The quasi topology will clip the -ve waveform earlier than it will clip the +ve waveform.
Since you will not knowingly listen to music and audio with deliberately clipped output signals, this earlier clipping is not an issue.
Sort the problems and listen to unclipped music.
You did not answer the questions:
Since you will not knowingly listen to music and audio with deliberately clipped output signals, this earlier clipping is not an issue.
Sort the problems and listen to unclipped music.
You did not answer the questions:
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I don think so... parasitic oscillation it's not in ralation with +10V bootstrap...... with the 39nF on the gate sinewave is perfect.....!
mrlord... it appears you are posting under two separate identities, something expressly forbidden by the forum RULES
Please let us know which name you wish to be know by and the accounts can be merged.
I'm very sorry for my mistake. You can merge on this account.
I don't tink this is a problem of clipping, you can watch the photo. Parasitic Oscillation i'ts another problem, I believe.....
I will soon post other photo with te cap connected.
output offset is measured when the output has no load.
The scope shows a sinewave with oscillation when an 8r0 dummy load is connected.
What is the voltage across the load.
Either Vac, or Vpk, or Vpp?
Not much, in this moment I can't measure.... about some volt, but I remember 170 mA.
@ 13.9Vac output there is no oscillation !
@ 1Vac output there is the interference again !
13.9Vac = full power. That's 24W into 8r0.
@ 1Vac output there is the interference again !
13.9Vac = full power. That's 24W into 8r0.
But @13.9 the absorbtion is 0.8A for the positive rail: (0.8 + 0.8 ) x 130V =208 W. It's correct?
No.
That's not the way ClassAB works.
Measure the Vdrop of the emitter/source resistors and use those measurements to determine the currents. You will need a scope and an isolating transformer to let the scope ground link pull the resistor voltage to the scope voltage.
That's not the way ClassAB works.
Measure the Vdrop of the emitter/source resistors and use those measurements to determine the currents. You will need a scope and an isolating transformer to let the scope ground link pull the resistor voltage to the scope voltage.
sir, can u send me the circuit diagram of NOMS 2709201 ...input rail +-50v...low power mosfet amps..
can any one send me the original source nd circuit diagram of of this amplifier....http://www.diyaudio.com/forums/atta...nt-nmos-class-ab-2709201-small-power.pdf....:)
noms small
Sir Andrew T .Sir NMOS had posted the project ..nmos small ab amplifier useing irfp460..in +-50 v rail..http://www.diyaudio.com/forums/solid-state/43331-power-amp-under-development-376.html#post2727400
Sir Andrew T .Sir NMOS had posted the project ..nmos small ab amplifier useing irfp460..in +-50 v rail..http://www.diyaudio.com/forums/solid-state/43331-power-amp-under-development-376.html#post2727400
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