Charge pump with cascode biasing
US7688122B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 7, 2008 |
| Grant date | Mar 30, 2010 |
| Priority date | — |
| Expiry date | May 10, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/0895
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In particular embodiments, a charge pump includes a first input transistor operable to receive an up signal and in response to receiving the UP signal, transmit a corresponding output current from a positive power supply to an output node. The charge pump further includes a second input transistor operable to receive a down signal and in response to receiving the DN signal, transmit a second corresponding output current from a negative power supply to the output node. Additionally, the charge pump includes a first cascode transistor and a second cascode transistor positioned in a first current path between the first input transistor and the output node, and a third cascode transistor and a fourth cascode transistor positioned in a second current path between the second input transistor and the output node. The charge pump further includes a current mirror coupled to gates of the first, second, third, and fourth cascode transistors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.