In-phase voltage elimination circuit for Hall element
First Claim
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1. An in-phase voltage elimination circuit comprising:
- a Hall element having first and second control current input terminals and first and second output terminals, said second control current input terminal being connected to neither of said first and second output terminals;
means for supplying a control current to said first control current input terminal of said Hall element; and
an operational amplifier having a first input terminal connected to reference potential, a second input terminal connected to said first input terminal of said Hall element, and an output terminal connected to second control current input terminal of said Hall element;
wherein said Hall element produces a Hall output at said second output terminal of said Hall element.
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Abstract
An in-phase voltage elimination circuit in which a Hall element has first and second control current input terminals and first and second output terminals, the first and second control current input terminals fed with a control current and the first output terminal connected to one input terminal of an operational amplifier. The other output of the operational amplifier 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. A Hall output is produced at the second output terminal of the Hall element.
15 Citations
11 Claims
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1. An in-phase voltage elimination circuit comprising:
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a Hall element having first and second control current input terminals and first and second output terminals, said second control current input terminal being connected to neither of said first and second output terminals; means for supplying a control current to said first control current input terminal of said Hall element; and an operational amplifier having a first input terminal connected to reference potential, a second input terminal connected to said first input terminal of said Hall element, and an output terminal connected to second control current input terminal of said Hall element;
wherein said Hall element produces a Hall output at said second output terminal of said Hall element. - View Dependent Claims (2, 3, 4, 5)
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6. An in-phase voltage elimination circuit comprising:
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a Hall element having a pair of control current input terminals and a pair of output terminals, said control current input terminals being disconnected from said output terminals; a power source for feeding a control current between said pair of control current input terminals of said Hall element; and an operational amplifier having a first input terminal connected to reference potential, a second input terminal connected to one of said output terminals of said Hall element to produce a Hall output voltage at the other output terminal of said Hall element, and an output terminal connected to said power source. - View Dependent Claims (7, 8, 9, 10, 11)
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Specification