Class-D Amplifier Thesis

Class-D Self-Oscillating and PWM amplifier with post-LC feedback
THD = -80dB @ 10Watt (20Hz-20kHz)
Power = 140 Watt
Efficiency 95%

The distortion you hear is caused by the microphone from te laptop.

Category:

Science & Technology

Tags:

• Class-D
• Self-Oscillating
• PWM
• amplifier
• post-LC
• feedback
• thesis

[bMacProductionsXL]

Wat studeerde jullie? Iets specifiek voor audio?

[robbybis]

@bMacProductionsXL Wij hebben burgelijk ingenieur optie elektronische circuits en systemen gestudeerd. Niets audio specifiek dus.

[ionutzxpo]

guys you have to much ringing there, is this hafbridge or fullbridge amp? did you use snubbers on power fets? try to reduce the ringing

[madamerotten]

@ionutzxpo I wonder if the oscilloscope probe is compensated properly.

[robbybis]

@madamerotten rining is a second order transient effect. Compensating the probes would only changethe first order effects, so the probes were not the problem.

[robbybis]

@ionutzxpo This is a full bridge amp. The rining was because we had to much stray inductance on the gates of the power mosfets. This could probably have been reduced by using snubbers or by using smd power mosfets. But since it worked like that we didn't realy bother. Maybe for a next revision... :-)

[madamerotten]

Die Kameraführung hat mich übel! Aber der Verstärker ist schön.

[djjoep100]

nice lol

[ViciaAG]

From Russia with love!!!!!!!!!!!!

[IngBrando]

The presentation could have been pretty much neater. Very nice lab! What I wonder is how the output devices survived so much ringing! Thanks for sharing it!