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实用新型
CN203039649U 一种调谐滤波器电路 失效 - 权利终止

一种调谐滤波器电路
摘要：
本实用新型涉及一种主要用于超短波频率范围内的调谐滤波器电路。由高频电感LF1、LF2、LF3、LF4、LF5、LF6、LF7、LF8、LF9，高频电容CF1、CF2、CF3、CF4、CF5、CF6、CF7、CF8、CF9，变容二极管CV1、CV2、CV3、CV4组成，高频信号从Pin端输入，经过对镜像信号滤波器后从Pout端输出，调谐电压VT控制着滤波器的中心频率，当改变调谐电压值时，滤波器的中心频率随之改变。有益效果是：能精确控制调谐滤波器的中心频率，获得最好的插入损耗指标。电路简单、可靠；电路实现灵活、可用于多种场合。
摘要（英）：

The utility model relates to a tuned filter circuit which is mainly used within the ultrashort wave frequency range. The tuned filter circuit is composed of high-frequency inductors LF1, LF2, LF3, LF4, LF5, LF6, LF7, LF8 and LF9, high-frequency capacitors CF1, CF2, CF3, CF4, CF5, CF6, CF7, CF8 and CF9, and variable capacitance diodes CV1, CV2, CV3 and CV4. A high-frequency signal is inputted from a Pin end, and is outputted from a Pout end after passing through an image signal filter. Tuning voltage VT controls center frequency of the filter. When the tuning voltage value is changed, the center frequency of the filter is changed. The utility model has beneficial effects as follows: by the adoption of the tuned filter circuit, the center frequency of the tuned filter can be accurately controlled and the best insertion loss index is obtained; the circuit is simple and reliable; and the circuit is flexible to realize and can be used in various occasions.

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