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CRYSTAL MC1206[
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cRYsTAL SWITCHINGMETHODs FOR
.,, .: MCI 2060/MC12061OSCILLATORS
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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 , .
MC12060 Datasheet
