Techniques for measuring voltages in a circuit
US8193836B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 9, 2011 |
| Grant date | Jun 5, 2012 |
| Priority date | — |
| Expiry date | May 9, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R19/16552
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A circuit includes a comparator, a resistor divider, a control circuit, a multiplexer, and a programmable gain amplifier. The comparator is operable to measure an internal voltage of the circuit based on a selected reference voltage. The resistor divider is operable to generate reference voltages. The control circuit is operable to generate a select signal based on an output signal of the comparator. The multiplexer is operable to select one of the reference voltages from the resistor divider as the selected reference voltage based on the select signal. The programmable gain amplifier is configurable to generate a compensation voltage to compensate for an offset voltage of the comparator. The compensation voltage is provided to an input of the comparator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.