Charge control circuit
US7218499B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 22, 2004 |
| Grant date | May 15, 2007 |
| Priority date | — |
| Expiry date | Aug 5, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2310/061
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A charge control circuit includes a switch circuit having an input node configured to receive a reference voltage at a selected voltage level and configured to respond to a charge signal to pre-charge the input node with a pulse charge at the selected voltage level. The switch circuit further includes a single switch configured to respond to an enable signal having a duration shorter than a mechanical time constant of a micro-electro mechanical device (MEM device) having a variable capacitor with first and second plates and wherein the single switch is coupled to the MEM device to apply the selected voltage level across first and second plates of a variable capacitor of the MEM device for the duration to thereby cause the pulse charge to accumulate on the variable capacitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.