Voltage detection circuit
US9236857B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 15, 2014 |
| Grant date | Jan 12, 2016 |
| Priority date | — |
| Expiry date | Jul 15, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/223
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A voltage detection circuit includes a reference voltage and current supply configured to generate a reference voltage and a reference current; a switching element configured to shift from an off-state to an on-state when the reference voltage is higher than a predetermined threshold voltage; a current mirror circuit allowing a current corresponding to the reference current to flow through the switching element in the on-state; a capacitive element coupled in series to the current mirror circuit and charged with the current flowing through the switching element; and an inverter configured to output an enable signal activated based on a terminal voltage of the capacitive element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.