| 摘要 |
PURPOSE: To provide a circuit for suppressing a parasitic signal following a local oscillation signal. CONSTITUTION: A first DC breaker 60 constituted of a micro strip line is connected to the output terminal of a phase fixing oscillator 10 with an ultrahigh frequency. A first low pass filter 70 whose output is connected to the input terminal of an amplifier 40 is connected. The DC power of amplification is supplied. A second DC breaker 61 and a second low pass filter 71 are connected to the output terminal of the amplifier 40 in the same system as the input terminal. The DC power of the amplifier 40 is supplied, the parasitic signal is suppressed and only a main signal is made to pass through. Since a band pass filter is not used, not only the circuit is simplified but also 78 mechanism can be reduced. Thus, the economy of a device can be improved. |
