[time-nuts] ? phase comparison or other device
jmiles at pop.net
Sat Jun 30 19:42:51 EDT 2007
> The output of an opamp is always referenced to its power supply,
> regardless of the configuration. If the power supply is noisy,
> the output is noisy.
Beyond a few kHz this may be true, but at lower frequencies even a low-grade
opamp has excellent rejection of power supply noise. A good opamp data
sheet will characterize the PSRR versus frequency.
-- john, KE5FX
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