Especially, the sampling value which dispersed timewise being the cascade shigumaderuta modulator in order to convert to the fit analog signal with the digital radio communication receiving device,The error signal of the sigma delta modulator of the cascade is supplied by the next sigma delta modulator of the respective particular cascade,As for the aforementioned error signal in the cascade shigumaderuta modulator of the type which is something which displays quantization noise,The ith sigma delta modulator of the cascade (M2 and M3.) the sigma delta modulator of the i-1 turn eye which addition, precedes in the decision vessel (M1 and M2.) output signal yi-1 (k) is supplied.
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