Variable resistance switch suitable for supplying high voltage to drive load
US8537593B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2011 |
| Grant date | Sep 17, 2013 |
| Priority date | — |
| Expiry date | Mar 19, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C16/12
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A circuit for supplying a high voltage to load is described. An example of such a circuit could be used in the peripheral circuitry of a non-volatile memory device for supplying a program voltage from a charge pump to a selected word line. The circuit includes a charge pump that generates the high voltage and decoding circuitry that is connected to receive this high voltage and selectively apply it to a load. The decoding circuitry receives the high voltage through a switch, where the switch is of a variable resistance that progressively passes the high voltage in response to a control signal. In a particular example, the switch includes a transistor connected between the charge pump and the decoding circuitry, where the control gate of the transistor is connected to the output of a second charge pump that is connected to receive the high voltage and a settable clock signal as its inputs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.