Diagnostic circuits with duplicate resistive networks for sensor output buffers
US12153073B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 9, 2022 |
| Grant date | Nov 26, 2024 |
| Priority date | — |
| Expiry date | Jun 21, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/20
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Output buffer diagnostic circuits for monitoring a sensor output buffer include a duplicate resistive network corresponding to a resistive network in the monitored sensor output buffer. The duplicate resistive network may include the same or similar topology as the output buffer resistive network. The duplicate resistive network is configured to produce a differential duplicate signal indicative of when an error condition exits in the sensor output buffer. The diagnostic circuit can include averaging circuitry configured to receive the differential duplicate signal and produce an average duplicate signal. The diagnostic circuit can include an error comparison circuit configured to receive the average duplicate signal and detect when the average duplicate signal exceeds a nominal or preset error value corresponding to an error condition in the sensor output buffer. The error comparison circuit is configured to produce an error indication when the average duplicate signal exceeds the preset error value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.