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parallel resonant crystal
I don't understand what's the difference btw series resonant crystal
and parallel resonant crystal ?
Are they the same in crystal manafacture ?
In what application I need series one and in what application I need parallel one ?
Thanks for your kindly advice.
From traditional recever(2 stage downconverting) to modern receiver
(1 stage downconverting, low IF or Zero IF) structure, what's the progress of
design for this ? I mean why it can not just downconvert the freq from RF to
Zero-IF in the past instead of using 2 mixers...
I'm sorry I lost some information to you.
I got a
(1) 1.8V / 45mA logic signal ("Hi"),
(2) 2.8V constant voltage source
how can I transform 1.8V / 45mA logic signal into 2.6V / 10mA(Max)
by the simplest circuit (supposed digital transistor)?
Could any expert advise which...