| 摘要 |
PURPOSE:To make circuit integration easy with a simple constitution, by controlling a delay amount of a delayed multivibrator inputting as reproduced angular modulation wave in rsponse to a time axis error signal. CONSTITUTION:An FM input being a reproduced RF (high frequency) signal is limited for the amplitude with a limiter 1 and becomes a rectangular wave signal and is inputted to the 1st stage circuit of delayed multivibrators 2-1-2-n in cascade connection of (n) sets (where; (n) is a natural number) at the next stage. An output of the final stage circuit 2-n is inputted to an FM detector 3 for FM detection and demodulated into, e.g. a color video signal via an LPF4. A time axis error signal Ve of a reproducing signal is applied to the base of a transistor Q3 of a current source of each delayed multivibrator and a current I0 of the current source is controlled with the level of this signal Ve. |
