| 摘要 |
PURPOSE:To continue the function of an amplifying circuit by foreseeing the trouble of the amplifying circuit, by comparing the outputs from two detection circuits to detect a non-equilibrium degree. CONSTITUTION:The monitor signals from a part of the output circuits of the mu-circuits 3a, 3b of an amplifier are detected by detection circuits 7a, 7b and compared with each other by a comparing circuit 8 while the comparing signal is taken out as detection output DET. Therefore, when the outputs of the mu- circuits 3a, 3b of the amplifier connected in parallel are almost equal, since the detection output becomes equilibrium by the circuit 8, the output DET is not detected but, when said detection output becomes non-equilibrium, a signal component appears as the detection output DET. Therefore, by monitoring the output DET, the state of the mu-circuits is grasped and, by taking a preventive measure on the basis of a circuit state, the function of the amplifying circuit can be continued.
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