Huh?
At 11:32 AM 8/12/2005, you wrote:
tastingfan tastingfan wrote:
>Hi,
>
>
>
>I am afraid your suggested circuit cannot work. Anyway, I have tried it
after your suggestion, the output range is 692.6mV-692.9mV, even worse!
And most importantly, we are talking about Open Drain, not Open Source,
that is something of software technology!
>
>
No, not really. Open drain means there is no built-in pull-up resistor on
the drain of the FET. Generally, the source is grounded. Open Source,
in this case, means there is no pull-down resistor on the source. But, in
this case, I think the person who originally mentioned it probably meant
grounded drain or source follower. This is similar to the use of a
BJT as an emitter follower. It has a gain slightly less than unity, but
is very effective in matching a high impedance output to a low impedance
load. This is a non-inverting connection of the transistor.
Jon
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