| 摘要 |
PURPOSE: A double conversion tuner capable of the removal of bits is provided to remove an intermodulation bit by a low channel disturbance signal when receiving an RF(Radio Frequency) signal of a high channel by adding a bit removing circuit between an automatic gain controller and an RF amplifier and bypassing the RF signal of the low channel to the ground. CONSTITUTION: A bit removing circuit(100) connects between an automatic gain controller(1) and an RF amplifier(2) for removing an RF signal of a low channel when receiving the RF signal of a high channel. The bit removing circuit(100) is turned off when receiving the RF signal of the low channel according to an external control for passing the RF signal, and is turned on when receiving the RF signal of the high channel for bypassing the RF signal of the low channel included in the RF signal of the high channel to the ground.
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