[TCML] DRSSTC weird waveform behavior
steve.ward at gmail.com
Tue Jul 5 17:57:39 MDT 2011
I understand your concern, but i think with using 1% tolerance parts its
just not a big enough issue to worry about. The circuit is designed to have
about 50-70V swing on the R/L network, which gets current limited and
clipped again before getting into the comparator. So at really small inputs
its not the best way to do things, but at the same time i really dont like
having to deal with more supply voltages.
I am looking at revising this little detail though, even though i have no
evidence to suggest that its been a problem for me.
On Mon, Jul 4, 2011 at 11:22 AM, Michael Twieg <mdt24 at case.edu> wrote:
> Out of curiosity Steve, why are you still sticking with single supply op
> amps and comparators? I would be really worried about errors in the DC
> biasing causing weird stuff on the zero crossing detection. Mainly, if
> there's any difference in the DC biases established by R3/R4 and R5/R6, the
> duty cycle of your comparator output wouldn't be 50% and you'd end up
> getting different lead/lag on falling and rising current edges.
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