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The Kuartlotron superbuffer from Keantoken
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<blockquote data-quote="Nikosokey" data-source="post: 1057742954" data-attributes="member: 25955"><p>The top two transistors are a current mirror that feeds the output current into the input transistor. The response of the input transistor to this causes the <strong>cancellation of the distortion of the output transistor.</strong></p><p></p><p>The Kuartlotron is unique in that it doesn't use feedback. It doesn't need feedback,<strong> because it cleans up after itself</strong> - <strong>it subtracts its own distortion.</strong> <strong>Yet it isn't reliant on its own error correction mechanism either - at frequencies faster than the error correction, it simply operates as a passive buffer</strong>. The high degree of efficiency and redundancy in the signal path lends the Kuartlotron virtual immunity to RF interference and an enormous signal bandwidth. Without feedback, it is unfazed by interference because there is little need to load down the internals at high frequencies to prevent oscillation. </p><p></p><p>What's unusual for this type of circuit however is that it doesn't suffer from the usual complaints about non-global feedback circuits - distortion is vanishingly low and there is no danger of thermal runaway or bias drift. It is fully temperature-compensated and the bias is set by the 1k resistor. Noise is relatively insignificant.<span style="color: Gray"></span></p><p><span style="color: Gray"></span></p><p><span style="color: Gray"><span style="font-size: 9px">--- Αυτόματη συγχώνευση μηνύματος ---</span></span></p><p><span style="color: Gray"></span></p><p><span style="color: Gray"></span>Σε πολυ υψηλη ενταση μιλαμε για 300-350W σε 4Ωμο 300W σε συγκεκριμενο σημειο ενος track flac με το buffer επανω η παραμορφωση μειωνεται σε ποσοστο 70% θα ελεγα , τα dynamics παιρνουν λιγο πανω και ελπιζω οτι συμβαδιζουν με τα παραπανω....<span style="color: Gray"></span></p><p><span style="color: Gray"></span></p><p><span style="color: Gray"><span style="font-size: 9px">--- Αυτόματη συγχώνευση μηνύματος ---</span></span></p><p><span style="color: Gray"></span></p><p><span style="color: Gray"></span>Ενας πολυ καλο post για την επιλογη pot που πιστευω αξιζει κανεις να διαβασει ....</p><p><a href="http://www.diyaudio.com/forums/analog-line-level/219342-help-choosing-potentiometer-passive-preamplifier.html#post3157081" target="_blank">http://www.diyaudio.com/forums/analog-line-level/219342-help-choosing-potentiometer-passive-preamplifier.html#post3157081</a></p><p><a href="http://www.dact.com/html/passive_preamp.html" target="_blank">http://www.dact.com/html/passive_preamp.html</a></p><p><a href="http://www.dact.com/DACT_Attenuation_Curve_Calculator.xls" target="_blank">http://www.dact.com/DACT_Attenuation_Curve_Calculator.xls</a></p><p><a href="http://www.dact.com/DACT_Attenuation_Curve_Calculator_manual.PDF" target="_blank">http://www.dact.com/DACT_Attenuation_Curve_Calculator_manual.PDF</a></p><p><a href="http://www.dact.com/Pre-attenuation_calculator.xls" target="_blank">http://www.dact.com/Pre-attenuation_calculator.xls</a><span style="color: Gray"></span></p><p><span style="color: Gray"></span></p><p><span style="color: Gray"><span style="font-size: 9px">--- Αυτόματη συγχώνευση μηνύματος ---</span></span></p><p><span style="color: Gray"></span></p><p><span style="color: Gray"></span><a href="http://www.dact.com/html/leaded_resistors.html" target="_blank">http://www.dact.com/html/leaded_resistors.html</a></p></blockquote><p></p>
[QUOTE="Nikosokey, post: 1057742954, member: 25955"] The top two transistors are a current mirror that feeds the output current into the input transistor. The response of the input transistor to this causes the [B]cancellation of the distortion of the output transistor.[/B] The Kuartlotron is unique in that it doesn't use feedback. It doesn't need feedback,[B] because it cleans up after itself[/B] - [B]it subtracts its own distortion.[/B] [B]Yet it isn't reliant on its own error correction mechanism either - at frequencies faster than the error correction, it simply operates as a passive buffer[/B]. The high degree of efficiency and redundancy in the signal path lends the Kuartlotron virtual immunity to RF interference and an enormous signal bandwidth. Without feedback, it is unfazed by interference because there is little need to load down the internals at high frequencies to prevent oscillation. What's unusual for this type of circuit however is that it doesn't suffer from the usual complaints about non-global feedback circuits - distortion is vanishingly low and there is no danger of thermal runaway or bias drift. It is fully temperature-compensated and the bias is set by the 1k resistor. Noise is relatively insignificant.[COLOR=Gray] [SIZE=1]--- Αυτόματη συγχώνευση μηνύματος ---[/SIZE] [/COLOR]Σε πολυ υψηλη ενταση μιλαμε για 300-350W σε 4Ωμο 300W σε συγκεκριμενο σημειο ενος track flac με το buffer επανω η παραμορφωση μειωνεται σε ποσοστο 70% θα ελεγα , τα dynamics παιρνουν λιγο πανω και ελπιζω οτι συμβαδιζουν με τα παραπανω....[COLOR=Gray] [SIZE=1]--- Αυτόματη συγχώνευση μηνύματος ---[/SIZE] [/COLOR]Ενας πολυ καλο post για την επιλογη pot που πιστευω αξιζει κανεις να διαβασει .... [URL]http://www.diyaudio.com/forums/analog-line-level/219342-help-choosing-potentiometer-passive-preamplifier.html#post3157081[/URL] [URL]http://www.dact.com/html/passive_preamp.html[/URL] [URL]http://www.dact.com/DACT_Attenuation_Curve_Calculator.xls[/URL] [URL]http://www.dact.com/DACT_Attenuation_Curve_Calculator_manual.PDF[/URL] [url]http://www.dact.com/Pre-attenuation_calculator.xls[/url][COLOR="Gray"] [SIZE=1]--- Αυτόματη συγχώνευση μηνύματος ---[/SIZE] [/COLOR][url]http://www.dact.com/html/leaded_resistors.html[/url] [/QUOTE]
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The Kuartlotron superbuffer from Keantoken
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