductor bus and the transmission conductor of the two conductor bus is configured to provide a voltage less than the first switching voltage threshold when voltage at the transmission conductor exceeds a second switching voltage threshold unless a high logic signal is received on the single conductor bus. The second switching circuit is further configured to provide a voltage greater than the first switching voltage when the transmission conductor voltage exceeds the second switching voltage threshold unless a low l…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.