qn qct,ve oulprt cuaient - thurdsak's blog · q af. ola o i i qn inp"t. ... oltrul.1r...

lg . 1:

t i l powe,n Arn pt i { ie n,r . t ) a ior i r . ,o

+lTheê qê 4 dist incts bio. ing types [o^l ' | . t I t J l , l Iqn qcT,ve dewt,ce such os q frr ,rbe oh q tnansiston

to ,?peaate, .os ol ,?^p, i t ien which ?ê deyerd

on tHe ,\cat ion t !" , , ' ?ui lscent . p?int the

con duction an3le of th6 device! ' tu^n on t irne.oulprt cuaient

Fig r ! .1

7he lo.at ion of a po intson arr acf ive de vice'3taansfea chatqctee,ist ics

Bias .r.ro llage

ra.1.1 cLAss A A clqss A qynpl i$ ien is bianedr l * r r lo t r I . . . .so t ho t the qct ive de .' ice

"'oo.ducts @reil

lL rhe bios is ;t- so thot fhe inpr,nt sisnal, l l Itlanies thu o"tprt ?^,+^"Tt ! i. ,,ir., LD ), t y",n

a lineqa êq

ioh o{ the de.vicd -3 '"ioiqcteristics,

f !u,, o,rfp,rt F an ompl;fted lineqa êpôdyotion

/

of the' input. A c lq. .?f--

f i f iea conoo o[ an inpul s i . Tlue lowest d istoation

is obtqined-b;t f ts eff icien"f is fhe wo,ast.

.1.2 cLqt the

A, c lqss B arnp l i f ien

"^t off w ith ziz" in,

i g b iqseduL , The

a+exac I

acl ive deEJ-ce condu"ts on on I,1 oFre- ha lf of t6u

13,.2^ . l - r .sine wqve inp,rt r_ on the othea word, it conduc|

{oz only r ed " "i

o sine wave inp uI .rhirs rneans that on,y ir,"-f"l ,i '"ycre is

qrnpl ; I ied. Mosl ly, twocfass B arnpl ; f iJrs aêJ- l

connecled . in

o f , l th-puf f a^ân9r 'e nf to prrorr ide

"ts one- holf cvcle

gtd gnoth" ' qo t t ' " f o-be b"fh o-plif ied .

t6 laQ+l+

I

rA

daeci(Fm

vio. o T

crAS s A0o" =

:60

o

>- -c€ee

'i*n1-*la[ 3 " ]i i I

l l ii ' 3 lS+

st| l

ol i .

cLAss tsOon : tgoo

t19,tJt

vago

Frg t3 . Z-clqes A ve cla ss B

A clq ss B qvnp I t I iez pôrvides rnoze e[fcient ,ho*" ve^ ) mor.e d l'"t oation than thot o{ theclass A.

"lJ

Dmor l

9ooooo

lg. '1 ,3) c 'LAs5 d A cf ass C ovnp l i { ie z

10,3

is b iosedI I I r ?A

undea rhe cutoff aeqion The qct iveJr, r J - |

de.".iceucls on whe n-IIr.e ,n tq i rs la"a

uffic ien o oveucorn inq -the "device:

The du-t.e- c*.dqcts /ess than one-uz.. l fage.hqlF - os,

ia

o1eO

o

Lc

of |he sine wqve inp ut ,I

o+-fi-..+

Dl l

9ooooo

uio =of"o=o

vee

clAsg B

oo.,, = lto

tobeI

+! iIr(

rnaFl l

o cr.Ass Coo, ( t gooD<, 'm

oroool

(+

, ig t? .3

CLASS B vs . c l ,qSS C

C lass B o^d c f ass C qmp I i[ ie>s qrle ynona

effic ienl be.oruse cvl.^ent flol^ls foz ot f y aJrp?"rtovr of the input sig nol , and funth"imofte ,'thu;,l hadiato,f,s q;.le rnuch'"*oll"a than th"f

of t he class A O

Botl:, clqss B or,d clqss c arn pli{ieass gnc,l , speci al ciacuits ar^e ,std

d,sto^tto

qF.ala

oo

I

I

qn inp"t

u f"rn inqte o^ co mpensote foz the J ;, ;:iln .In class B. , it con b" done bv using the, :push - pull con tiqunation , Brt in tfass compl i[ies,.s, the 6nd uction ongle aê luss tln."rso o, the cfqss c omptif iea i;tV, q push -pullaÂangernen t cennol cornpensote to '4to iha .o--plete sinuso i daf oqlpuD.

