Bar code reader
US5349171A · kind A · utility
3Cited by
5References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 27, 1992 |
| Grant date | Sep 20, 1994 |
| Priority date | — |
| Expiry date | Jul 27, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10851
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A bar code reader has a CCD for producing an image signal, an amplifier for amplifying the image signal from the CCD and a digitalizing circuit for changing the image signal to binary signal. The CCD operates with an operating voltage Vcc less than 8 V. The amplifier has first and second operational amplifiers each having one voltage source terminal connected to Vcc of 5 V and the other voltage source terminal connected to ground. Also, the digitalizing circuit has a third operational amplifier having one voltage source terminal connected to Vcc of 5 V and the other voltage source terminal connected to ground.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.