Charge pump with output current adjustment
US11722142B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 25, 2022 |
| Grant date | Aug 8, 2023 |
| Priority date | — |
| Expiry date | Jun 25, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L2207/06
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In described examples, a charge pump includes an output, first and second transistors, a control circuit, a multiplexer, and a calibration circuit. The first transistor's drain is coupled to the output. The second transistor's drain is part of a current path separate from a current path that includes the first transistor's drain. The control circuit generates a control signal in response to voltages at the gates of the first and second transistors. First and second inputs of the multiplexer are respectively coupled to sources of the first and second transistors. A control input of the multiplexer is coupled to receive the control signal. A first input of the calibration circuit is coupled to an output of the multiplexer. A second input of the calibration circuit receives a reference voltage. First and second outputs of the calibration circuit are respectively coupled to body terminals of the first and second transistors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.