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New Measurement Techniques for Portable Listening Devices: Technical Report - October 2013
A 116 dB SNR Multi-Bit Noise-Shaping DAC with 192 kHz Sample Rate
A new DAC architecture is presented that is capable of very high dynamic range. This new architecture uses a multi-bit sigma-delta converter together with noise-shaping scrambling and a current-steered output stage to achieve 116 dB SNR and 103 dB THD+N. The gain of the output stage is set by an external reference current, and thus can function as a current-controlled gain stage.
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