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Re: Swenson D/A CCS output stage

Hi John,

You are talking about a single 1541A, so with two in parallel the output voltage would be 4vRMS, right?.

So, use a -5V supply, a 150 resistor for R1, trim the current to 30mA with the 50k pot, and the voltage at the input will be 0V. If the -ve supply is regulated, that voltage will stay at 0V. What happens to the 1541A if it sees an actual voltage at the input of the CCS output stage?

Do you know the approx Zout of the cct, I see you have drawn out an optional buffer, which makes me wonder how high it might be.

regards,
shane


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