Variable reluctance transducer processing circuit for providing an output unaffected by low frequency components
US5012207A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 4, 1989 |
| Grant date | Apr 30, 1991 |
| Priority date | — |
| Expiry date | Oct 4, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P3/488
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A circuit for processing a high frequency output signal from a variable reluctance transducer, this signal including an unwanted low frequency component, comprises a comparator having a first input receiving the transducer signal and a second input receiving the same transducer signal but via a low pass filter. The comparator therefore provides an output representing the high frequency variations in the transducer signal and substantially unaffected by the low frequency component. Alternatively, the transducer signal may be applied to a circuit providing a first output signal varying as the low frequency component and also providing a second output signal varying as the high frequency variations in the received transducer signal, the first output signal being used as a feedback control which tends to render the second output signal free of low frequency variations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.