xxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx x xxxxxxxxxxxxxx xxxxxxxxxx xxx xxxxxx xxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxx

xxxxx xxxxxx xx xxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxx xxxxxxx xxxxxxxxxxxxxxxxxxx

xxxxxxxxxxxxxxxx xxxxxxxxxxxxxx xxxxxx xx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxx xxxxx x x

Fig 1.

Functional diagram

cosine

bridge

MR-SENSOR

ELEMENT

sine

bridge

INSTR.- AMP.

BUFFER 1

MISC

DIAGNOSTICS

DIGITAL PART

ΣΔ-MODULATOR

−

006aaa296

BIAS

+1

COUNTER

DEC.-FIL.

CALIBRATION

MICROCONTROLLER

+/−/AND/OR

OSC, OSCFS

TEMP.

SENSOR

AUX. ADC

REVERSE

POLARITY

PROTECTION

OVER-VOLTAGE

AND

REVERSE POLARITY

PROTECTION

VOLTAGE

LIMITER

SERIAL

INTERFACE

WATCHDOG-

TIMER

EEPROM

ROM

HV-

PROTECTION

BUFFER 2

H(z)

INSTR.- AMP.

ΣΔ-MODULATOR

RESISTOR-

STRING D/A

−

ANALOG OUTPUT STAGE

ANALOG INPUT STAGE

H(z)

DEC.-FIL.

CS

GND

DATA/OUT1

CLK/OUT2