| 摘要 |
PURPOSE:To stably operate the control system, by detecting the stability of the control system from the reflection coefficient of echo and correcting the control variable based on this detected output. CONSTITUTION:The intermediate frequency output signal is output via the synthesis circuit 2, amplitude limit circuit 3 and frequency discriminating circuit 4. Further, the echo distortion suppression circuit consists of the closed loop made up with the synthesis circuit 2, tapped delay circuit 8, weighting circuit 9, and synthesis unit 2. The calculation circuit 7 calculates the reflection coefficient with the output of the amplitude detector 6 and the circuit 4. The stability detection circuit 10 discriminates the stability from the result of calculation, operating the control system stably with the limit to the operation of the circuit 9. |
