| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a amplifier receiving a channel exclusively and provided with an AGC in which noise and jamming waves on the outside of a band can be suppressed efficiently through a simple and inexpensive arrangement. <P>SOLUTION: The amplifier receiving a channel exclusively comprises a first frequency converting section for converting a television signal having an original frequency into an intermediate frequency signal having a lower frequency, a signal processing section for processing the intermediate frequency signal being outputted from the first frequency converting section, and a second frequency converting section for converting the frequency of the intermediate frequency signal passed through the signal processing section and outputting a television broadcast signal. The first frequency converting section performs frequency conversion using a high frequency signal generated from a first local oscillator and the second frequency converting section performs frequency conversion using a high frequency signal generated from a second local oscillator or the first and second frequency converting sections perform frequency conversion using a high frequency signal generated from the first local oscillator selectively. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
