F. Blockin
نویسندگان
چکیده
An audio band sigma-delta ADC based on a new time-interleaved !! scheme is described. The circuit achieves a very low power operation with the large dynamic range required for audio applications. This modified two channel timeinterleaved scheme improves the power efficiency thanks to halved operating frequency in the paths, and a reduced number of levels in ADC and DAC. This sigma-delta modulator fabricated in a 0.18 !m CMOS process uses 1.8 V supply and ±0.5 V input range. Experimental results show that with a -35 dBFS input sine wave there are no tones above a -110 dB noise floor.
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Ììì Ù×× Óó Ððòòùù×øø Ôööööööò Ñóðððòò ××× Óò ¾¹øùôðð× Òò Ùöö×øø Blockin× ×××ö Blockin× Óö Ñôöóúúòò Òøøöôöö×× Ôöó Blockin Blockin××××
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Detector + n k a k y k â k-+ – n k M-i0 p i y k BLOCKINi 2 M-i0 q i y k BLOCKINi 2 y k y k y k y k a k f 0 a k BLOCKIN1 f 1 à a k BLOCKIN-f-y k BLOCKIN1 y k BLOCKIN1 ˆ a k BLOCKIN-BLOCKIN1 f-a k BLOCKIN1 f 0 à a k BLOCKIN-f-BLOCKIN1 y k BLOCKIN-y k BLOCKIN-M-j1 ˆ a k BLOCKIN-BLOCKINj f j a k BLOCKIN-f 0 M-i0 w i y k BLOCKINi Fig. 1. A linear AWGN channel with a decision feedback detector. Abstr...
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