Charging circuit for charging a capacitor
US10020667B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 23, 2016 |
| Grant date | Jul 10, 2018 |
| Priority date | — |
| Expiry date | Oct 28, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/345
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A charging circuit that charges a capacitor using the power that is output from a power supply, includes: first and second PNP-type transistors; first and second resistors; and a current path maintaining unit, wherein the power supply is connected to the emitter terminal of the first PNP-type transistor, the first resistor is connected between the emitter terminal and the base terminal of the first PNP-type transistor, the capacitor is connected to the collector terminal of the second PNP-type transistor, the second resistor is connected between the collector and base terminals of the second PNP-type transistor, the base terminal and the collector terminal of the first PNP-type transistor are respectively connected to the emitter terminal and the base terminal of the second PNP-type transistor, and the current path maintaining unit is provided between the collector terminal of the first PNP-type transistor and the emitter terminal of the second PNP-type transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.