The only wey Lo eferninateornplif ieas ' ,on ' b" done bq ftesoâr..t L c ciacuit.

'Y

disto^t ion inus inq q, lonk

. - t

clqss c

I t ,1.+ CLAss D oa cLAss 5 The class D arnpli f iea.gp.^"tes on th.e switch Sasis, satut-te

"olnduc-ting ond lvutning off , alteznal.ly The sinusoi-dal

"ignol is pfr."ssed by the plku width

rnodu I ato z ( pw M) r o.d 'fhe L-c low pass filtezis qsed [on re cote.i.i19 the s ine wqve output.

CLASS A ower qmpf i f ieaCfqss A ampli.fiens QLe lineqa but n,ot vezy

ef$icient . ,":^ fh"t êqsolt. ) tfy rnoke poou ,,

powez avnpl if ier,s. As a,nesult ; clqss A qmpli-

fie,rs qte' used pzirnarily qs srnafl signafompf i$ierc oL lo* po*"h ornpl i[iezs- oLb, ffers . .A

capac it ive coupl t.n9. "lqss

Aqmplifiee fs

ôi suiloble [oL b. t^g ,^ttd,

sir,te its effieiency is *ty lo.n .- ( Ha'( s-zs%)

13 ,5

C LA55 A Powe.e Avr.o

ffrrellSe,uoir ( I bw d istoaf ion )I

o rl*?ntarrr.l oirPowea dev rcEs d *.*d*d.l $r,)o

73.2,1

uin

n1t'fo.rtp,rt

di cou f in class A,riril^iirrrrffi"pl rileis{

r-l*?rDr'.rn^toir arr n

€l

nta"l

,d lt I Dc' lvraar" I \ i l RL

1l lt

6{ne't a.t Powea,

r deo I ca;e (.

) . \ l r

R.L qa)ei eqTlng,J

( Ac) O:l er.16.lI

6slI

RL Po,n^r; =

P9*.,=

P.:VJiAI

p,R,L S

Y"o2 wnngE ( t?.r>

I ' Po t ne" ) ( tg.2)

+ pocnex ) ( tg.3)

3 Po cl lex ) (t?,4)

Fort Po*rar; = lW Rrl lg ( 8Sz)

Vcc e gV , Ps: +W

Inn : o,5A conslqntrtr;AJ,rojq=-? :. a \^d'r1rrc o:doot *.il#r

to rt*

o w

asqd$$1tl otqss A uuu D ia rrt coup l i n q lrr,u qttl*;€t y 'o qiE qf $1rJr lCcr* or^r.uaen 4d, aaolnr '.,u, 3",i* n{{oo*tt fua"^,,1usrto.enl*,'t or aoarfi. ,rb f

- - -

inq f e urrd T^qn sfo.r.rne coupl in cfa ss A-<l ar

-l s,

-) at z)

}]e a I [Y {-lU fl:;l't-l-rQ tAnqd/O'JI

614wrl1t*

zc ll ry..ud

I

BeRe+zc

W BMg

Vp(tr , .s)

t13,O)ft..frd*',{fi1#*"?.:#

tsvce

PD'

2 Vcc

Vcc2Zg

( t3 's)

( ra. to)

V

W

ooP

r"ilos?lnnfl uad.rrrdn Caoler rn"rr'rcr 2)- olaner'r r, fi J' uos u*."iu'lrrl 4:a rl

* VCc

Rc tr (vae)

Vcc - VcE(9AT)-f6qR6

/r *r,tn ti"..aoft "{.f u

Vcc - V'cg (gar)Zc+Rs

Rgg

H"rltJ$.fitr C #o fl.rtislrfq,rorf l,6, pzimazy tz.)- r l

. lQ3ilF|1 tl}lt

ltop tnax ) :

,o,rn:gufi.r*rt r"qr .o =

ua:1.^fr*",.JtdI

oo p rnax) 3

Po tnex) 3

[u.. - VcE.rotr]ft-

uop.no*r'

At ta,6)

lvPr ( tg. l )

| 7 '' do^t^, r\1nilrr.:rr?t" l*.#t.itlt oddri goNY 14

f+

Izzo I

n6er i/e

zzo frcNFB

4o rnA

VcC - VcE tSer)zct

+ rooV

ao

Q2

+9.ov

200

RFloo /16

Q2 zsDZqBvceo = 3OOVr" (na*) s o. I APo(ne*)= 6woTc=7Ot

V.easer) = 1vTrtnex) : t lOog

loo -4 - 2ooo.o4

75K

10K

sg

Rrto

Ji

Vcc - VcE tsar )

