MC12061

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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