Two-dimensional pattern digitizer
US5784053A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 1995 |
| Grant date | Jul 21, 1998 |
| Priority date | — |
| Expiry date | Jun 20, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/403
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A digitizer includes a reference level generator for generating a reference level, a comparator for comparing a signal level of the analog input with the reference level to provide a digitized output, a first detecting circuit for detecting a moderate change in the signal level of the analog input so as to change the reference level in accordance with the detected moderate change in the signal level of the analog input, and a second detecting circuit for detecting a rapid change in the signal level of the analog input so as to change the reference level in accordance with the detected rapid change in the signal level of the analog input.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.