EP0052981A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Hall element circuit arranged to eliminate in-phase voltage
Assignee: Toshiba Corp
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Filing: 1981-11-11
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Granted: —
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Expires: 2001-11-11
Abstract
Abstract An in-phase voltage elimination circuit in which a Hall element (11) has first and second control current input terminals (11a, 11b) and first and second output terminals (11c, 11d), the first and second control current input terminals (11a, 11b) fed with a control current and the first output terminal (11c) connected to one input terminal of an operational amplifier (13). The other input of the operational amplifier (13) is connected to ground, and the output terminal of the operational amplifier is connected to one of the first and second control current input terminals (11a, 11b). A Hall output is produced at the second outputterminal (11d) of the Hall element (13).
Inventors
- 👤 Kunihiko Matui
- 👤 Shikei Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 06:28
CPC Classifications
G; G01; G01R; G01R21/00; G01R21/08; G01R17/00; G01R17/02; G01R17/06; G01R33/00; G01R33/02; G01R33/06; G01R33/07
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
126 words
An in-phase voltage elimination circuit, characterized in that said circuit comprises: a Hall element (11) having first and second control current input terminals (lla, llb) and first and second output terminals (llc, lld); means (12, 22, 30) for supplying a control current to said Hall element (11) between said first and second control current input terminals (lla, llb); and an operational amplifier (13) having a first input terminal connected to reference potential, a second input terminal connected to said first output terminal (llc) of said Hall. element (11), and an output terminal connected to one of said first and second control current input terminals (lla, llb); wherein said Hall element (11) produces a Hall output at said second output terminal (lld) of said Hall element (11).
Claim 2
Dependent Claim
126 words
An in-phase voltage elimination circuit, characterized in that said circuit comprises: a Hall element (11) having first and second control current input terminals (lla, llb) and first and second output terminals (llc, lld); means (12, 22, 30) for supplying a control current to said Hall element (11) between said first and second control current input terminals (lla, llb); and an operational amplifier (13) having a first input terminal connected to reference potential, a second input terminal connected to said first output terminal (llc) of said Hall. element (11), and an output terminal connected to one of said first and second control current input terminals (lla, llb); wherein said Hall element (11) produces a Hall output at said second output terminal (lld) of said Hall element (11).
Claim 3
Dependent Claim
24 words
An in-phase voltage elimination circuit according to claim 1, characterized in that said first input terminal of said operational-amplifier (13) is connected to ground.
Claim 4
Dependent Claim
24 words
An in-phase voltage elimination circuit according to claim 1, characterized in that said control current supplying means (12, 22) is a constant current source.
Claim 5
Dependent Claim
36 words
An in-phase voltage elimination circuit according to claim 1, characterized in that said control current supplying means (30) is a constant voltage power source connected between said first and second control current input terminals (lla, llb).
Claim 6
Dependent Claim
46 words
An in-phase voltage elimination circuit according to claim 1, characterized in that said control current supplying means (12, 22) comprises a converter (31, 32, 33) for converting load voltage into constant control current and then for feeding the constant control current to said Hall element (11).
Claim 7
Dependent Claim
117 words
An in-phase voltage elimination circuit characterized in that said circuit comprises: a Hall element (11) having a pair of control current input terminals (lla, llb) and a pair of output terminals (llc, lld); a power source (12, 22, 30) for feeding a control current between said pair of control current input terminals (lla, llb) of said Hall element (11); and an operational amplifier (13) having a first input terminal connected to reference potential, a second input terminal connected to one of said output terminals (llc, lld) of said Hall element '(11) to produce a Hall output voltage at the other output terminal of said Hall element (11), and an output terminal connected to said power source (12).
Claim 8
Dependent Claim
117 words
An in-phase voltage elimination circuit characterized in that said circuit comprises: a Hall element (11) having a pair of control current input terminals (lla, llb) and a pair of output terminals (llc, lld); a power source (12, 22, 30) for feeding a control current between said pair of control current input terminals (lla, llb) of said Hall element (11); and an operational amplifier (13) having a first input terminal connected to reference potential, a second input terminal connected to one of said output terminals (llc, lld) of said Hall element '(11) to produce a Hall output voltage at the other output terminal of said Hall element (11), and an output terminal connected to said power source (12).
Claim 9
Dependent Claim
22 words
An in-phase voltage elimination circuit according to claim 6, characterized in that said power source (12, 22) is a constant current source.
Claim 10
Dependent Claim
102 words
An in-phase voltage elimination circuit according to claim 7, characterized in that said constant current source (12) comprises: an operational amplifier (31) having an inverted input terminal connected to one of control current input terminals (lla, llb) of said Hall element (11), an output terminal connected to the other control current input terminal of said Hall element (11); and a constant voltage power source (32), one terminal of which is connected to said inverted input terminal of said operational amplifier through a resistance (33), and the other terminal of which is connected to a non-inverted input terminal of said operational amplifier (31).
Claim 11
Dependent Claim
103 words
An in-phase voltage elimination circuit according to claim 7, characterized in that said constant current source (12) comprises: an operational amplifier (31), an output terminal of which is connected to one of control current input terminal (lla, llb) of said Hall element (11); and a constant voltage power source (32), one terminal of which is connected to one of input terminals of said operational amplifier (31), and the other terminal of which is connected to the other control current input terminal of said Hall element (11) and also connected to the other input terminal of said operational amplifier (31) through a resistance (33).
Claim 12
Dependent Claim
32 words
An in-phase voltage elimination circuit according to claim 6, characterized in that said power source (30) is a constant voltage source connected between said pair of control current input terminals (lla, 11b).
Claim 13
Dependent Claim
25 words
An in-phase voltage elimination circuit according to claim 6, characterized in that said first input terminal of said operational amplifier (13) is connected to ground.
References Cited (Backward Citations)
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