EP0057766A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Magnetoelectrical transducer
Assignee: Hitachi Ltd
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Filing: 1981-11-24
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Granted: —
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Expires: 2001-11-24
Abstract
Abstract A magnetoelectrical transducer comprising a three-terminal magnetic field-intensity sensing structure (7) formed by a pair of magneto-resistors (M i , M 2 ). The magnetic field-intensity sensing structure (7) is disposed opposite to a magnetic body (3) arranged for movement relative thereto in a magnetic field and generates a first electrical signal (V 1N ) 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 transducer as a second electrical signal (V OUT ) of rectangular waveform or of sinusoidal waveform having an amplified amplitude. Components (R 1 ,-R 6 ,19, 20) of the circuit (9) 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 (6). Preferably, the shaping or amplifying circuit is in the form of a hybrid integrated circuit formed on the substrate.
Inventors
- 👤 Yoosuke Nagano
- 👤 Sadao Sekizawa
- 👤 Toshio Seki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 04:46
CPC Classifications
G; G01; G01D; G01D5/00; G01D5/12; G01D5/14; G01D5/142; G01D5/147
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
131 words
A magnetoelectrical transducer comprising: magneto-resistor means (7) disposed opposite to a magnetic body (3) arranged for movement relative to said means so that the resistance value of said magneto-resistor means changes in response to a change in the intensity of the magnetic field due to the relative movement of said magnetic body; voltage source means for applying a predetermined voltage (Vcc) across said magneto-resistor means to derive therefrom a.first electrical output signal (V IN ) corresponding to said resistance value; circuit means (9) for converting said first electrical signal applied thereto into a second electrical signal (V OUT ) having a predetermined waveform and generating said second electrical signal as an output; and a substrate (6), said circuit means (9) and said magneto-resistor means (7) being integrally mounted on said substrate.
Claim 2
Dependent Claim
131 words
A magnetoelectrical transducer comprising: magneto-resistor means (7) disposed opposite to a magnetic body (3) arranged for movement relative to said means so that the resistance value of said magneto-resistor means changes in response to a change in the intensity of the magnetic field due to the relative movement of said magnetic body; voltage source means for applying a predetermined voltage (Vcc) across said magneto-resistor means to derive therefrom a.first electrical output signal (V IN ) corresponding to said resistance value; circuit means (9) for converting said first electrical signal applied thereto into a second electrical signal (V OUT ) having a predetermined waveform and generating said second electrical signal as an output; and a substrate (6), said circuit means (9) and said magneto-resistor means (7) being integrally mounted on said substrate.
Claim 3
Dependent Claim
28 words
2e A magnetoelectrical transducer as claimed in Claim 1, wherein said circuit means (9) is in the form of a hybrid integrated circuit formed on said substrate (6).
Claim 4
Dependent Claim
35 words
A magnetoelectrical transducer as claimed in Claim 1 or 2, wherein said magneto-resistor means (T) and said circuit means (9) are disposed on a surface of said substrate (6) opposite to said magnetic body (3).
Claim 5
Dependent Claim
45 words
A magnetoelectrical transducer as claimed in Claim 1 or 2, wherein said magneto-resistor means (7) is disposed on one surface of said substrate (6) opposite to said magnetic body (3), and said circuit means (9) is disposed on the other surface of said substrate (6).
Claim 6
Dependent Claim
32 words
A magnetoelectrical transducer as claimed in Claim 3 or 4, wherein said circuit means (9) includes resistor means (R1, R 2 ) whose resistance value is adjustable for providing said predetermined waveform.
Claim 7
Dependent Claim
52 words
A magnetoelectrical transducer as claimed in Claim 1 or 2, wherein said magnetic body (3) includes a train of teeth successively brought to a position opposite to said magneto-resistor means (7), and said transducer includes a bias magnet (8) for establishing said magnetic field, said magnet being mounted on said substrate (6).
Claim 8
Dependent Claim
107 words
A magnetoelectrical transducer as claimed in . Claim 3 or 4, wherein said magnetic body (3) includes a train of teeth successively brought to a position opposite to said magneto-resistor means (7), and said transducer includes a bias magnet (8) for establishing said magnetic field, said magneto-resistor means (7) being disposed on one of the magnetic poles of said magnet,-said magnet (8) being fixedly supported in a slot (15) extending through said substrate (6) so that said magneto-resistor means (7) is disposed opposite to said magnetic body (3), said magneto-resistor means (7) being electrically connected to said circuit means (9) by conductors printed on said substrate (6).
Claim 9
Dependent Claim
62 words
A magnetoelectrical transducer as claimed in Claim 1, 2, 3, 4 or 7, wherein said magneto-resistor means (7) includes a pair of magneto-resistors (M 1 , M 2 ) to constitute a three-terminal magnetic field-intensity sensing structure for generating said first electrical output signal (V IN ) of sinusoidal waveform in response to a change in the intensity of said magnetic field.
Claim 10
Dependent Claim
77 words
A magnetoelectrical transducer as claimed in Claim 8, wherein said circuit means (9) includes resistor means (R 1 , R 2 ) having an adjustable resistance value and connected to said voltage source means to generate a reference voltage(V REF ), and a comparator (19) for generating said second electrical output signal (VOUT) of rectangular waveform in response to the application of said first electrical signal (V IN ) and said reference voltage (V REF ) thereto.
Claim 11
Dependent Claim
84 words
A magnetoelectrical transducer as claimed in Claim 8, wherein said circuit means (9) includes resistor means (R 1 , R 2 ) having an adjustable resistance value and connected to said voltage source means to generate a reference voltage (V REF ) ' and an amplifier (20) for generating said second electrical signal (V OUT ) of sinusoidal waveform having an amplified amplitude in response to the application of said first electrical signal (V IN ) and said reference voltage (V REF ) thereto.
References Cited (Backward Citations)
No citation records indexed.
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