Detection of passing magnetic articles with a peak-to-peak percentage threshold detector having a forcing circuit and automatic gain control
US6297627A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 27, 1999 |
| Grant date | Oct 2, 2001 |
| Priority date | — |
| Expiry date | Jan 27, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/9517
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A proximity detector for sensing a magnetic field includes a magnetic-field-to-voltage transducer for generating a signal voltage V.sub.sig that is proportional to the magnetic field, a peak-to-peak percentage threshold detector coupled to the magnetic-field-to-voltage transducer to receive the signal voltage V.sub.sig and for providing an output signal voltage V.sub.out and a forcing circuit coupled to the peak-to-peak percentage threshold detector for forcing and maintaining the value of the output signal voltage V.sub.out at a predetermined value during an initial startup interval of the proximity detector. The proximity detector may further include an automatic gain control circuit coupled to the forcing circuit to provide a proximity detector capable of operating in a peak-to-peak percentage threshold detector mode with automatic gain control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.