| 摘要 |
PROBLEM TO BE SOLVED: To emphasize a high frequency reproduced signal while cutting off noise in a high frequency range when reproducing audio signals by generating a clipped signal for cutting off signals between the prescribed levels of high-pass filtered regenerative signal from a clipper part, overlapping the clipped signal and regenerative signal at an adder and emphasizing the high frequency signal. SOLUTION: The anode terminal voltage of a diode D1 at a clipper part 34 is assumed as V. In this case, when a voltage at the cathode terminal of the diode D1 as the input terminal of the clipper part 34 is settled within the value of V±0.6V, the signal to be inputted to the clip part 34 can not be conducted through diodes D1 and D2 but cut off. When the V is set to 0V, the clip part 34 cuts off the signal component of ±0.6v from the input signal. This, the high frequency noise is removed. |
