Short circuit current protection in an amplifier
US8841971B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 2012 |
| Grant date | Sep 23, 2014 |
| Priority date | — |
| Expiry date | Dec 17, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/45183
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Systems and method that provide short circuit protection for a power amplifier are described. The system can include, for example, a sense network that receives an output current from the power amplifier that is to be protected. The sense network can include, for example, a first resistor and a second resistor in series. The sense amplifier has a first input and a second input in which the first input is coupled to a first end of the first resistor and in which second input is coupled to a second end of the first resistor. The sense amplifier amplifies a voltage across the first resistor of the sense network in which the voltage is based on the output current from the power amplifier. Based on the amplified voltage of the sense amplifier, the feedback network reduces the output current from the power amplifier to protect the power amplifier from damage due to a short circuit condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.