Filter circuit
专利汇可以提供Filter circuit专利检索，专利查询，专利分析的服务。并且PURPOSE:To prevent distortion through variation in resonance frequency by connecting a series resonance circuit including a varactor diode between a signal path in the wide-ban BPF of a converter tuner for cable television and an earth point and applying a channel selection voltage to the diode. CONSTITUTION:A trap circuit 4 is connected between the earth point and signal path between the wide-band BPF2 formed in the input circuit of the converter tuner for cable television and a nonlinear circuit 3 such as a frequency converter. The trap circuit 4 consists of the series resonance circuit of inductances L1 and L2, capacitors c1 and c2, and varator diodes D1 and D2. The varactor diodes D1 and D2 are applied with the channel selection voltage VT through resistance R and R. Consequently, the passing band width of the filter consisting of the BPF2 and trap circuit 4 is narrowed down and the number of input signals to the nonlinear circuit is decreased to reduce intermodulation distortion, cross modulation disturbance, etc.，下面是Filter circuit专利的具体信息内容。
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