Rg

-RE

ct"{oop orax)

Oop Crter)

fc e,2.2 Kst

= [ t

" -= Ag

V", rser,][r - &]

= [roo-o][r- =ffi.lVP

1*ddr "4d

po rne*) = vop?"^*t. = _ot'Z^ ' Tf f iI

.,r'l*ilaso *otC"-, 1\1A a.t.dor dcw6:r ?J V.e Zt)

rsn3nisroet,.r.",o)dqcr*4q 4fl6' sJlrr#'t 'vf] ZJ

td T

ocrcr$rdt f l l i lBdo"irr = t+ RF s +50 . . r l \R1

= 1.76 W Rprg

SVcc ? eOO V

4,55 W

t9Ktw

lK Zc

13.6

Vne (oz) avrca2 rt". =;3Xa g

d.*,.lorrrrir{oc zc4drJ"

II

zc3

zc 3

ntn/&n.d ft.6 ) Ico 3

n4a

rn ( l 3,7)

l ! .

+Vcc) ourpur TRANSFoRHERLES9clAss RB

fi"-''i

ortp.'^tCopaciloz

ocL

Fi9 ts. .7o T L or,d oc L c lass AB

Tl'ue daivez ta,ansfo.a vnez ;ope^ote

ser.des noT only b io sing bulol ond @2 $nom' the i:f{E.t of

t: th"ezrnol ;'uvr awa-f!|EilErI he N rc th."drn is

Dr moy be n-eplace by

when th" spl it duol suppf ies cne ,"ud , thecin"rjl can be d;aeolf y coupled o The openali"g.Xuot ion ahe qs fo l t o. in7

T1

A-,d,n?-J

A+ +vutPu I

Tronsforryrea

OTL

pno:uide 9r end o,cycle eoch.

rhe d iode D,ols o P2.e1/enl in q

-

iRa l

d

*Vc

Qt

RE

cR

Q2

RE

: rt

V t \

) .D' t ivoc l

i*J+ I,)

o \,i

Irss

\rD1

- VEE

Tr; us used too f ter nat ive f y ) one -holf

Tl i " O1

*1a

RL

Q2

ol

t 'q

fo ' ne i

I vpcc ov

fRaio

l" i9 l;, ;

| 3,3

aeed clqgs AB f,1;rri.uJas d"rJ/ ljdundr*?A rr'er4oltrul.1r t;j*Cu?v,*r$rtofin nle Hr Fr steeeo

ol*1.

t J a'td," t;; /jnr{aorderdairsr ffietdaredo t

nd o.llrc t13 dernrt i*dir;Iq

t"u/ R:&tsalent)

lrodaaer{fl3,*t# .:}-ple ',en1o^.1 I ?old1t

t]âti* "r nJtrn rl t dlnrC ta.l'! - 1 3 ' 17 J

tg. 4 asqtTd-Ta noerrr?urrrnr? t cor.pfementqa\L-Push - p,.r l l Ii-

1., n,rr"[Cnd r.r?/,t.{ fi; fi/*,1e 'uos n u:tu|fi'nttryao'rderi.,^''ilo t complem"r,t I r\d'r'*q{,t.4 {#t oa,d,jl d+rh " ... dnh, i o oo 'hrnL,nl dr. "t#d"1 4.iu',rr]ô d'",' ,*l/ '

n{r*?l*o{ i1{o: td"q NPN- PNp q{o N chon^r l' ,l fior,oorf tr1.rul,"1gS

'o.rJr.dS ttrdo*d*-

R channel

, if if idOff tttluerr I r t Hst b?rtl0la(

Hto,'lr fierno,l o ;.J

ôltr6urrrnfr f .Jrn plevnrnto ^y

paia; "

d"1*..t1d.^,*,lr$,"r'lf ''...il r*"i i rf .,^ ^ ̂ "'t,-d -

*.^nfi d* ,r,.r{* ,;," M r a o 2 ordartf l"l, riu Mu5o2*"J* asK 4os o:. i""1d.i du asri i5 *.r i*

