| 摘要 |
PURPOSE:To ensure an adjustment of the compressibility and the compressing action range after installation of the divice by using the exponential function circuit and the mulitplication circuit as the gain control circuit. CONSTITUTION:The voltage and the output voltage which passed through line pilot selection filter 2, voltage limit circuit 6 and exponential function circuit 7 respectively and multiplied to each other by multiplication circuit 8 and then fed back. Thus, the level fluctuation is compressed. As a result, the compressibility can be varied freely for the pilot controlled automatic gain control adjuster by just changing the exponent of circuit 7. |
