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First article about DEM (TDA1540, TDA1541)

Posted 9th September 2011 at 10:21 AM by Nazar_lv (Creative High end audio)
Updated 1st April 2014 at 09:49 PM by Nazar_lv

“Dynamic Element Matching for High-Accuracy Monolithic D/A Converters” RUDY J. VAN DE PLASSCHE. IEEE JOURNAL OF SOLID-STATE CIRCUITS, VOL. SC-11, NO. 6, DECEMBER 1976
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PCM58, the best 18bit parallel DAC

Posted 9th September 2011 at 10:14 AM by Nazar_lv (Creative High end audio)
Updated 1st April 2014 at 09:48 PM by Nazar_lv

Article from IEEE journal and datasheet about PCM58

AN 18-BIT DAC FOR CONSUMER APPLICATIONS” By F.J. Highton and K. Ito, 1988
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MASH

Posted 9th September 2011 at 10:10 AM by Nazar_lv (Creative High end audio)
Updated 1st April 2014 at 09:48 PM by Nazar_lv

Articles and patents about SONY (NTT develop.) MASH DACs.

“A 17-bit Oversampling D-to-A Conversion Technology Using Multistage Noise Shaping” YASUYUKI MATSUYA, KUNIHARU UCHIMURA, ATSUSHI IWATA AND TAKAO KANEKO. IEEE JOURNAL OF SOLID-STATE CIRCUITS, VOL. 24, NO. 4, AUGUST 1989

US Patent 5,021,788
US Patent 5,073,778
US Patent 5,148,168
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PSU for High end audio without electrolytic capacitors

Posted 13th February 2010 at 05:18 PM by Nazar_lv (Creative High end audio)
Updated 1st April 2014 at 09:45 PM by Nazar_lv

From article http://s-audio.systems/diy/psu-without-electrolytic-eng
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Electrolytic capacitors are constant part of power supply of audio devices, but in terms of sound he does not bring anything good, dispersion of sound quality-type of electrolytic capacitor is very large. Sonically the best types of electrolytic caps are Nichicon KZ, FG, Panasonic Pureism, Black Gate FK, NX, Elna Cerafine, Silmic II, Silmic,but the attempt to eliminate from PSU electrolytic capacitors was very successful, instead is used "electronic capacitor" (right side of the circuit).
It is global negative feedback free electronic substitutes, that has a low and stable impedance 0,1...0,2Ohm (equivalent to cap 40000u) in the band to megahertz shunting NP0 0,1 microfarads Murata GRM31 in close to chips, it completely detach regulator (317\337) from load, therefore we have the ideal transient response when load "changes",...
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