PRELIMINARY

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Figure 14

System Operation with hidden hysteresis

S (N)

N (S)

Pin 1 (Vs)

Pin 3 (Q)

B2

B1

Branded Side

Crankshaft Wheel Profile

Large airgap

Small airgap

Magnetic Field Difference

∆B=B1-B2

Output Signal

Enabling point for releasing output: B1-B2>

∆B

Enabling point for operate point: B1-B2<

∆B

∆B

∆B

∆B

Outside of a permanent magnet the magnetic induction (=flux density)

points from north to the south pole. It is common to define positive flux

if the south pole of a magnet is on the branded side of the IC. This is equivalent to the

north pole of the magnet on the rear side of the IC.

∆B

∆B

Hidden Hysteresis

∆B