| 摘要 |
PURPOSE: A differential amplifier circuit is provided to change the differential signal gain of an amplifier without complicated correction processes of circuit resistors. CONSTITUTION: A first resistor(222) connects the first positive input terminal of a first operational amplifier with a first signal. A second resistor(224) is connected to the first positive input terminal of the first operational amplifier. A gain converting unit(300) is connected between the second resistor and the first output terminal of the first operational amplifier. A third resistor(226) connects the first negative input terminal of the first operational amplifier with a second signal(V2). A fourth resistor(228) connects the first negative input terminal of the first operational amplifier with a second reference voltage(Vr2). |