I

1*ocnd clqss P As*da1A'-td.r^",,rr*3/t."d .r.,"d 6aod*

.n4o d ao*'i **tii da.ri a.*rdr,rffid *-",o\." f;.^ t dndoa ]l . r

1tat -,dfi n{r*?/,t.{ *.t/".1o!,*itr d*irorxdo aa 1so o *laE

,.t,rfior ri.r^1fi':16 a;ti^ftd rfir, A.o1r, d:r*iri.T t ;

qalr X**".,r?r\û du?ntt ot', i1?.,ni. no'rat fi s* do,n"llJ19

I Caoss ove^ Disto^t ion ]_,_\- iJ,r

,dr*o, ,,""rda Ao'rrr lTr t lacn glrl.lil nr..îl,'"l t */1"

t3. to

ar",{lrd,i^1 rtfio1. d",^.J rdrd"o nrri""l d; nrs &Jt ld n l r l o. r ^1 ,r^ l i F]-- t l . et) ( ' - iT 'nr..r ) 5'tAalt(n{'\ t idFtOi Osrsr6Oc\&rta,\ BgUja.,,....-..'F.-/-

"l"jXrEr,* t'i"t dr"p nti.nJn'nt"n1*l."og dsna^o{ rls.rnat ntsud 6oeJ t f d le cuaaent ,nda q u iesounfcuarent J : rcq

nf3,.rJ.da"f, azi ",. fr $ r o . 5 - 10,/. !a o n,t:,Url

d.,,{" nrrn'...r.01*dnrrr* oic "d-dqd,Dn t1*,#;

,lJJ".dlrd; *r, ;uo; rot " [.ross ;t';"'J";^qt..tta., rlign ,f,* aatdt lil*n.ln nrdo fin1r oanrfiontfi nre ris"rn l*dnuqgroe r,"# i

r,-ra{ r'r6artd rron+r,i *d- ilA d r *,r,r o dc\ oo or oid

odr*alA,4 \- , r I | |t{, ut,u f 1# dn rfiuJte rrl*d.r r#r, Vo,,. il:.rr,-r

, tpJ raa^, fJ ^yn€'

:es; J , ' ,O^,[Gr'rr-rc'L)

l{r'tJ,fi;,s t?e, " t v ) ,Jr^.qai#nr,{flaa.iC6.,ar3\,{Ji l . 'o ,Trdur, i i ' ata : c,r i "" t . r, in^; i ' , : j r l f l 13.p

I toPqci tca Less' dc ' (*

. IPN

Q3Vea: Vgs

V

€

hT^,.F4

PN

tQ

t1 r13.9rJI

VRr

in

Ela

I

{1- l

ID

a Qz+p N

RF

R1

eIOTL

-VeE ocL

* Vcs - Vcc

Q pn,p

Rtc

*Vcc l3"t l

, l2v

_tBE

D1

t l lRe

t ' r_ VeE

Vo ( pc): O

Vs = l2vr"l= bvre I

I

J

,' aneru

Vpx t l3. t l )

w Bi45 ( 13' t2.)

v

rv pN 1vs

l.VotDc) , -Yrc/z

Vs =l-Vcc IdJf i ' ro.9I

vo

V9

OV

rpc) a vecfz

3 Vcc

r'[*ii" r,rdr"lo "{1;

Po r ne*)do pr ( nAr)

2 Ra

1"1a. Dl , Dz ca,ar vaz oard*.icArog6,tsdr"{1",J'l lddu n{rrailt* 4a **,*d*n t,ii 1.d*o-,*ul*r-^J nB +1o A n.rrI

Ji*",.r Vn, o:d.^n'lo*orrde*ntt&J vse *1 @rp* raere*rpnrlr xrd sr rr'.rvrlq "1, nt ,./ntu,&*1J md e : rcc. nld-'1'rficrasnrt

t;,i" E NpN rar e pHr opo,r(lt d/o[dn'is]la oJr. ^^"J

nB

"to A f,r'l, n't ru{sdla-{"d"fi.,r1e6ar\ [16:. "r'>dstJrft

AtAa n: d.,^ uisdt,r,rr fi r gt- ..tl ung I g . iz lrdo*d,^ u-I I - r r - .

