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CRYSTAL MC1206[
@
“
‘Semiconductor products
..
gnc.
~
MOTOROLA
,,
..-
,.
www.DataSheet4U.c...
www.DataSheet4U.com
CRYSTAL MC1206[
@
“
‘Semiconductor products
..
gnc.
~
MOTOROLA
,,
..-
,.
www.DataSheet4U.com
,:”
cRYsTAL SWITCHINGMETHODs FOR
.,, .: MCI 2060/MC12061OSCILLATORS
:
is dso an economical dual diode in the configuration needed for tfis circuit. The MPN3401 is used with the MC 12061 circuit because it offers a large off-to-on impedance ratio for low dc bias currents at frequencies within the range of the ,*!. MC12061. ‘*{,3, $};. ,\,,\?,$, ,,:2:,>, ~~ *1~.’~~ ... . ..! $ ,$, .tbk+ DC BIAS REQUIREMENTS .ij,, l...J\, ~orward bias for ,the. ,desired cryst~=~$~~yti:g diode (Dl ,’ D2; .D3Y D4, or .D5) is applie~,~b~~~~ing the five ‘position switch. The’ bias current is#~~,#~y set. by R17 desired to electronically switch series-resonant crystals ~ ‘ !<<,~r,. ‘\:*\t\.mw , . and R2 (R4, R6, R&,’and R1.Oh$~e
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