| http://www.w3.org/ns/prov#value | - The operational amplifier apparatus includes an operational amplifying section for outputting to the output terminal a voltage corresponding to (V2-V1), where V1 in the voltage in the first input terminal, V2 is the voltage in the second input terminal and k is a constant, and a current supply section for supplying a current corresponding to the difference between the voltage in the first input te
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