Apparatus for magnetically detecting a position of a movable magnetic body
US4853632A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 24, 1981 |
| Grant date | Aug 1, 1989 |
| Priority date | — |
| Expiry date | Nov 24, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/147
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for magnetically detecting a position of a movable magnetic body includes a three-terminal magnetic field-intensity sensing structure formed by a pair of magneto-resistors. The magnetic field-intensity sensing structure is disposed opposite to a magnetic body arranged for movement relative thereto in a magnetic field and generates a first electrical signal of sinusoidal waveform in response to a change in the intensity of the magnetic field due to the relative movement of the magnetic body. This first electrical signal appears from the apparatus as a second electrical signal of rectangular waveform or of sinusoidal waveform having an amplified amplitude. Components of the circuit for shaping the waveform of or amplifying the amplitude of the first electrical signal are integrally mounted together with the magneto-resistors on a substrate. Preferably, the shaping or amplifying circuit is in the form of a hybrid integrated circuit formed on the substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.