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15.3 A 115dB-DR audio DAC with −61dBFS out-of-band noise ...
https://ieeexplore.ieee.org/document/7063033#:~:text=Abstract%3A%20Out-of-band%20noise%20%28OBN%29%20is%20troublesome%20in%20analog,in%20sampling%20circuits%20like%20ADCs%20and%20class-D%20amplifiers.
Out-of-Band Noise and Filtering for PCM DAC
https://www.ti.com/lit/an/slea048/slea048.pdf
Figure 2 shows frequency response of DAC internal analog LPF, it has 100-kHzpass bandwidth, noise spectrum from fs/2 to fs band could not removed. Therefore, DAC outputs converted audio signal with out-of-bandnoise which is given as total performance of delta-sigmaquantization noise and internal analog LPF performance. Figure 1.
15.3 A 115dB-DR audio DAC with −61dBFS out-of-band …
https://ieeexplore.ieee.org/document/7063033
Out-of-band noise (OBN) is troublesome in analog circuits that process the output of a noise-shaping audio DAC. It causes slewing in amplifiers and aliasing in sampling circuits like ADCs and class-D amplifiers. Nonlinearity in these circuits also causes cross-modulation of the OBN into the audio band. These mechanisms lead to a higher noise level and more distortion in …
(PDF) A 115dB-DR audio DAC with -61dBFS out-of-band …
https://www.researchgate.net/publication/283830163_A_115dB-DR_audio_DAC_with_-61dBFS_out-of-band_noise
We present an audio DAC architecture with a correction path to cancel the out-of-band noise. This path contains a differentiating DAC with a data swapper for noise and mismatch shaping.
A 115dB-DR Audio DAC with –61dBFS out-of-band noise ...
https://research.utwente.nl/en/publications/a-115db-dr-audio-dac-with-61dbfs-out-of-band-noise
Out-of-band noise (OBN) is troublesome in analog circuits that process the output of a noise-shaping audio DAC. It causes slewing in amplifiers and aliasing in sampling circuits like ADCs and class-D amplifiers. Nonlinearity in these circuits also causes cross-modulation of the OBN into the audio band.
Shhh, keep it down (out-of-band noise, that is ...
https://e2e.ti.com/blogs_/b/behind_the_wheel/posts/shhh-keep-it-down-out-of-band-noise-that-is
This means the DAC out-of-band noise is “folded back” in the audio band, increasing distortion and noise. And, as this out-of-band noise extends to higher frequencies, it can interfere with other devices. Most importantly, in the specific case of automotive audio, this can cause failure of mandatory and stringent automotive EMC tests, such ...
Sound Quality & RF Noise - Out of Band Energy – AudioWise
https://audiowise-canada.myshopify.com/blogs/news/sound-quality-vs-measured-rf-energy-part-2
Sound Quality & RF Noise - Out of Band Energy. Audio analyzers like the Audio Precision APx555 measure the analog output signal of DACs within the 'in-band' range of 20Hz to ~20kHz to ensure they meet design criteria. Signals above this range (~20Khz to several GHz) are 'out-of-band' and not audible and thus not considered of great importance.
Out-of-Band Noise Measurement Issues for Audio …
https://www.ti.com/lit/pdf/slaa313
1 Out-of-Band Noise 1.1 Definition In audio systems, out-of-band noise is the noise contained in frequencies outside of the audio frequency band. The audio frequency band is defined as 20 Hz to 20 kHz. These are the minimum and maximum frequencies, respectively, that the human ear can discern. Frequencies below this range (sub-sonic) and
PCM1754: Unsatbel out of band noise - Audio forum - Audio ...
https://e2e.ti.com/support/audio-group/audio/f/audio-forum/972086/pcm1754-unsatbel-out-of-band-noise
PCM1754: Unsatbel out of band noise. Our customer is trying to replace the DAC to PCM1754. During their ES sample evaluation, they found unstable noise floor level at more than 20KHz non audible band. It seems “Delta Sigma modulator” create noise shaping characteristics, but some reason, high frequency noise floor is changed by I2S clock ON ...
Know Audio: It All Depends On The DAC | Hackaday
https://hackaday.com/2021/10/20/know-audio-it-all-depends-on-the-dac/
In an audio DAC all this out-of-band noise can manifest itself as distortion. The problem faced by audio DAC designers is that the sampling frequency is relatively close to the signal frequency ...
Active-filtering circuit for audio DACs
https://www.ti.com/lit/pdf/sbaa322
audio DAC. 2. Not all audio DACs require a second-order active filter. Some audio DACs feature different noise-shaping architectures that may move the out-of-band noise further away from the audible range, meaning that a simple RC filter may be enough to attenuate the unwanted noise. 3.
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