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|16th February 2004, 04:44 PM||#1|
diyAudio Moderator Emeritus
Join Date: Apr 2002
Location: The Netherlands
Blog Entries: 18
Current source in DDAC1543 to do I to V conversion?
Forgive me for this question. It does not really belong in the digital forum I suppose and it is one that stems from utter ignorance.
But since it has to do with my DDDAC1543
I dared to ask it here.
A resistor is a current to voltage converter. In tube amps often a current source is used to replace a resistor for it's current to voltage job.
Often a simple little CCS is effective. And for this I use a DN2540. My question is: "Could a single depletion mode mosfet replace the resistors in Doede's DAC?" or is there simply not enough voltage to get it to work ? Or are there still other factors at work that would make this a misarable failure.
If it would work "Which I doubt" for what current would the CCS have to be set?
|16th February 2004, 05:12 PM||#2|
Join Date: Sep 2002
Location: near Milano , Italy
a current source can help I/V conversion but cannot do all the job.
A good circuit for TDA1543 is Rbroer's simple I/V or, even better, his Super-Pair I/V , which have been posted in this section of the forum recently.
I'm going to try it out.
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