Motion detection circuit for electronic weighing system
US4008405A · kind A · utility
21Cited by
2References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 5, 1975 |
| Grant date | Feb 15, 1977 |
| Priority date | — |
| Expiry date | Jun 5, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K5/24
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
For use in an electronic digitizer such as employed in an electronic weighing system, a circuit for detecting motion and providing a digital output signal. The circuitry includes a dual slope analog-to-digital converter having means for retaining a representation of the integrated analog level of a present and previous conversion cycle, the levels being representative of sampled data. The stored amplitudes are compared to provide an analog difference signal, and an output signal representative of measured weight is provided only when the difference signal is less than a predetermined reference threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.