Automotive test system with input protection
US5315252A · kind A · utility
14Cited by
3References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 26, 1992 |
| Grant date | May 24, 1994 |
| Priority date | — |
| Expiry date | Aug 26, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R16/0315
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An input protection circuit protects a multiplexer used in an automotive breakout box for coupling to an electronic control module (ECM) of an automotive vehicle. The input protection circuit includes resistors connected between the input and the multiplexer and a negative feedback amplifier connected to the output of the multiplexer. The negative feedback amplifier provides a virtual ground. Additionally, the inputs to the multiplexer are clamped to within one diode forward voltage drop of electrical ground by diode pairs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.