Signal evaluation circuit for a motion detector
US5659316A · kind A · utility
11Cited by
1References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 15, 1995 |
| Grant date | Aug 19, 1997 |
| Priority date | — |
| Expiry date | Nov 15, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/19
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The motion detector generates a sensor signal (SS) which contains a direct current portion and an alternating current portion. The signal evaluation circuit (3) contains means for filtering out the direct current portion, an analogue-to-digital converter (4) and an amplifier for the alternating current portion of the sensor signal. The analogue-to-digital converter (4) is provided for the direct digitizing of the entire sensor signal (SS) and the means for filtering out the direct current portion are formed by a digital high-pass filter (5) connected downstream of the analogue-to-digital converter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.