BSTJ 50: 4. April 1971: Statistical Circuit Design: History and Introduction. (Dickieson, A.C.; Chernak, J.)

2.2 MB·English

THE BELL SYSTEM
TECHNICAL JOURNAL

Yala yale Sonor

Statistical Circuit Desig

History and Introduction

Ry A.C. DICKIESON and J. CHTRWAK
‘haat vesved Janary HEL

The papers thi sees deste tt sli eo og eee
se Ball Telegu Tokatesores ao cpp. sompusore lo all hares of

Sronemisen writ desjgn, ‘The praess ave Has sna ee mee

Ue hee hisiwicll. Given a #20 at nett jet", Mie degree

(i; Sythoeigy «iri, sing lowurm urnacuvoed ehavarterzaions
ofthe devices ant onmnpanent alec

of) Snape eitelt perform, wher Ly metsurements uf bo
ratory samples or by dia ion Smaert nn simmation oF

modeling,

(pte dag perforce aul et

lent ate,

TEnumissy the cesiga for ecmplner nth abjetives urd al

frpeeted conditions of ssmwufuetwring lufraseen and. hs

froarcen: of spe

et HHevatos come or all of choot str wat eatiatolary, if vo
‘puimuty, sign i achieve.

wy changing topology or

‘he fst Laceesealegpelicaion ul» dill ermpues to che ram

on
L100 aaa arene reco FMR, ATRL Hn

7 of linear leer end equalize designs cane in 1980, ‘The eumputer
‘vas he BTT. Mad VT, aneatly version nsng telephone ne eeu
mere gue in spall woralty nd prugramenen developed ew
lrihn, sree weno taken in synthesis nd eptieniaaien

TPerul.cling tis werk we @ eeztizoous efor: to improve the Me
‘queues rege, peed, prio, end arenrany of transmieson Tce
‘ureabee, A uhor allele 4s teulas a 1959 wins Ube seen
ment by Thadéens Slonnrerski nf tve “imiony bal” shag, aie
fckieved easuremens aceuraves nf 11.051 decibel ty ree thot
‘ea le applied over vere ide Irequrney range

In 1066, she impor step nis achiev af asig « Gedieate
enerclpspnes somptter ta eortol the lnesn'sion trang st
fd abe to prcere,ellat, and outpes the date ia vucious comms. The
next sop, of zing zie eamputes leo to play a rly i ube serctiwe
rested i eign and petunia deserted in thi ers,

‘The advantages of mode! and aimletion wre recosnice cas.
Both gigist and aralog computers were put to thia wk. 1a 1062, 0
Iiylrt introonnectiny of the two acueed gret dex ia deine
Wilh Tat Berar one noalinnareyaeme

An onus mist to asl ieleling ia ox adequate ebuoavrinn-
tign uf thw rloneme ta be witdlne, Te eompuesr-operied art nets
Thurs bee uso! slave in nitanenrte characterising trams
fal other devien,cosmte’ with eorts ta olaze the meamterente
the plysine wd gamely uf Le dese

‘Moe: socctly. gore and progreens hae been deseo (ute
the eomputor in “hc process of analysing the performance 0” nerPorks
fader craic eatin af cataynring toleesrs, variation of
the cuvter meri, ao snmustatig lltetnemts, The next ep 8
ta Lave the maehize apply the roars of this analyie in oho tertive
provi ache enueing ens an linia desig

"This bret bier ef i deen fn egnrteaie dese: fv wane
Ivcrion develogment previdea a useful yempectize in owing this
oriee af papers decting ith matistical xuulyes, Tho auto af wing
iis” procedusee was proposed? many youre ogo end sueseesful
toplientions hevs been rportot® tn the pach in the analysis of cove
Sdovsie. The eatatye: wtiea bog led 1a the peesre eietiveney ov
itera of eee and eywens, however, is root a hie twenty
rvcebt slr in devignebarosteracion, deveepmient 0: slcerthis
Tow general-purpose sragram, ead tie aloe to uoprove the fxlory
(aneviasion menmmest and adjusts’ cupabiétis, Consider what
Tus vecuo in the jaa eral jeans of atatietinal analy an de-
serie this erie
etony ap teranarerinn not

Dring 1968 several versione of « youeral- purpose, sli! ans:
{ie program (TAP)=* wave writeon and used elfenively fora YanKe
2 eeu thom passive Filer Hesse ln highly nwalinenrevsteme. Tn
User origisal conception, the iolemavo anulyeis provelures were
‘inane! es final stay in the sign prot, They berg othe
flees of computer wide that ullows che eure ey mip a we
{is oF simlation ina fashion sila to the gner-jurgeseoptiniaw
tion programn, ‘Te conpuler-sises! design pnotues wae vowed econ
sisting o Ue falling thee spe

snalyattCompousnts are medled and (he czouit in onalyzed.