;" i"'t,*r4e fle, f,'t'o"t ?/ t '.tol 6,n, "1dTtJ.,ft

darn{ #uri'.d A 3 arqn oi." d* . G,,rr$

^^-.,1 fi'",Jt

"d/t

to r* tr.rex) = [+-v.ar] f f t l

13. r2

cr3.r3n)

( t3.14n)

nrn+: ae,J r.. ^3

..Jd q.rrJurr.rs,.0a$ n")dJ,lJ .d\ fi ,"oaarl' lrnr+ l g . 14 n 6mfiert ol"r e,lntd rdrr

f "" cpo) s11

q.S. ofi"dl 1* 'oJ e Bd"'d.Aq flr dnrr*il *"d d./t

l -t Caa! l :PI

Po Vs2+ Vs. Io i

- -2t-/+fl2 (R,- + Ba)

rq I rr1$Gsntl'rv{ 6or,

"'r, *Jf, ut;/ira*rdool*orufu oloold dueco d . r.,f . " (mRx) = Vg Ie

zn(Rr+R, )

+ Iq

P6 3 W Rms

ni"ftn',,t*1r1.fr n,{r.*?l rela{ ri* ndrt*il rela4esr*to& , t rsAr:o , r^:nhf innrrr i r r i luf il ludn' f iudrd. : , n{o RE:c r Ia :C

Po cmex) s So Rr-

PO.,t^- , , = Utt : &Po(Prnrr) g O.2A>t

--T-cc cmer)

oJ'lui % :

"fluiJrr?nl n1r{

svsefl RL

2'r". an^*.1 Vs 3 ,tl=

&fl RL

rirr ) /, E€t : +* x

: I - i x loo : ' i r . rn

' /oI

( lg.rsn)

1r*t</

g,tao $ FE

( t? . 16 n)

Po nax( l?.r Ih)

2P6R1

olo E$

100

( ,3. f 3)

rra3 ;d {lJ "t",A.td or * ",lroatlr l

3163 13 ,12

{trcQ,

^fitulaVsZ

2 Ru

-

J--r

2 Pocrrar)

S 50 ' /o

ct3.1g)

( t9.13t l )

l l a,h1 PtO

")

( t3,14!)

raJ: 3 x '4R! x roo

8fi. . - vs3

't.*d,j"!J orqino,r$r''rd" nro.{nlr.,d/ t{*",o-l ,q B a.u$?13

Jc:?n?ri1r.rd"#r ioorio,o *td !.n'ro. rdc,mr d"rrdr,d"*,

",or $43l.tlot*. t,t.uu-6ad sa .J'rn, .

.riudcfigrorjt:n.d

s8eotas aa"d A Ca fiaal* i.fr*,rr-o.t o".,

n {'1"{ J ofln?,n..,'t d c do .i*o/'

E((

.*r.Jt!,lf,cnril osqd rsJrs d ri.,. ^otJ

nB 1*dnni*q€^lll Aa'1il arol t.r^rgJ{ o)A ri",1d;tf d *,o. o oS t" l tda"n'rtft i a'ra: lJrr osQ.J

",ot {u. A33

n),td.*td", b[u!au lfl * dc no', 1rr1f, r drt 1 f.r.t?lt gJ).uJ

trdc d*LJ

tl'Ci ".t1

oOet .qr1 l.|'r AA-t }./ ati u', .{*, .,. d n'6-fl da ri", ilr n

il""i" qrrn,r ' fier'lJa*.du baalr'l,arJl..lo*rrasond, { . rer"rEr- . ) : : : i : * ' _ *r d tt',tt d.. L z, + o I

-orfrrolti S rla-rrft-rif" *dor.r q,-=lai't"t

I

OeJ"199.r'\ n

^lOl

u*"td.l/o,los Adod*

ng do nci ,i"l'dl alunl? r? . rl

n{r "JX"dlrtJorr cr" q,

. C_ I d_.-J <r) . I t I , {n.lasdq A6un nf"l$dC tst@l dod 6\ AA Ail$

' - t ?

Po tna* )r , 2

ivs:4Rl

ia, t t

^r J ! ' c l . t . t a lnC3t!6n [tT\a3nlat]fa C o^tt^Qislaonrfl 5r cru asq't n3x

g160 ^

rn^ ^t

ro.2 Rr-

gtr nat O . 1 '1.t_

2 Po tne* )RL

r g. s ) t ^,d -a.d"fid

srod $',rr rl{Asoi*

tt"3

t Dar l ington Conf ig rr to i io n J

nar.r?d i.r4 d -""*f,lfi

d, dadu ti. E Acluqto al1*asc{ref lr,nor'ds evrrtdu.ra.-o{ a"qrd,

1da*ord' trdo asnt.tr{ an !d.-a{ n,r.*?d,ral so.h..,d 6rR#ol n.onr3."lds

",r!rt ,o A ndr*?droto{ri"rdsc Power Taansi sto^t: a:t ri"d-drnr,r rJ E,'lr,l r.r,t:*d i.L Fo J qri 6n so ti,

