Voltage generating circuit and overcurrent detecting circuit
US10281941B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 2017 |
| Grant date | May 7, 2019 |
| Priority date | — |
| Expiry date | Dec 4, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/0072
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A voltage generating circuit includes a first resistance voltage dividing circuit, configured by low temperature coefficient resistors being connected in series, that generates a reference voltage by resistance-dividing a predetermined power supply voltage, one or a multiple of a second resistance voltage dividing circuit, configured by a resistor having a positive or negative resistance temperature coefficient and the low temperature coefficient resistor being connected in series, that generates a temperature-dependent divided voltage by resistance-dividing the power supply voltage, and an instrumentation amplifier that generates the comparison reference voltage in accordance with a difference between the reference voltage and the divided voltage. The voltage generating circuit includes a comparator that, when a divided voltage exceeds a predetermined voltage threshold in accompaniment to a temperature rise, changes the divided voltage generated by the second resistance voltage dividing circuit and applied to the instrumentation amplifier, or changes a gain of the instrumentation amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.