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recently, i am doing something about ti s/h
i found that parasitic ind became a big problem
pkg, pcb, even smd res & cap
all of them cause ind
so different s/h 's kickback became important
most paper solve this problem by add buffer before ti s/h
to isolate kickback from input
but i think add...
thx for ur reply
u r right
when i ground the body of xtal
the freq back to 32.768K
but what can i do when i used a smd xtal
why the crysital working in 6th harmonics?
is it because of the overdrive cause unstabilization @ 6th harmonics
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thx for ur reply
i use a normal...
I designed a 32.768K xtal oscillator
i didn't add RD because RD seems it is unnecessary
but there was one sample, in more than 50 samples, working in 194K frequency
but when i put probe to its XIN/XOUT pin, working frequency changed from 194K to 32.768K (we can actual see the transformer)
and...
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