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Abstract

This describes a differential amplifier for producing an output current proportional to the differential input voltage regardless of the common-mode input voltage and comprises two identical voltage networks coupled between differential voltage inputs and to common differential current outputs and a common bias circuit. The described transmission line circuit operates as a transmission line receiver circuit with a high degree of common-mode rejection that will work in a high input signal voltage environment and in which both true and complement outputs can be developed such that their signal responses are additive and their common-mode responses subtractive. The circuit thus converts the input voltage to an input current while isolating the sensing circuit from common-mode input voltages which may be in excess of the breakdown voltage of the individual components of the circuit and the power supplies powering up the sensing circuit.

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