Hall element control circuit
AssigneeON Semiconductor Trading, Ltd.
InventorsTakeshi KURA, Hiroyuki Tsuda, Tomonori Kamiya, Hiroki Nagai
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Abstract
A first terminal supplies the bias voltage to a high-potential-side input terminal of a hall element. A second terminal supplies the ground potential to a low-potential-side input terminal of the hall element. A P-channel type transistor is configured such that the source terminal is connected to the power supply potential and the drain terminal is connected to the first terminal. An operational amplifier differentially amplifies the voltage between a predetermined set voltage and the voltage at the first terminal so as to control the gate voltage of the P-channel type transistor.
Claims6
A hall element control circuit, connected to a hall element via a wiring member, for controlling the hall element, the hall element control circuit comprising:
- a first terminal for supplying a bias voltage to a high-potential-side input terminal of the hall element;
- a second terminal for supplying a ground potential to a low-potential-side input terminal of the hall element;
- a first transistor whose source terminal is connected to a power supply potential and whose drain terminal is connected to said first terminal;
- and
- an operational amplifier for controlling a gate voltage of said first transistor by differentially amplifying a voltage between a predetermined set voltage and a voltage at said first terminal.
Dependencies are inferred from the claim text.