Understanding Delta-Sigma Data Converters
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7 citations
Cites background or methods from "Understanding Delta-Sigma Data Conv..."
...Problem Statement Noise shaping is the central task of designing ∆Σ modulators [3]....
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...Especially, in the context of ∆Σ modulation, the value of ̟ is determined as ̟ = π OSR for low-pass modulators and ̟ = π 2×OSR for band-pass modulators, where OSR represents oversampling ratio [3]....
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...which is a standard setting for ∆Σ modulator design [3], [8]....
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...To solve this problem, an empirical but commonly-used strategy is to bound the H∞ norm of the NTF below a reasonable level [3], [8], [9], [24]....
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...∆Σ Modulator and Loop Filter Detailed description on ∆Σ modulators can be found in [3], and for convenience, we briefly introduce some related basic concepts here....
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7 citations
Cites background or methods from "Understanding Delta-Sigma Data Conv..."
...This way, a rescaling is performed by changing the individual coefficients but without affecting the overall NTF or STF [34]....
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...In most state of the art approaches, this is done by assuming an IB maximum stable amplitude and equalizing the internal nodes accordingly [34]....
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...Even though DSM design tools like [34] allow to scale the internal signal swings, this is done for a full-scale (FS) signals with a fixed frequency, and not for above full-scale OOB signals....
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...The coefficients for this modulator were generated with the “Delta-Sigma toolbox” [34] for a DT prototype, with a noise-gain of two, an oversampling-ratio (OSR) of 32, a 4-bit internal quantization; this DT modulator was subsequently converted into a CT architecture using a NRZ DAC waveform including an excess loop delay (ELD) of ....
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7 citations
7 citations
7 citations
Cites methods from "Understanding Delta-Sigma Data Conv..."
...In each pixel, we implemented the first-order current sensing modulator [25], [26] connector to the WE transductor element, as shown in Fig....
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References
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