AMPLIFYING CIRCUIT

申请公布号：JPS5916404(A)

申请号：JP19820125366

申请日期：1982.07.19

申请公布日期：1984.01.27

申请人：

NIPPON DENSHIN DENWA KOSHA

发明人：ISHIHARA NOBORU;AKAZAWA YUKIO;OBARA MAMORU

分类号：H03F1/42;H03G5/10;H03H11/48

主分类号：H03F1/42

摘要：PURPOSE:To obtain stably an optional peaking or tuning characteristics, by providing a new control terminal to adjust optionally a capacitor, in a peaking amplifying circuit or a tuning amplifying circuit using the capacitor. CONSTITUTION:A series feedback amplifying circuit is constituted with an input transistor(TR) 6, a load resistor 7, and a series feedback resistor 8. A TR18 is a transistor for adjusting amount of peaking and a diffusion capacitance between the base and the emitter is used as a peaking capacitance. Since the peaking capacitance is proportional to a current IP flowing the TR18 in this case, the peaking capacitor is changed by changing the current IP. A TR24 is a transistor to control the current IP and is provided with a control voltage input terminal 25.

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