?a??????a CD7792CB 1.5v ?? / ??????a 1. ?????? cd7 792 cb ??? 1. 5v ?? / ??? ???a ? ? ? ???o ?a? ? ?? ? ???a 1|o?? a??a?t v cc =1.5 t am b = 25 i cc am =1.2m a ?e i cc fm =4.0m a ?e 1|????1?? v cc(opr) = 0.95 ~ 5v am ?2?t??| fm ???t??| ????a1??? am/fm ?e?? ae?? sop16 2. 1|????y???? 2.1 1|??? 2.2 y???? y?? ? o? 1| ? y?? ? o? 1| ? 1 f m r f - o u t ???????3? 9 f m - d e t ???2 2 v cc1 ?? 1 1 0 v cc2 ?? 2 3 f m o s c ?????? 1 1 g n d 2 ??? 2 4 a m o s c ????? 12 fm if- in ???e???? 5 am mix-out ??????3? 1 3 a m r f - i n ??????? 6 a m a g c ???? ??????? 14 fm mix- out ??????3? 7 a m i f - i n ???e???? 1 5 g n d 1 ? 8 a f o u t ????3? 1 6 f m r f - i n ???????? ?t?y?a???1ye?t1??? ?? ?-????t?yeo?aa 14 o? ?? 0510 5807123-5542 ??? 0510 5803016 1 2 3 4 5 6 7 8 am/fm sw fm osc am osc am mix fm mix fm if1 fm rf am rf fm if2 am if af am det i stb fm det am-agc 16 15 14 13 12 11 10 9 ? 1 3 12 8 3
?a??????a CD7792CB 2.3 y????1 (v cc =1.5v t am b =25 ?te?o? ) ?e? ?e? ?o? a m f m ??? ?o? a m f m ??? v 1 1 . 5 v v 9 1 . 5 1 . 5 v v 2 1 . 5 v v 10 1 . 5 1 . 5 v v 3 1 . 5 v v 11 0 0 v v 4 1 . 5 1 . 5 v v 12 0 . 7 v v 5 1 . 5 1 . 5 v v 13 0 . 7 v v 6 0 . 8 v v 14 0 . 8 v v 7 1 . 4 1 . 5 v v 15 0 0 v v 8 0 . 6 0 . 6 v v 16 0 . 7 v 3. ??e? 3.1 ???t2?y 3y?e1?? t am b = 25 2? y ?? 3? ? o? ?? ? ? ? ?? ????1 v cc 5 v 1|o? p d 3 5 0 m w 1??3?a? t am b -25 ~ 75 ???a? t stg - 5 5 ~ 1 5 0 25 ?? ?a???y?? 1 1|o??????? 2.8m w 3.2 ??e? 3y?e1?? t am b = 25 v cc = 1.5v fm v in =60dbuv emf f=83mhz f m =1khz f= 22.5khz am v in =60dbuv emf f=1mhz f m =1khz m od =30% 1? ? ? 2? y ?? 3? ? o? 2a ? ? ?t ?e? ?e ?? ??? ?o? fm v in =0 4 . 0 5 . 2 ?2?? i ccq am v in =0 1 . 2 1 . 8 m a 4 . 1 fm f=1khz 1 . 4 8 ???3??1 r o am f=1khz 8 k 4.1 ?? ????? v in (lim ) -3db ? 1 0 1 6 dbuv emf 4.1 ??? t h d 0 . 2 5 % 4 . 1 e??? s / n 6 2 d b 4 . 1 ????? q s s / n = 3 0 d b 1 2 dbuv emf 4.1 ????? a m r m o d = 3 0 % 3 0 d b 4 . 1 ?????1 v osc f = 6 0 m h z 5 3 9 0 1 3 5 mv rms 4.2 ??????1 v stop v in <-20dbuv emf 0.85 0.95 v 4.1 ?2?3???1 v od 2 8 4 5 6 8 mv rms 4.1 ?? ??1??? a v v in =30dbuv e m f 1 4 2 5 5 0 mv rms 4.1 ?2?3???1 v od 2 5 4 0 6 0 mv rms 4.1 ??? t h d 1 . 5 % 4 . 1 e??? s / n 4 0 d b 4 . 1 ??????1 v stop v in <-20dbuv emf 0.85 0.95 v 4.1 ? 2 3 12 8 3
?a??????a CD7792CB 4. 2a???a?2a??? 4.1 2a???a ? 4.1 4.2 fm ???2a???a ? 4.2 ? 3 3 12 8 3 fm rf in am rf in 1 23 456 78 9 10 11 12 13 14 15 16 fm/am af out vcc=1.5v 0.022uf 22uf 51 47k 1k 3.3k 4.3k 10.7m 100uf 0.022uf 0.022uf 455k 22uf 0.022uf 0.0056uf 0.022uf 0.47uf CD7792CB bpf am fm l1 l2 t1 t2 t3 sw1-1 sw1-2 1 23 45 6 78 9 10 11 12 13 14 15 16 CD7792CB 4v 100uf 0.047uf sw1 200 82pf 2.25 fm osc 5pf 1m 200 vcc 100uf 0.047uf out 2sk192a
