Threshold detector of a power on reset circuit with improved accuracy for switching levels over temperature variations
US12231115B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 12, 2020 |
| Grant date | Feb 18, 2025 |
| Priority date | — |
| Expiry date | Feb 12, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/14
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A power on reset circuit includes a threshold detector circuit. The threshold detector circuit includes a power supply voltage, a voltage comparator, first circuitry, second circuitry, and third circuitry. The voltage comparator has first and second input terminals, and an output terminal to provide a reset signal. The first circuitry is operable to convert the power supply voltage to a sensed current, and provides a positive temperature coefficient to the sensed current. The second circuitry is operable to generate, based on the sensed current, a temperature-dependent voltage corresponding to the power supply voltage and to couple the temperature-dependent voltage to the first input of the voltage comparator. The third circuitry is operable to generate, based on the sensed current, a reference voltage and to couple the reference voltage to the second input of the voltage comparator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.