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COMPENSATION CIRCUIT FOR OFFSET VOLTAGE IN A MEASUREMENT AMPLIFIER AND/OR FOR DC-SIGNAL COMPONENT IN A MEASUREMENT SIGNAL
COMPENSATION CIRCUIT FOR OFFSET VOLTAGE IN A MEASUREMENT AMPLIFIER AND/OR FOR DC-SIGNAL COMPONENT IN A MEASUREMENT SIGNAL
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机译：测量放大器中失调电压的补偿电路和/或测量信号中的直流信号分量的补偿电路
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摘要
A circuit for the compensation of an offset voltage in a measurement amplifier and/or of a DC-signal component contained in a measurement signal is provided. The circuit comprises a measurement-signal terminal for the measurement signal. The non-inverting input of the measurement amplifier serves for the feeding in of an AC-signal component of the measurement signal via a first capacitor. Additionally, the circuit contains a second amplifier for the addition of the DC-signal component in the measurement signal and of a signal corresponding to the negative offset voltage and to the negative DC-signal component, and a unit arranged at the input end or output end of the measurement amplifier for subtraction of an output signal of the second amplifier from the AC-signal component of the measurement signal.
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