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Old 11th February 2009, 10:34 AM   #1
aobuke is offline aobuke  China
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Default HOW TO increase the class-d's gain?

HOW TO increase the class-d's gain?
i use the multisim make a class-d amplifier,
but the result is worse,when 8KHz(-1v~1v) sin is in,the output
is only -1.6v~1.6v,how to increase it ?
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Old 11th February 2009, 02:23 PM   #2
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Increase R4
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Old 13th February 2009, 07:33 PM   #3
aobuke is offline aobuke  China
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Increase R4

but i think the R4 is the integral resistance,I think it doesn't matter with the CLASS-D'gain.
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Old 13th February 2009, 08:17 PM   #4
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Could be wrong but to me it looks like the feedback resistor.

Since the gain is set by the relationship between the input resistor and the feedback resistor. Either increase the feedback resistor or decrease the input resistor.
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