Components end the neliurk logolvgy are ebanged until the
cirouh performanes appnmehes the designer's expectations

(60) Optimization —Tho designer ‘dentifes x esied meemure of
Deriormanee ail The ales s emfyeldd in n general-purpose
‘optimization program, Thos airaion ar uae r¥Foue
strategies to aller the circuit purunocer to bring the penforraee
vvthin the desired hour,

(ui Tolrance Analyta—Using a similar mousure of performanee,
‘he optimized rodel paramscere are varied within chair ante
pated distibutiane with the appropriate eoeelitin between
Daranter. The ciouir performance is repatitivels enalyred
‘with these diferent garam unl « Hisgram of ie see
formance mensure can be interperted with enafidene,

Our experince Ne pk sevunal yon hs shone that tbe wie af

station saasie fx the emptiness
‘Our preseab view is thts this teenique forme new bice anne de
sign, rvtectar, ace! eM athe prune brs eur

formation in bot firertins sith suntan fret on Mth ele
an mesfesring tetiologie

‘Consier whit occurs whim Ue cigar Ukos the Rist les eso the
use of tolerance analysis. he is using she eae pesforamnes monsure
fs-vas iar in the epimisation yrovedare, be ean bull histograms ae
he accumulata the statistics of ny doses, Hor this to be sented 0
the mannfaotuing yield, however, he must iavlude anticipated bench
‘adjustments op aolectet compocate These adjustmenss may he #8
Simple as tuning indvetors to resovanve or as involved se eneuiaing
resistors [a ane-directonal adjustment) while monitoring a eompli=
‘ated peeformanee measure of some subeyste,

"When e consider te mmmutacurubility ofthe cit the fuctory
cavironment, he foros the inne of relating flor teeing proved to
hin penformenes masures uscd for design, ‘hose re often only
1102 su uu ever trcmeks, JOURNAL, APR

casually relied to each othar im spite of the iaereasing reiames on
tomputereperated meazurement equprnnt. This fastory tet eqvipe
tent can offen he aapted to do "gu/ta-go" lest ing the come
petfonmanee erleria yd in the tleranee analyst program.

‘Ta simplify the problem, let u presume th cho sane performance
criteria are uel Jor oth desig an manfature, Th brig fr infom
‘nation low in both dizeetions leone eviteal. Ln hie vlerenee ansl-
Sis waa the designer detoeting feiores diseemble iz manutearing
‘rin the Ald environment? Can he deve se of ennditions for face
tory testing (4 particular temperature, bins siyply volage, ee.) that
mill dla re alunespooten forthe Mold? Ta thane an altemeie
Aeehrique for casper lustinnt which Will inezease yield and de
fee fed fesares? Ee, shud at thie adjustment procedure be
Trg bask into his optimition ard tolerance anassia progsucs 10
soe if he ll hae he optim rosin velver foe his componente?

Divina, the answers to thew quilt depend on the specie
sinus or system being designed, Theeo quevions, however, are net
perigee? to the éssign prooras but vilen inredios snoring eon
Hidetalios sehish wold be sonsidered at every stage of he design

"Th fast toe papers i thie cies dee with tho eure pies
in tleranoeannlyin, The Fs paper by J. Loge intraduces the char
avterizetian and riciling, of eemponensa, This ehueueterigtion caps
Titay enh the einer “0 analsze meuoturing yie' fone
tion betieen devi, wljusliente, et.) ae sepentte rom Gel “ailres
letonernsne ees, sing le |‘ esend paper by C. L. Sensle
tuna, E. D. Waleb, sed (h.'P, Davyanani* craces the developaen of a
insur eieait amas expat slione the designer 20 specify
the accory aa felt environs fora cass et active ezeuts, The
tided paper by bv A, Cormak and Me, D. 8. Kiray" dase the we
tenon of thee fecknyues to nlinvar seis

"The inunta paper by. D, Hye wl S. Vang! develope tae rel
tionships beeen. the design prose and she mpaeuremen: and vein,
owess. The next to pipers by HM. sie and 1. J. Kezatin'®
famine te snsetinn of using colernee wale or tina design
‘The fret deals with tecsiques to optin'ze the component rnsiivity
sd the sero Lo opie ost,

“Tae las tle papese hy Le A. O'Neill" P. Balabony ot ol*
and B, G. Dike" prove « vey of those techniques ae applied to the
Gesign oft eompile ne ere, g noniness lyri igre eieu,
and Snally 4 wnveyuide alee anelysis. In auch of these eases the
avery ssw irmnucrion 108

stilt to exten the design's eupabilily pay Wap beaten onet-
fee dreign estrata ras an import feler in Uhe O46 dec

Tale serie of paper documerts thy esabiTshonesbutunalye bridge
Zausren design, memfacturice. and eld exy‘zemne probes The
fietiee are of“ Ieenigaes ylaecs susctancial dsuaunde on te de-
ign experience of He anginee. ‘The designer mst have Sasighl ia
the tacvery cxpabiltiee nul presedanes aot consider thes effete ab at
fanly stage af ces, Tlie wbiicy, iomever, n bing ene reaaecar-

tg and Eckl exesronments rn che sige proce rete in subac
tially more telisble nod ceovomiesT sigan. Majo avant tll He
sed, thas ono eurtt sey Ube progr as see mati ie
pone Luses ei atusdy soleszence

“Gout Perforce To Bic Skea Fie, DHE 4h ema OD

Oe ee ag comoace
Pane Mace bine at Sipe, PA ih

6 sommetnon Gta ae tL. aed Deryacau,G.. “Liaw Csi ad
rai Poe ah stage pg ta.

1 cet LH gy, Mi Bo, ors Gabe wd Si

x mage, Bane Yang 3 kala of Dag Ug Comcuecho.

oma By Nl! Chane So Rr oad in * RAE,

LL OMe Tah Coss amo fe tent anne iin Cont Pesan —
"ib ties forthe Dil Poumon a BE PR,

va ii, Bt, 84 ad Sad Min TA Mout Cu Tana

va. oly En ae Moots Cul eciques oe Stade of
Hsin oor Wereguién Tronemieion Speen WATT hin mr,

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