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π形网络耦合高频放大电路是一种频带较宽的LC放大电路。它的主要特点是:电路结构简单、频带较宽、增益较高、实现阻抗匹配和调试均较方便等。它既可用于电视接收机的高放和图象中放电路,也可用于其他电子设备。当用于高放电路时,性能虽比双调谐放大电路稍差,但具有结构简单、转换频道时接触点较少和能减轻本振辐射等优点。若用于图象
π-shaped network coupled high-frequency amplifier circuit is a wide band LC amplifier. Its main features are: circuit structure is simple, wide band, high gain, impedance matching and debugging are more convenient. It can be used for high-level television receiver and the image in the discharge circuit can also be used for other electronic devices. When used in high-discharge circuit, although the performance is slightly worse than the double-tuned amplifier circuit, it has the advantages of simple structure, fewer contact points when switching channels and reduction of local oscillator radiation. If used for images