| 摘要 |
PURPOSE:To enable Algorithm of automatic control effectively. CONSTITUTION:In the circuit in which the coefficient value of the coefficient circuits 6A and 6B is digitally controlled so that the residual ghost in the video signal can be zeroed, the circuits 16A and 16B taking AND of each bit of the coefficient set circuits 14A and 14B and the circuits 17A and 17B taking AND through the inverter of each bit are connected, and the output of the AND circuits 16A, 16B, 17A, 17B is fed to the OR circuit 18. That is, the output of the OR circuit 18 produces output when either of coefficient values of the coefficient circuits 6A and 6B takes maximum or minimum value, to deive the flip flop circuit 21 and to control the count direction inversion circuits 22A and 22B. The output of the AND circuits 16A, 16B and 17A, 17B is fed to the gate circuits 23A, 23B and 24A, 24B as the signal inhibiting count-up or count-down. |
