System and method for using an integrated circuit pin as both a current limiting input and an open-drain output
US8836352B2 · kind B2 · utility
3Cited by
4References
20Claims
0Family size
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Key dates
| Filing date | Jun 11, 2009 |
| Grant date | Sep 16, 2014 |
| Priority date | — |
| Expiry date | Mar 10, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/1732
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An integrated circuit comprises at least one pin and has at least one resistor connected between a reference voltage and the at least one pin. Current measurement circuitry applies a voltage across the at least one resistor and measures a current at the at least one pin responsive to the applied voltage in a first mode of operation. The measured current enables determination of a current limit set point for the integrated circuit. In a second mode of operation, the at least one resistor comprises a pull up resistor and the at least one pin that is connected to the at least one resistor comprises an open-drain output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.