[time-nuts] Simple PLL chips, gone ?
jimlux at earthlink.net
Tue May 4 22:20:38 UTC 2010
Nick Foster wrote:
> If you're thinking about using a CPLD to load registers in a PLL chip, why not just implement the PLL on the CPLD? After all, if you're looking for simpler-is-better, there's not much on a dedicated PLL chip that you can't easily replicate in CPLD with some care and attention paid to layout.
Most CPLDs don't have low noise phase frequency detectors, the charge
pump, or the analog parts to make the loop filter.
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