Optical code reader having a controllable amplifier and methods therefor
US6119938A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 17, 1998 |
| Grant date | Sep 19, 2000 |
| Priority date | — |
| Expiry date | Jun 17, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10851
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An amplifier has an input responsive to an optical detector. A comparator is responsive to an output of the amplifier. A data communication circuit is responsive to the comparator. An optical emitter is responsive to the data communication circuit. A multi-bit analog-to-digital converter is responsive to the output of the amplifier. A processor reads a sample from the multi-bit analog-to-digital converter while the optical emitter is cooperating with the data communication circuit to transmit a message. The processor applies a signal to a control input of the amplifier in response to determining that the sample is beyond a threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.