Digital ramp rate control for charge pumps
US9653126B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 2014 |
| Grant date | May 16, 2017 |
| Priority date | — |
| Expiry date | Oct 21, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C2013/0092
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Methods for controlling a ramp rate of an output voltage derived from one or more charge pumps and reducing variation in the ramp rate due to process, voltage, and temperature (PVT) variations are described. In some embodiments, the ramp rate of the output voltage from one or more charge pumps may be controlled using a ramp rate control circuit that uses a digital counter to adjust (or step up) the output voltage from the one or more charge pumps based on a ramp rate schedule. The ramp rate schedule may specify varying output voltage levels for the one or more charge pumps during a time period in which the output voltage charges up from a first voltage to a second voltage greater than the first voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.