Voltage divider circuit
US6452440B2 · kind B2 · utility
4Cited by
19References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 10, 2001 |
| Grant date | Sep 17, 2002 |
| Priority date | — |
| Expiry date | Jan 10, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K5/2472
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A charge pump system includes a charge pumping circuit for outputting a high voltage VPP at a node. An oscillator circuit, coupled to the charge pumping circuit, drives the charge pumping circuit with at least one clock signal. A current source generates a pulldown current. A voltage divider circuit is coupled between the node and the current source. The voltage divider circuit cooperates with the current source to form a feedback loop for controlling the oscillator circuit to run at variable, optimum frequency for controlling the rate-of-rise and the amplitude of the high voltage VPP while minimizing power-supply current drain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.