",or.r/ rrrJ dng ri, ",cS r,-r* s ;t1#acqd i dt, n,lrrrSd.o^d t:rdu ,o^.d

"*"A.,r.irpJdsd*agrd*,^r^*t1d sfio

^olt{A* fi nrr*il bsro l tlodJ sre!,

rlt:f,rfin1$f rroc C3uu 6g-r6e 1ro nrdri"r nd"..?.J rr"{ 2 - zdaa.r.rs4a d*ag,.c r'r{ 6cdre ndrrr?Rro.o{#c ,,A*, #r.n: rdd€rrud*.,Jr..ilb'ad;.1*a, rfisJc J do Ci A''.rnf i"\,J1g.r1r.rfr":rrd dr#* xl.n da d.,r ,Je;erro[ ar6Q$A$aodrdrnranol l ntrur/ t Fo J t6ondl*A;.r^{1*

I

f\/^IJI

| ) ^ , ^ f l ,

. ? f , r r j

fi1,J G,4a o.-ri 6.rdrr l. *,.<o,^3 ,,'=.lldt ol# t r"r"?d*d

7 3. '14

rez i Pt(P, ' t ) f r t

rsr + Frrez

= fro, : Frn PtP' . + P. r i r j r : f .

= (Fz+r) faz B (Fat r) Icr : (Fr+r) FrtBt

a ?zl t+Fr ct PrF" (13.te)

dflo6erad* .,ilocn".o Ji,rd* gld dc1*,rtj; | 3 . 1oI

nrn,l rJI

at ,

{c

ua3

a{lldI

nrnddI

l t . 10 n $e3 i l

rc rror) 3 r" , +

Tez = rer :

rB.ror) : rgt

Ic cror): IB, t" i l

,9 '10 a $43 I

rcrror) = lezrc cror,

- s Fto,Ia rror)

t f rcrrot)

-

Q,e

l t ,

n)

Q2

VgE 'Vger + vgse

t ) PNP- PNp B

l Ic . ror)Qi

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3$W-Desilnedfor usr', 'rith rctive {ltarcross- high-fraquency channal. C, and C. are 10 pF.overnetw'orksforrh':e loudspcrkars.Forio.w- Article inctudes circuit for actito filtct nat.cst.lrdq.rency oiai, lel, Cr is 150 pF rnd C, lt 50 work.-D. C. Read, Astivc Filtar Crossovrr Ncf-'pF. For rnlddte cl'iannal, Cr rnd C. rT 25 pF; For workr, Wircta* Wotld, Dci. 1973. p 57F576.

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60 W WTIH,AGCOUPIED OUTpUT-Usos Mo.torola co?nplornentary Dadington output tran.rlrtors, with MJE604{ for 05 ani rviJE604t rorO5. For 8.ohrn louds'paako'. Ql ls MPS.A06, 02tr MpS.A55, Gl la MPir-ai3, and 04ls MpS_A06.Suppty l r 72 V. R5ls 220 ohms, and R7 lr 6BK.Same circult ls userJ with different cornponan3rfor other ouput po,,u6rE down to 15 W and for4.ohm loudspeakor. Frequency resporiso la 20H: to 50 kHz for -1 98 points._R. G. Ruehr,"15 ro 60 Watt AudloAmpliflera Ualng Compto- Intontary Darllngton Output Trensisto6,,, Mo-toroJa, Phoonlx, AZ.,1974, AN-4g3g, p 3.

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60 W WITH DC-COUPL€o OUTPU,T-06 is Mo-torola MJE60+1 complcrnentary l)srtingtonoutput transistor, and O7 is M.JEG01.1. .J1 ar,.;O2 ara MD8002 dualtransistor, O3 is MpS-A56,04 is MPS-AI3, and Q5 is MPS-A06. For 8-ohmloudspaaher, supply is i36 Y,with 6.2K for R4,€0 ohms for il$,'and 33K for R7. Outpui lsntgrvoltaga must bo mairitained at 0 VD.: to €nsuremaxinium signal swing and pr€vsnt DC voltagefrom acting on lcuCspbak;"r: FreQueney rFsponse ls'10 Hr to 50 kH:: i 'or -1 etB points. Sarnecircuh is usad ur;iir diffffant componontc torother pcvrors down tn 15lr1l dnd for 4-ohm loud-speaker.-R. G. Ruotis, ' 'ri to 60 Watt AurtioAmplifiers Using Complamo.rtary DarlingtonOutput Transistors," Motorola, Phocnlx,. AZ,1974.,XN-4838, p 5.

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