qingyu guo

68S08QG4 Internal DCO jitter

Discussion created by qingyu guo on Mar 20, 2008
Latest reply on Mar 20, 2008 by Jim Donelson
hi,all,
 
i'm  using the QG4  to generate a pwm  and filter the output with an active filter,
i hope get a stable voltage from that, but i got a unexpected signal which has a
perio about 2ms, it is unacceptable in my system. the PLL's reference frequency
is from the 32.768Hz crystal, i tested the jitter of the pwm output ,it is very huge,
could someone tell me how to reduce the jitter of the QG4's internal oscillator?
 
thank you!

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