Rich Grise wrote:

On Fri, 03 Aug 2007 22:20:53 +0000, Joerg wrote:

See the scope plot and excerpt from the ON Semi datasheet for the
CD4060. The blue trace is at the node RS/Rtc/Ctc, the yellow trace is at
pin 9 which is an output.

Why is there sag at the end of each phase? Rs is 500K and Rtc is 100K. I
mean, that shouldn't be any load to write home about even for a CD
series part.


Stupid question, but are your probes compensated? ;-)


Yes, and the power cord is plugged in :-)


It kind of looks like you don't have enough feedback - i.e. your resistors
are too high in resistance, or maybe your cap is too small.


These chips are often used with smaller resistors and caps up to 20uF.


Your plot is incomprehemsible, but I'd expect "OUT 1" to look like
your blue trace there.


Hey, this is a brand new scope ....

--
Regards, Joerg

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