Duty cycle alteration circuit
US6297815A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 23, 1997 |
| Grant date | Oct 2, 2001 |
| Priority date | — |
| Expiry date | Dec 23, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G1/04
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A duty cycle alteration circuit can simply alter a duty cycle of a pulse by using a Schmitt circuit in a monitor. The duty cycle alteration circuit includes: a microcomputer for outputting a waveform amplifying ratio control signal; an amplifying circuit for inputting and amplifying the waveform amplifying ratio control signal outputted by the microcomputer or a triangular wave and for outputting an amplified triangular wave; and a Schmitt circuit for establishing a logic "high" level and a logic "low" level centering around a reference level according to the amplified triangular wave supplied from the amplifying circuit and for changing a duty cycle on the basis of the logic "high" and "low" levels and for outputting a rectangular wave having an altered duty cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.