| 摘要 |
<p>Amplifier circuit having temperature compensation for a sensor for a state variable to be measured, which amplifier circuit comprises a temperature-sensitive element at least for temperature compensation of the sensitivity, a temperature-compensation circuit for the zero point and an output amplifier connected to the sensor. Starting from the one temperature-sensitive component mentioned, a first signal conditioner for generating the desired temperature signal for the sensitivity compensation is connected to the sensor and a second signal conditioner for generating the desired temperature signal for the zero-point compensation is connected to the output amplifier. The sensor may be a bridge sensor having one or more resistors which are sensitive to the state variable. The first input of the first signal conditioner is connected to a tapping point of a first resistor divider connected in series with the temperature-sensitive component across the first and second terminals of the supply voltage and the second input is connected to a reference voltage which is tapped off from a second voltage divider connected across the terminals of the supply voltage. The first input of the second signal conditioner is connected to the tapping point mentioned or to the output of the first signal conditioner and the second input is connected to the reference voltage mentioned. <IMAGE></p> |
