fm/am single chip radio LA1800 ? la 1800 ?? fm/am fm ? ? ?? ? ? ?? am ? ??? ? ??? ? la 1800 ? ? ??? 2.5v ~5v ?? 22 ??? ?? ?? ?? 5.6m a / fm,3.2m a /a m ? ,vccm in=2.5v ?? 22 21 4 5 67 8 9 15 18 11 power fm am changeover post amp mut i ng fm di scri mi nat o r phase osc mi x e r am rf amp f m if am p am de t agc l p f f m if am p vc c gnd 19 20 1 32 17 16 10 14 13 12 sh ifter tiger electronic co.,ltd
la 1 800 ? 1 fm fm osc 12 pw in 2 am ? if 13 mute 3 ? vcc 14 ? out 4 ? lpf 15 fm/am ? chang 5 ? lpf 16 6 ? lpf 17 phase shifter 7 ? lpf 18 gnd 8 ? lpf 19 fm fm in 9 ? lpf 20 ? mix det 10 fm ? fm det 21 agc agc 11 pw out 22 am am in ? ? ta=25 ?? vccmax pin3 6.0 v pdmax 200 mw topr -20 ~ +70 tstg -40 ~ +125 1 ? ta=25 vcc=3v,? ? ? ? fm ? fc=90mhz, fm=400hz ? vo vi=80db , f=30khz -- 90 -- mv ? io -- 5.6 -- ma ? thd vi=80db , f=30khz -- 0.8 -- % s/n vi=80db -- 59 -- db -3db s -3db, f=30khz -- 16 -- db am ? fc=1mhz, fm=400hz ? io -- 3.6 -- ma ? vo vi=70db ,30%mod -- 100 -- mv s/n vi=70db -- 47 -- db ?? fm=400hz ? gv vo=50mv -- 24 -- db ? thd vo=50mv -- 0.3 -- %
la 1 800 2 ?? ta=25 vcc=3v,?? [am] ? icco - 3.6 5.5 ma 2 ?? v2 1.9 2.4 2.9 v 14 ?? v14 0.4 0.9 1.6 v 21 ?? v21 0.6 0.9 1.2 v [fm] ? icco -- 5.6 8.0 ma 2 ?? v2 1.9 2.6 2.9 v 4 ?? v4 1.7 2.3 2.9 v 5 ?? v5 1.7 2.3 2.9 v 6 ?? v6 1.1 1.7 2.3 v 7 ?? v7 1.1 1.7 2.3 v 8 ?? v8 1.1 1.7 2.3 v 9 ?? v9 1.1 2.6 2.9 v 10 ?? v10 1.8 2.5 2.9 v 13 ?? v13 -- 0 0.6 v 14 ?? v14 0.5 1.0 1.7 v 16 ?? v16 1.6 2.3 2.9 v 17 ?? v17 1.6 2.3 2.9 v 19 ?? v19 0.6 0.86 1.4 v 20 ?? v20 0.6 0.86 1.4 v [af] 11 ? i11 0.5 1.0 1.5 ma 12 ?? v12 -- 0 0.5 v ? ? ta=25 ?? vcc 3.0 v ? vcc op 2.5 ~ 5.0 v
la 1 800 dc ? s?? f ac ? am a _ _ a vcc = 3v d 1800 1 2 3 4 5 6 7 8 9 10 11 22 21 20 19 18 17 16 15 14 13 12 0.1uf 0.047uf 0.047uf 0.047uf 0.047uf 0.047uf 0.047uf 0.047uf 0.047uf am vcc = 3v d 1800 1 2 3 4 5 6 7 8 9 10 11 22 21 20 19 18 17 16 15 14 13 12 0.1uf 0.01uf 33pf 0.47uf 0.022uf 1500pf 1000pf 0.1uf 0.1uf 200 47uf 100pf 0.01uf 18pf 220pf 30pf 3.6k l 2200pf 50 fm 75pf am / fm 0.047uf am - in fm - in 75 36 sny 074 2005 b.p.f power out if out power in LA1800 LA1800 s?? f
la 1800 ?? ? 1 s ? ? f am vcc = 3v d 1800 1 2 3 4 5 6 7 8 9 10 11 22 21 20 19 18 17 16 15 14 13 12 0.1uf 0.01uf 33pf 0.47uf 0.022uf 1500pf 1000pf 0.1uf 0.1uf 100pf 0.01uf 18pf 220pf 3.6k fm 75pf ( 2k ) ( 75 ) sny 07k 005 b. p . f earphone ( 200 ) 15k 30k fm osc if vcc feedback lpf f m lpf det power output input power output shifter phase change over gnd fm input agc am input 47uf am v cc = 3v d 1 8 0 0 1 2 3 4 5 6 7 8 9 10 11 22 21 20 19 18 17 16 15 14 13 12 0.1uf 0.01uf 33pf 0.47uf 0.022uf 1500pf 1000pf 0.1uf 0.1uf 100pf 0.01uf 18pf 220pf 3.6k fm 75pf ( 2k ) ( 75 ) sny 07k 005 b. p. f earphone ( 200 ) 15k 30k fm osc if vc c feedback lpf f m det power output input power output shifter phas e change over gnd fm input agc am input 1000pf 10pf l2 5pf 1.5k 15k 330 4700pf 2 sc 930e 1000pf 20k 0.022uf 1s 188 4700pf 2pf l1 t1 t2 t3 47uf la 1800 LA1800 v a r i a b l e c a p a c i t o r 2 l x t - l m i t s u m i l1 hh-40947 mitsumi t1 hw -40217 mitsumi t2 hw -40194 mitsumi t3 hw -50005 mitsumi b. p . f . sny - 074-2005 sumida s?? f
la 1800
la 1800
la 1800
la 1 800
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