Hello,

    I'm looking for informations about using PLLs (Phase Locked Loops) at
low to mid frequencies (from 20Hz to 50kHz).

    I've googled the web, searched National's ANs and just can't find how to
use a 4046 to detect a frequency like Peter L. Peres sugested in a reply to
Dale Botkin about guitar tuners.

    Also, other examples would be very usefull, as how to filter a 30kHz
signal from a complex waveform etc.

    There's some "PLL Cookbook" on the web? Any usefull application notes?

    Thank you,

    Brusque

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Edson Brusque                 C.I.Tronics Lighting Designers Ltda
Research and Development               Blumenau  -  SC  -  Brazil
Say NO to HTML mail                          www.citronics.com.br
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