| 摘要 |
PURPOSE:To improve the performance of the titled circuit without deteriorating transient characteristics by connecting an amplifier provided with a low pass filter having a low frequency band to said circuit in addition to an amplifier with wide band and negatively feeding back the outputs of both the amplifiers to a main controlling circuit. CONSTITUTION:An input terminal of an amplifier 8 which has a wide band but comparatively low amplification degree is connected to the points right back of a main controlling circuit 7, namely stabilized DC output terminals 3, 4. One of input terminals of an amplifier 10 with comparatively large amplification degree is connected to output detecting terminals 5, 6 through dividing resistances R3, R4 and the other input terminal is connected to a basic electric power source REF. The amplifier 10 amplifies only low frequency and negative feedback through the amplifier 10 acts on only the low frequency and stabilizes up to commercial frequency band for the DC part of output voltage or close to the DC part. An amplifier 8 stabilizes output voltage over a wide frequency band and stabilizes the negative feedback amplification of the amplifier 10. |
