| 摘要 |
PURPOSE:To output a signal with good S/N and linearity by controlling the amplification factor of an amplifier provided to an input side and an output side of a delay element depending on a signal in response to an input level and a signal retarding the former signal. CONSTITUTION:A video signal inputted to an input terminal 6 is inputted to a variable amplifier 8 and a level detector 7, amplified by the amplification factor in response to the input level and inputted to a delay element 9. Then the delay element is driven by a clock inputted from a clock input terminal 12, a video signal subjected to delay or time axis compression/expansion is outputted from the output, the result is inputted to a variable amplifier 14 through a low-pass filter 11, amplified by the variable amplifier 14 and outputted from an output terminal 15. On the other hand, a control signal outputted from the level detector 7 controls the variable amplifier 8, is inputted to a delay element 10, and controls the variable amplifier 4 after passing through a low pass filter 13. |
