| 摘要 |
PURPOSE: An intermediate frequency trap circuit for preventing interference of a neighboring channel is provided to eliminate an interference of a neighboring channel by using a simple intermediate frequency trap circuit during intermediate frequency conversion of a digital television receiver. CONSTITUTION: A first resonant circuit(C1,L1) is installed between a first output terminal of a tuning unit and a first input terminal(P3) of a demodulation unit(P1). The first resonant circuit filters a first neighboring channel signal from an intermediate frequency signal converted by the tuning unit. The second resonant circuits(C2,L2) are installed between a second output terminal(P2) of the tuning unit and a second output terminal(P4) of the demodulation unit. The second resonant circuits filter a second neighboring channel signal from the intermediate frequency signal which is converted by the tuning unit. |
