| 摘要 |
PURPOSE:To hold a normal lead-in state stably, by adding a control circuit, which detects a false lead-in state to reset tap coefficients, to an automatic equalizer. CONSTITUTION:A delayed signal and a signal which is not delayed are added by an adding circuit 7. The output of the adding circuit 7 is inputted to a discriminating circuit 8 having two threshold levels. A counter 9 is counted up by the output of the discriminating circuit 8. When counted up n-number times, the counter 9 discriminates false lead-in of an automatic equalizing circuit 2 and outputs a signal (f) which resets tap coefficients of the automatic equalizing circuit 2 to control a delay circuit, and every tap coefficient is reset to the initial state, and the counter itself is reset also. |
