| 摘要 |
PURPOSE: A tuning circuit in a tuner is provided to block 45~140MHz signals through a track of a VHF low band, thereby reducing input of strong electric field signals. CONSTITUTION: A distributing unit(110) distributes a first voltage that a power input unit provides. The distributing unit includes a second inductor(L2). A switching unit(120) compares a first voltage with a reference voltage wherein the distributing unit provides the first voltage. The switching unit cuts electricity off according to the comparison result. The switching unit comprises a first diode and a second capacitor(C2). A track unit(130) tracks the first voltage. The track unit comprises a first inductor(L1) and a first capacitor(C1). |
