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Companding
https://dspguide.com/ch22/5.htm#:~:text=Companding%20can%20be%20carried%20out%20in%20three%20ways%3A,look-up%20table%20%2812%20bits%20in%2C%208%20bits%20out%29.
Companding Techniques for High Dynamic Range Audio …
https://www.rle.mit.edu/isg/documents/ma_meng_thesis.pdf
Companding compresses the input signal and expands the output signal to keep the signal level above the noise level during processing. The static effects, improvements in SNR, and dynamic effects, transients caused by input power changes, of these companding techniques are analyzed in …
Low-Voltage CMOS Log-Companding Techniques for …
https://www.researchgate.net/publication/263076352_Low-Voltage_CMOS_Log-Companding_Techniques_for_Audio_Applications_Special_Issue_on_Current_Mode_Circuit_Techniques
Low-Voltage CMOS Log-Companding Techniques for Audio Applications: Special Issue on Current Mode Circuit Techniques February 2004 Analog …
Companding
https://dspguide.com/ch22/5.htm
Companding can be carried out in three ways: (1) run the analog signal through a nonlinear circuit before reaching a linear 8 bit ADC, (2) use an 8 bit ADC that internally has unequally spaced steps, or (3) use a linear 12 bit ADC followed by a digital look-up table (12 bits in, 8 bits out).
Low-Voltage CMOS Log-Companding Techniques for …
https://core.ac.uk/download/pdf/158965406.pdf
Low-Voltage CMOS Log-Companding Techniques for Audio Applications 3 analog processing under demanding specifications of supply scaling due to its inner voltage compression, so allowing true very low-voltage op-eration. Most of the reported works in such a current-mode technique have been only focused on BJT circuits [5, 6, 7, 8, 9, 10, 11, 12].
Low-Voltage CMOS Log-Companding Techniques for Audio ...
https://link.springer.com/article/10.1023%2FB%3AALOG.0000011163.29809.57
This paper presents a collection of novel current-mode circuit techniques for the integration of very low-voltage (down to 1 V) low-power (few hundreds of μA) complete SoCs in CMOS technologies. The new design proposal is based on both, the Log Companding theory and the MOSFET operating in subthreshold. Several basic building blocks for audio amplification, AGC …
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