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Nazar_lv Nazar_lv is offline

diyAudio Member

About Me

  • About Nazar_lv
    Doing audio since 14years, other electronics from 11
    audio, beer ;)
    Real Name
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    "In developing audio devices we can always find creative non standart solutions that will ensure the best sound" (с) S-Audio.Systems


Total Posts
Blog - Creative High end audio
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  • Last Activity: 1st October 2015 10:44 PM
  • Join Date: 3rd October 2009


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Posted 6th September 2015 at 07:59 PM by Nazar_lv Comments 0
Posted in Uncategorized
A couple of variants of this ideal regulator for audio applications.

Ideal because:

1. Stable and small output impedance in the 20-20k area and above (for 2x trans. version ~ 0.05ohm and ~0.005ohm for 3x trans. version).

2. Load current flows locally through the regulator`s output transistor only.

3. Excellent step response.

4. Little capacity electrolytic cap on regulator output or no electrolytic capacitor at all.


5. High PSRR (for 2x trans. version 100db and 120db for 3x trans. version).

6. Noise < 1u (20-20000hz).

7. Simple and reliable.

In addition to the classical 2x transistor "nazar`s regulator" also described 3x transistor version characterized by much better output impedance and PSRR.

Also described a filter/voltage follower that makes better use of supply voltage (Uout...

Posted 9th September 2011 at 10:14 AM by Nazar_lv Comments 1
Posted in Uncategorized
Article from IEEE journal and datasheet about PCM58


Posted 9th September 2011 at 10:10 AM by Nazar_lv Comments 0
Posted in Uncategorized
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

Posted 13th February 2010 at 05:18 PM by Nazar_lv Comments 14
Posted in Uncategorized
From article

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",...
Recent Comments
The link is dead.
Posted 25th May 2014 at 12:59 PM by miklos miklos is offline
Hi Nazar!
Posted 19th April 2014 at 02:09 PM by flyboi flyboi is offline
I think elna...
Posted 13th August 2013 at 06:26 AM by afshindiy afshindiy is offline
PCB Power Amplifier...
Posted 17th November 2012 at 09:53 PM by ricardo rocha ricardo rocha is offline
Hi Nazar,
Posted 25th January 2012 at 04:52 PM by niamex niamex is offline
Hide this!Advertise here!

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