CONNECTION CIRCUIT AND LENS POSITION DETECTOR OF HALL ELEMENT, IMAGING ELEMENT POSITION DETECTOR, AND IMAGING DEVICE

摘要

PROBLEM TO BE SOLVED: To apply a simplified signal processing circuit to an imaging device or the like, capable of detecting the difference between Hall output voltages of two Hall elements without using a differential signal processing circuit. SOLUTION: An input terminal of the connection circuit is constituted by connecting a positive pole input terminal 1a of a first Hall element 1 and a positive pole input terminal 2a of a second Hall element 2 and by connecting a negative pole input terminal 1c of the first Hall element 1 and a negative pole input terminal 2c of the second Hall element 2. The output terminal of the connection circuit is composed of the negative pole output terminal 1d of the first Hall element 1 and the negative pole output terminal 2d of the second Hall element 2 connected to each other and two output terminals of the positive pole output terminal 1b of the first Hall element 1 and the positive pole output terminal 2b of the second Hall element 2. The difference between the Hall output voltages is detected by connecting the input terminals of the two Hall elements in parallel and connecting the output terminals in series in a subtractive manner, without using the differential signal processing circuit for detecting the difference between the Hall output voltages of the two Hall elements. COPYRIGHT: (C)2007,JPO&INPIT