Charge pump for use with a synchronous load
US8040700B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 16, 2009 |
| Grant date | Oct 18, 2011 |
| Priority date | — |
| Expiry date | Apr 14, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/07
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A charge pump has circuitry and implements a method for monitoring a synchronous load by using a first voltage threshold below a target output voltage and a second voltage threshold above a target output voltage. An output terminal is coupled to the load. Charge is demanded by clocking the load. When the target output voltage passes below the first voltage threshold, a first value representing a present size of a charging capacitance is stored as a stored first value, and a second stored value representing a needed changed size of the charging capacitance is used. The present size of the charging capacitance is changed in response to the passing of the target output voltage below the first voltage threshold. When demand for charge from the load is reduced, a present value is saved and a prior value is restored to change the size of the charging capacitance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.