Voltage regulator and dynamic bleeder current circuit
US10503189B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 23, 2019 |
| Grant date | Dec 10, 2019 |
| Priority date | — |
| Expiry date | Apr 23, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K5/2472
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A dynamic bleeder-current circuit for use in a voltage regulator is provided. The dynamic bleeder-current circuit includes a first bleeder-current circuit and a second bleeder-current circuit. The first bleeder-current circuit includes an input stage, a current comparator, and a bleeder-current output stage. The input stage maps a bias current in an operational amplifier in the voltage regulator with a predetermined ratio to generate a mapped current. The current comparator compares a pull current and a sink current generated by the mapped current. The bleeder-current output stage determines whether to use a first current to discharge the load capacitor of the voltage regulator according to a comparison result from the current comparator. The second bleeder-current circuit is configured to provide a second bleeder current to discharge the load capacitor. The first current is greater than the second current, and the pull current is equal to the second current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.