| 摘要 |
PURPOSE:To obtain an OCL adapter circuit for connection from a one-power- source to a two-power-source amplifying circuit by using amplifiers which each operate by two power sources and a servo-amplifier in combination. CONSTITUTION:The amplifiers 1 and 2 each operate by two power-sources and an amplifier 1 is the servo-amplifier for suppressing the DC drift of the amplifier 1. The output of the one-power-source amplifying circuit is connected directly to the uninverted input terminal 3 of the amplifier 1 without using any capacitor. A terminal 5 is connected to a positive power source when the potential at the input terminal 3 is positive or to a negative power source when negative. Resistances 12 and 13 are determined by the gain of an AC component, and resistances 16 and 17 are equalized in value so that an inverted input terminal 19 is at the same potential with the uninverted input terminal 3. Thus, the OCL adapter circuit for connection from the one-power-source amplifying circuit to the two-power-source amplifying circuit is obtained. |
