| 摘要 |
PURPOSE:To eliminate oscillation at various frequency bands of an amplifier in an excellent way by providing an equivalent short-circuit point to a reception signal frequency and connecting a resistance element between the short-circuit point and a grounding point. CONSTITUTION:The equivalent short-circuit point 11 is provided to a reception signal frequency connected to the input line 2 of a low noise amplifier A. The resistance element 13 is connected between the short-circuit point 11 and the grounding point 12. Looking for a frequency signal other than the received signal frequency, the line 2 is terminated by an open stub 10 and the element 13 and the gain of the amplifier A is suppressed to the frequency signal other than the reception signal frequency. Thus, the oscillation at various frequency bands of the amplifier A is eliminated in an excellent way.
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