| 摘要 |
PURPOSE: A folding interpolation analog-digital converter is provided to process signals in a current mode by using a transistor and a resistor only without changing the conventional reference digital CMOS process. CONSTITUTION: The folding interpolation analog-digital converter of high speed and low electric power comprises a plurality of folding sections (1¯4) for receiving and pre-processing an analog signal (Ain) into folding signals of a sinewave having multi-cross points to output as a pair of positive and negative waves, an interpolation section (5) for outputting extra folding signals having cross points of even intervals from the folding signals generated from the two adjacent folding sections of the folding sections (1¯4), a comparison section (6) for comparing the pair of folding signals of the interpolation section (5) with the reference signal to output a lower-leveled signal, an upper-bit AD converting section (7) for comparing the analog signal (Ain) with the reference signal to output an upper-bit signal, a delayed time error correction section (8) for detecting a delay difference between the lower-bit signal outputted from the comparison section (6) and the output signals of the upper-bit AD converting section (7), and a digital encoder (9) for outputting a digital signal (Dout) encoded by receiving the output signal of the comparison section (6).
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