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Old 21st May 2010, 07:58 AM   #1
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Default CCS and regulated B+

Dear All,

Basic question: If I have a driver stage with led bias and CCS, does it make any sense to have a regulated B+ ?

It should not really matter for the tubes, as no matter what the plate voltage and current will be always the same, is it correct ?

Thanks,

D.
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Old 21st May 2010, 09:02 AM   #2
Arnulf is offline Arnulf  Europe
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You are correct, as long as CCS dioesn't hit its supply "ceiling" in operation.
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Old 21st May 2010, 12:08 PM   #3
SY is offline SY  United States
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Non-critical, no. Much less critical, yes. This topology will have a power supply rejection of approximately the ratio of the CCS source impedance to the plate resistance. A quick calculation will show you how quiet/stable the supply needs to be.
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