| 摘要 |
PURPOSE:To simply and inexpensively reduce the distortion of an instantaneous extension circuit for an amplitude compressed signal. CONSTITUTION:The amplitude compressed signal instantaneous extension circuit 23 makes a pair with an instantaneous compression circuit 13 having two diodes D11, D12 and a resistor R11. First to fourth diodes D21 to D24 having the same product number by the same manufacturer as the diodes D11, D12 are connected to a signal line in parallel and series. A 1st resistor R1 is connected in parallel a serial circuit consisting of a parallel circuit of the diodes D21, D22 and a parallel circuit of the diodes D23, D24. On the output side of the parallel circuit, a 2nd resistor R23 is connected to the signal line in parallel. When an original audio signal instantaneously extended is extracted from both ends of the resistor R23, its distortion due to the diodes D21, D22 is reduced by the diodes D23, D24 and a resistor R21. |
