Patent ID: 7391206

Claim:
A magnetic detection circuit, comprising: a bridge circuit including two bridge sections arranged between a current-source terminal and a grounding terminal, each of a first bridge section and a second bridge section of the bridge circuit including a magnetic detection element; wherein, in both the first bridge section and the second bridge section, the magnetic detection element is arranged, with respect to output-signal output points, on only one of (a) a side that includes the current-source terminal and (b) a side that includes the grounding terminal; wherein the output-signal output points are connected with differential input points of a comparator; wherein the comparator is configured to feed back an output signal via a feedback resistor to one of the bridge sections; wherein the first bridge section includes a first fixed resistor and an adjustable resistor, a first terminal of the first fixed resistor connected to a terminal of the magnetic detection element of the first bridge section, a second terminal of the first fixed resistor connected to the adjustable resistor; and wherein the second bridge section includes a second fixed resistor and a third fixed resistor, a first terminal of the second fixed resistor connected to a terminal of the magnetic detection element of the second bridge section, a second terminal of the second fixed resistor connected to the third fixed resistor.