Design and Implementation of a Hardware-efficient Novel Digital Interpolation Filter Applied to Stereo Audio Sigma-Delta DAC

Liu  Su-Juan; Zhang  Te; Chen Jian-Xin

doi:10.3724/SP.J.1146.2010.00587

Volume 33 Issue 3

Mar. 2011

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Article Navigation > Journal of Electronics & Information Technology > 2011 > 33(3): 749-753

Liu Su-Juan, Zhang Te, Chen Jian-Xin. Design and Implementation of a Hardware-efficient Novel Digital Interpolation Filter Applied to Stereo Audio Sigma-Delta DAC[J]. Journal of Electronics & Information Technology, 2011, 33(3): 749-753. doi: 10.3724/SP.J.1146.2010.00587

Citation:

Liu Su-Juan, Zhang Te, Chen Jian-Xin. Design and Implementation of a Hardware-efficient Novel Digital Interpolation Filter Applied to Stereo Audio Sigma-Delta DAC[J]. Journal of Electronics & Information Technology, 2011, 33(3): 749-753. doi: 10.3724/SP.J.1146.2010.00587

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Design and Implementation of a Hardware-efficient Novel Digital Interpolation Filter Applied to Stereo Audio Sigma-Delta DAC

doi: 10.3724/SP.J.1146.2010.00587

Liu Su-Juan^{* 张特陈建新
,},
Zhang Te,
Chen Jian-Xin

Received Date: 2010-06-08
Rev Recd Date: 2010-10-15
Publish Date: 2011-03-19

Abstract

Abstract

A novel design method for hardware-efficient digital interpolation filter applied to stereo audio Sigma- Delta Digital-to-Analog Converter (- DAC) is proposed in this paper. The method proclaims a new structure of multiplexing the interpolation filter by the left and right channel. The reorder technique is presented to keep the two channels being completely synchronization after multiplexing. The design is fabricated on TSMC 0.18m 1.8 V/3.3 V 1P5M CMOS process. The measurement results show that the DAC achieves 106 dB SNR over the 20 kHz audio band. The digital part of chip occupies only 0.198 mm2 and dissipates only 0.65 mW power. This design method benefits low chip area and power consumption and leaves much more design margin to the analog part of the - DAC, which provides important significance in mixed-signal system design.
- Sigma-Delta Digital-to-Analog Converter (- DAC),
- Interpolation filter,
- Dual-channel multiplexing,
- Reorder technique

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References

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