Patent ID: 7212136
Filing Date: 2007-05-01
Classification: H03M

Abstract:
1. A recursive bit-stream converter for converting a multi-bit digital input signal to a single bit digital output signal, said converter comprising, in a feedback loop, means (F) for low pass filtering said input signal and producing digital filtered words, quantizer means for quantizing said filtered words and means for applying the quantized filtered words through feedback means (M 1 –M 10 , B 0 –B 5 ) to the low pass filtering means (F) and further comprising outside of said feedback loop means for parallel to series conversion of the quantized filtered words to produce the single bit digital output signal, characterized in that the quantizer means comprise at least two quantizers (Q 2 , Q 3 ) of different bits whose output words are successively parallel to series converted (P 2 , P 3 ) to produce the output signal (O) and synchronously therewith successively applied to said feedback means.