TLE 4905 L; TLE 4935 L;

TLE 4935-2 L; TLE 4945 L; TLE 4945-2L

Semiconductor Group

3

1997-09-01

Circuit Description

The circuit includes Hall generator, amplifier and Schmitt-Trigger on one chip. The

internal reference provides the supply voltage for the components. A magnetic field

perpendicular to the chip surface induces a voltage at the hall probe. This voltage is

amplified and switches a Schmitt-trigger with open-collector output. A protection diode

against reverse power supply is integrated. The output is protected against electrical

disturbances.

Figure 2

Block Diagram

AEB01243

Hall-

Generator

V

S

V

Ref

Output

Stage

Schmitt-

Trigger

Amplifier

Threshold

Generator

V

S

1

Q

3

2

GND