Overcurrent protection in amplifier topologies employing DC isolation
US7138864B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 15, 2004 |
| Grant date | Nov 21, 2006 |
| Priority date | — |
| Expiry date | Feb 16, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/462
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An amplifier having output switch circuitry is described. A sense resistor is operable to transmit an output current associated with the output switch circuitry. Low-voltage circuitry is operable to provide a drive signal to the output switch circuitry. Isolation circuitry is operable to provide DC isolation between the low-voltage circuitry and the output switch circuitry. Current sensing circuitry is directly connected to the sense resistor and is operable to sense the output current in the sense resistor and generate a fault signal in response to an overcurrent condition. The fault signal is characterized by a signal level which is compatible with the low-voltage circuitry without additional DC isolation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.