| 摘要 |
PURPOSE:To widen a band without limiting the type of a coupled circuit by composing a mu circuit (nonfeedback amplifier) of a multiple loop feedback amplifier, connecting the input side of the beta circuit (feedback circuit) of one hybrid feedback amplifier to the output side of the mu circuit of the other hybrid feedback amplifier, and using a hybrid feedback transformer and a push-pull constitution transformer in common. CONSTITUTION:An input-side push-pull and hybrid transformer is denoted as 7 and an output-side push-pull and hybrid transformer is denoted as 8. The input/ output side of the beta circuit 21 of the 1st hybrid feedback amplifier is connected to the input/output side of the mu circuit 12 of the 2nd hybrid feedback amplifier through matching resistances Rn 11 and Rn 21, and the input/output side of the beta circuit 22 of the 2nd hybrid feedback amplifier is connected to the input/output side of the mu circuit 11 of the 1st hybrid feedback amplifier through matching resistances Rn 12 and Rn 22. Consequently, the push-pull transformer and hybrid transformer are used in common and the mu circuits 11 and 12 are composed of a multiple loop feedback amplifier, so local feedback is realized and various active circuits are applied to the beta circuit. |
