Matching to Crystal Filter
David wrote:
Andy,
Thanks. I am using single-ended output from the SA602 as well as for the
SA605 input. I decouple the unused output/input with 100n Cap in each
case.
How do you know the match is working correctly ? My concern is that when
I build the circuit and sweep it with a sig gen and tune it for peak,
how do I know the match to is correct in the first place.
Regards
David
For RF matching and filter responses, I like to use RFSIMM99 which is an
impedance analysis program using Sparameters.
The Sparameters are generally for active devices, but it also does a nice
job with resistors, inductors, and capacitors. One trick it has is a
tolerance analysis routine using monte carlo to choose randomg component
tolerances. Very useful when testing to see if a particular circuit is
likely to be tempermental, or if it will tolerate component variation.....
Just do a websearch for RFSIMM99 and you will find the program, it is
freeware.
Jim Pennell
N6BIU
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21:45 Pacific Time Zone
Jun 6 2006
International Time
04:45 UTC
07.06.2006
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