?a??????a CD7792CB 4.3 2a??? ??|y?y ?? sumida ???1??? ??y ??|??3? 2a??a l ( u h ) c 0 ( p f ) q 0 1 - 2 2 - 3 1 - 3 4 - 6 ???? (m m ) l 1 fm rf 0258-000-020 1 0 0 m h z 0 . 0 5 3 - 1 0 0 - - 4 3 1 - 0 . 5 u e w l 2 fm osc 0258-000-021 1 0 0 m h z 0 . 0 6 5 - 1 0 0 - - 4 1 2 - 0 . 5 u e w t 1 am osc 4147-1356-038 7 9 6 k h z 2 8 8 - 1 1 5 1 3 7 3 - - 0 . 0 8 u e w t 2 am ift 2150-2162-165 4 5 5 k h z - 1 8 0 1 2 0 - - 1 8 0 1 5 0 . 0 6 u e w t 3 fm det 4152-4095-015 1 0 . 7 m h z - 8 2 1 1 0 - - 1 3 - 0 . 1 2 u e w ? 4 3 12 8 3 1 3 1 34 6 2 1 34 6 2 1 34 6 2 vcc vc l1 l2 4 ?? t1 t2 vcc 5 ?? 6 ?? cf t3
?a??????a CD7792CB 5. ?e???? vno (db) ?3?????1 ? 5 3 12 8 3 -20 0 2 0 4 0 6 0 8 0 100 120 140 -80 -60 -40 -20 0 0 2 4 6 8 vod( 0db ref.=recovered audio) vcc=1.5v 22.5khz dev. f=83mhz,fm=1khz,ta=25 amr vno thd ??? thd (%) ??e?o???1 vin (dbu) ????? amr(db) ?2?3???1 vod(db) fm(f/e+if) vod,amr,vno,thd-vin 01 2345 0 0.4 0.8 1.2 1.6 2.0 vcc=1.5v f=1mhz fm=1khz ta=25 icc vod ????1 vcc(v) ?2?3???1 vod (db) am icc,vod-vcc ??? icc(ma) -120 -80 -40 0 4 0 8 0 120 -8 -6 -4 -2 0 2 vcc=1.5v vin=90dbu 22.5khz dev. fm=1khz ta=25 vod v8(dc) thd 0.2 0.4 0.6 0.8 1.0 ?3???1 v8(dc) (v) 0 2 4 6 8 10 ??? thd (%) ?2?3???1 vod (db) fm (if) vod,v8(dc),thd- f ??a f (khz)
?a??????a CD7792CB 6. |???a?|??? 6.1 ??2?? 6 . 1 . 1 ????? ???12?o12??????a113 16 ?????1????a 260 ? 6.1 6 . 1 . 2 ????? ??o? ?? e?o?? ??? aa??3 ?e? e?o? ???? a2?? ?? ?113 ?? o??e? e?o?1y ??? ???? 14 ???3? 14 ??? 3? ?1??? 300 o ??a?2 ?|? ???1 ??? ? 6.2 ? 6 3 12 8 3 q1 q2 q3 r1 r2 r3 c1 q4 10p 20p vcc ????? 3 14 ?????? ????3? c1 q1 q2 vcc d1 5p ????? vcc 16 1
?a??????a CD7792CB 6.1.3 ?e??t?? ?e???? 6 ??12????o 1 ??2??????3 12????|???3??? 6.3 ? 6.3 6 . 1 . 4 ?2?? ?22????3?? 1?-??t??e?o?o???? 90 ? o?e?o??3? ?3???e?o? 6. 2 ??2?? 6 . 2 . 1 ????? ????? 12 ???? 113 ?? ?1? ???a 7. 3 k ??? 6.4 ?? c1 1| ??a?? ?? ?? ? 6.4 6 . 2 . 2 ????a ??o???e?o?????aa??3?e?e?o? ????a2?????113 6 . 2 . 3 ?e????? ?e???? ? 4 ??12 ??? ?o 2 ??2?? ???11 3 ?? ?1 ????e? o? ????? ?? ?????1?1?|va?1a???a?2???? ? 7 3 12 8 3 q2 q3 q4 15k r2 r1 q1 agc ?? + c1 0.022u c2 ??? 22u 13 5 10k
?a??????a CD7792CB 6. 3 1?122?? 6. 3. 1 am/fm ???e?? am/fm ?e?????a1??? ?a1???a? am ?? ?o?? fm ?? 6. 3. 2 ?3???a am/fm ? 2 e?o??1y 8 ???3? am/f m ??a ?? ?e???a1? ?? ? ?3? ?12?? am/fm ??a??????? ??????a rout(am)=8k rout(fm)=1.4k ? 6.5 7. ae?3?? 8 CD7792CB 560pf c1 cd7766cb fm mpx c2 ? 8 3 12 8 3
|
