Home |
Search |
Today's Posts |
#1
Posted to rec.audio.tech
|
|||
|
|||
Class D Output Filtering
An open-circuit, class D amplifier output has extremely sharp
edges due to the switching of the bridge. The expectation is that, somehow, the output is averaged over at least one cycle of the switching period to form a continuous, analog voltage. If this output is connected to a speaker with a mechanical lowpass characteristic, then the speaker's mass will effectively average the "digital" output into a continous position. Thus my question is, when connecting a class D output to a speaker, why do we need filtering at all? That is, why wouldn't the mechanical lowpass filtering of the speaker be sufficient? -- Randy Yates % "My Shangri-la has gone away, fading like Digital Signal Labs % the Beatles on 'Hey Jude'" % http://www.digitalsignallabs.com % 'Shangri-La', *A New World Record*, ELO |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Class D power amplifier---what about class-D CD? | Pro Audio | |||
proper line filtering for switchmode PSU+class-d amps? | Pro Audio | |||
Any blind listening tests on Class A vs Class B amps? | Tech | |||
Class D full range/Class T w/Tripath | Car Audio | |||
Neve Class A (1272) Output Question | Pro Audio |