Hello developers,
if you want to build an amplifier with very high resolution for jazz and classical music then it is now very easy with this module PWM, this also solves the PCB, I can assure you that with a pre-fiberglass board you get a sn / r-100dB.
I have attached a simple amplifier just to see the phase and the connection that is needed (very simple).
This PWM module with another type of power stage (no IR21xx) has a THD of 0.002% at 100W out (4R).🙂
forms are available at a cost of components, but when I do not know how you can buy.
We'll let you know as you may have.
Regards
if you want to build an amplifier with very high resolution for jazz and classical music then it is now very easy with this module PWM, this also solves the PCB, I can assure you that with a pre-fiberglass board you get a sn / r-100dB.
I have attached a simple amplifier just to see the phase and the connection that is needed (very simple).
This PWM module with another type of power stage (no IR21xx) has a THD of 0.002% at 100W out (4R).🙂
forms are available at a cost of components, but when I do not know how you can buy.
We'll let you know as you may have.
Regards
Attachments
Hi,it is clock trw modulator (sheme of Amplifier work but it is for demo (connession and phase of signals) necessary for use this.
in this moment I know that this module can buy on Ebay at short.
Regards
yes,but ops! not see 82R in series at capacitors,sorry.🙂
modulator is very stable also at bridge up to 1Kw (8R).
but point of force is resolution/noise,very good as A-b class.
Regards
Hi All,
I cecked scheme and now it is correct.
A short i put PCB with this identical scheme and measures, just for demostrate that it work perfectly and stable, sure, it possible connect this modulator at professional power stage (not IR21xx) for very professional performances.
but with this simple low cost scheme i listen with very surprise in definition of sound.
With this scheme,modulator is capable di clip at (vcc rail-700mV) ,super nais efficiency!🙂
Regards
I cecked scheme and now it is correct.
A short i put PCB with this identical scheme and measures, just for demostrate that it work perfectly and stable, sure, it possible connect this modulator at professional power stage (not IR21xx) for very professional performances.
but with this simple low cost scheme i listen with very surprise in definition of sound.
With this scheme,modulator is capable di clip at (vcc rail-700mV) ,super nais efficiency!🙂
Regards
Attachments
Hi,
to Kahn.
sorry I said yes, dc sense for autoffset but also audio pass in this FB.
Input FB2 is FET gate,(for this reason not have cx on res).
to 81 bas. PSRR is discrete on this simple amplifier,not for audiophile but work quiet at power. I show this only for connection of PWM,this is very top audio quality,not simple with word explain it. custom chip use for symmetric perfect triangle wave low noise,with 45 ns of conversion time.
on this scheme gain loop close at 27 dB.
Sure,you can develop a better stage with this modulator also.
Regards
N.B. exist other amplifier with this modulator on true hi-fi range top quality with very high performances as A-B class.
to Kahn.
sorry I said yes, dc sense for autoffset but also audio pass in this FB.
Input FB2 is FET gate,(for this reason not have cx on res).
to 81 bas. PSRR is discrete on this simple amplifier,not for audiophile but work quiet at power. I show this only for connection of PWM,this is very top audio quality,not simple with word explain it. custom chip use for symmetric perfect triangle wave low noise,with 45 ns of conversion time.
on this scheme gain loop close at 27 dB.
Sure,you can develop a better stage with this modulator also.
Regards
N.B. exist other amplifier with this modulator on true hi-fi range top quality with very high performances as A-B class.
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Is better (for many reasons) to calculate LC with higher capacity and lower inductance.
I repeat that present a high resolution modulator not perfect amplifier.
amp scheme is a classic simple IR21xx applications but sufficient to listen very difference of sound.
i think with this modulator is easy develop a good amplifier with high resolution on hi-band of sound (tipycal problem of other amplifiers).
Regards
amp scheme is a classic simple IR21xx applications but sufficient to listen very difference of sound.
i think with this modulator is easy develop a good amplifier with high resolution on hi-band of sound (tipycal problem of other amplifiers).
Regards
.wysiwyg { PADDING-BOTTOM: 0px; MARGIN: 5px 10px 10px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; FONT: 10pt verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; BACKGROUND: #f5f5ff; COLOR: #000000; PADDING-TOP: 0px } .wysiwyg A:link { COLOR: #22229c } .wysiwyg_alink { COLOR: #22229c } .wysiwyg A:visited { COLOR: #22229c } .wysiwyg_avisited { COLOR: #22229c } .wysiwyg A:hover { COLOR: #ff4400 } .wysiwyg A:active { COLOR: #ff4400 } .wysiwyg_ahover { COLOR: #ff4400 } P { MARGIN: 0px } .inlineimg { VERTICAL-ALIGN: middle } Hi, having that much high value in capacitance, ever cared to know about what would be the ripple current flowing through it😱
What is so high end in your modulator, that you boast about?😕 You can show us conceptual diagram of modulator also
Kahn
What is so high end in your modulator, that you boast about?😕 You can show us conceptual diagram of modulator also
Kahn
hi,...What is the text before?🙂.wysiwyg { PADDING-BOTTOM: 0px; MARGIN: 5px 10px 10px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; FONT: 10pt verdana, geneva, lucida, 'lucida grande', arial, helvetica, sans-serif; BACKGROUND: #f5f5ff; COLOR: #000000; PADDING-TOP: 0px } .wysiwyg A:link { COLOR: #22229c } .wysiwyg_alink { COLOR: #22229c } .wysiwyg A:visited { COLOR: #22229c } .wysiwyg_avisited { COLOR: #22229c } .wysiwyg A:hover { COLOR: #ff4400 } .wysiwyg A:active { COLOR: #ff4400 } .wysiwyg_ahover { COLOR: #ff4400 } P { MARGIN: 0px } .inlineimg { VERTICAL-ALIGN: middle } Hi, having that much high value in capacitance, ever cared to know about what would be the ripple current flowing through it😱
What is so high end in your modulator, that you boast about?😕 You can show us conceptual diagram of modulator also
Kahn
Sure,tomorrow I show internal diagram of modulator.
concept is simple,problem is triangle wave,this not use opamp for integration.
also comparator is important,ultra fast is good but pwm include full harmonics.
Not simple a high-end modulator.🙂
amp with this modulator have very low IMD and harmonics at output.
Also is not simple high percentage of modulation. this is perfect testable on this simple amplifier (output up to vc rail-700mV) is the best efficiency.
Regards
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Hi, You have very right reason..ahahah!
capacitor value is 680nF not 680uF 🙂 sorry,I digit error.
Hi,
I show also this amplifier (it is on audiopower.it) with very big discount in KIT.
Then is possible solder socket for modulator and use it for test because (from modulator to out) is the scheme post in this thread incluse protections.
Also see a very small heatsink for 300w (this amp have 96% of efficiency) thank the modulator. (at clip loss only 700mV from vcc rail).
Very low price I think is for very big quantity for commercial use, not because poor amp.
Regards
I show also this amplifier (it is on audiopower.it) with very big discount in KIT.
Then is possible solder socket for modulator and use it for test because (from modulator to out) is the scheme post in this thread incluse protections.
Also see a very small heatsink for 300w (this amp have 96% of efficiency) thank the modulator. (at clip loss only 700mV from vcc rail).
Very low price I think is for very big quantity for commercial use, not because poor amp.
Regards
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