KMZ10A1 データシートの表示（PDF） - Philips Electronics

部品番号

コンポーネント説明

メーカー

KMZ10A1

Magnetic field sensor

Philips Electronics 

Philips Semiconductors

Product specification

Magnetic field sensor

KMZ10A1

APPLICATION INFORMATION

A problem with measuring weak magnetic fields is that precision is limited by drift in both the sensor and amplifier offset.

In these instances, it is possible to take advantage of the ‘flipping’ characteristics of the KMZ10 series to generate an

output that is independent of offset. The sensor, located in a coil connected to a current pulse generator producing

magnetic field pulses periodically reversed by alternate positive and negative going current pulses, is continually flipped

from its normal to its reversed polarity and back again. The polarity of the offset however, remains unchanged, so the

offset itself can be eliminated by passing the output signal through a filter circuit.

handbook, full pagewidth

Hx

coil

,, ,,Hy

sensor

1 234

(a)

current

Vo

Mx

offset

Hy

Mx

(c)

polarization

Vo

offset

time

MBC925

(b)

(a) Set-up.

(b) Pulse diagram.

(c) Sensor output characteristics.

Fig.8 Measuring weak magnetic fields with the KMZ10A1.

1998 Apr 06

6

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