Class D Amplifier Output
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Uploaded by SkankyPistol on Jan 31, 2009
A short video showing the energy consumed during a maximum output drive condition, and also a demonstration of the pulse width modulation technique used in Class D recreating the audio signal. The amplifier is based on the ADAU1592 from Analog Devices.
Uploader Comments (SkankyPistol)
Video Responses
This video is a response to An Overview of Class D Audio Amplifiers
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All Comments (3)
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this is the same oscilloscope is we have in my Uni!!! cool stuff!
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Why the amplitude were disturbed? It should be only the phase.
gigabrid 1 year ago
@gigabrid I think this is more the reactive components of the loud speaker (being inductive) showing the distortion on the amplitude. Also the termination into the oscilloscope is not impedance matched - the loud speaker used is nominally 8 Ohm impedance, the scope I used had either 1MOhm or 50 Ohm termination. You are right though - it should only be a change in pulse density NOT amplitude, but I think this is merely down to real life response of the system.
SkankyPistol 1 year ago