| 摘要 |
PURPOSE:To make a circuit in small-size and to reduce a cost, by using a comb line filter for a color signal, which has been constituted of a delaying circuit of a narrow-band using a semiconductor, as a means for removing a crosstalk component of the color signal. CONSTITUTION:A low band converting color signal from an input terminal is frequency-converted to the bass band by a converting circuit 15, and is led to a mixer 21 through a band pass filter 16. Also, a low band converting color signal from an input terminal 1 is led to a 1H delaying circuit 17, furthermore is led to a converting circuit 18, and is frequency-converted to the base band. Its converted signal is led to a delaying circuit 20 through a band pass filter 19. The signal is phase-shifted by pi/2 by the delaying circuit 20, and is led to the mixer 21. When both the signals are added or subtracted respectively in the mixer 21, a signal from which a crosstalk component has been removed is obtained. |
