In sound communication,it forms the ADC of 8 bit logarithm compression ratio,under the condition of dynamic signal range of 100 dB,the signal to noise ratio of the logarithm replacement type ADC reaches 31.2 dB.

• 在语音通信中构造出8位对数压缩律的ADC；在信号动态范围为100 dB的条件下；对数置换式ADC的信噪比高达31.；2 dB。