Rf amplifier for tuner

阅读:950发布:2021-09-10

专利汇可以提供Rf amplifier for tuner专利检索,专利查询,专利分析的服务。并且PURPOSE:To ensure a common use of the amplifier element of both the VHF and UHF bands with one unit, by supplying the output of a VHF and UHF antenna tuning circuit to the input of an RF amplifier element via an element having an impedance that is small or large for the VHF band signal. CONSTITUTION:The VHF band signal is applied to the FET1 via the coupling capacitor C1 as well as the inductor L1 having an impedance that is small enough to the VHF band signal. At the same time, the UHF band signal is applied to the FET1 via the capacitor C3 having an impedance large enough to the VHF band signal. Thus the capacitor C3 has a large impedance when the VHF band signal is amplified, preventing the loss caused by the capacitor C3. On the other hand, the impedance of the coil L1 and the capacitor C1 respectively increases when the UHF band signal is amplified. The UHF band signal is applied to the FET1 with no loss.,下面是Rf amplifier for tuner专利的具体信息内容。

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