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5th October 2005, 09:42 PM
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#1 |
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diyAudio Member
Join Date: Mar 2005
Location: quebec
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Denon POA-2400
Does anybody know what this mean. Optical class A and Optically
controlled bias system.I know what bias is but how it can be controlled optically.And if someone have the service manual for this amp, will be appreciate.Thanks, |
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5th October 2005, 11:55 PM
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#2 |
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diyAudio Moderator
Join Date: Jun 2004
Location: Georgetown, On
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Hi ostie01,
They used an optocoupler to increase the bias in a range of signal level. Nothing special really. The transistor in the optocoupler is used as a switch and brings in another resistor in the bias network. The same as if you turned the bias pot up, but very quickly. You know, I never did investigate this but ... I wonder if when it switches, does it put a transient on the output waveform? -Chris |
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