Low ripple bias voltage generator
US5036229A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 18, 1989 |
| Grant date | Jul 30, 1991 |
| Priority date | — |
| Expiry date | Jul 18, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/16
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A charge pump essentially incorporating parallel connections of low capacity charge pumps, where each low capacity charge pump is controlled by a clock signal, where the clock signal associated with a low capacity charge pump has a phase different than the other clock signals. Hence, the output of these essentially parallel connected charge pumps will have a ripple period which is a fraction of the period of any single clock signal, wherein the fraction is equal to 1/n, where n is the number of parallel low capacity charge pumps. This results in a ripple magnitude of 1/n that of charge pumps using a single clock source with identical input and output capacitance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.