AWALK DOWN THEMEMORYLANEOFELECTRONICS

By StefanJohansson

My family flag, composed of the rainforests of Brazil, the yellow fields ofSweden, and the rising sun of Japan

One of the subjects at Chalmers

History of Electricity

Swedish mathematician andscientist.First alawyer,but soon moved to natural philosophy.Professorof geometry in UppsalaUniversity from1728.In1750moved tophysics.In1756tutorof theCrownPrince,future King GustavIII.First todiscover errors in Newton's theories of refraction.Instrumentalin invention of the achromatic telescope.Klingenstierna published only inSwedenandinSwedish,thus notwell recognized abroad.

SamuelKlingenstierna (1698–1765)

Anothersubject atChalmers

ComputerNetworks

ARPANET

Evolutionof ARPANET

December1969 July 1970 March 1971

April1972 August1972

Evolutionof ARPANET(Cont.)

November1972 March 1973

Evolutionof electronics

GordonMoore,co-founder of Fairchild andIntelsemiconductor companies,published anarticle inElectronicsMagazineinApril,1965:

• Theintegrationof electronic devices isdoubling every 12-24months.

• This leads tosmaller andyet morepowerful andeffective devices.

https://www.intel.com/content/www/us/en/silicon-innovations/moores-law-technology.html

Watchthis videocommemorating50years of Moore’s Law

Moore’s Law inpractice

8MB(2000)82x23x15mm

1GB(2007)34x16x3mm

256GB(2015)37x20x11mm

Pre-electronic calculations

Faber-Castell slide rule model 2/83N,November1972

Laptopcomputerin1994

Compaq Contura Aero 4/25Typical configuration:• Processor 486SX 25 MHz• Windows 3.1, updated to

Windows 95 in 1995• Monochrome VGA screen

with 16 shades of gray• 84 MB, 170 MB or 250 MB

hard disk drive• RS-232, Centronics, and

1 slot of PCMCIA

Mobilecommunications in1982

Displaydrivercircuit foramobiletelephone

NMTmobiletelephone 1982

Oh,andthere was one more thing …

… thebulkofthemobilephonesystem

Weight 8kg,Dimensions37x20x11cm

Thanks toBertilThorngrenandSvenolof Karlssonforresearch

Examples of mobilephones fromthelasttwo decades

Nokia6120(1997)

SonyEricssonW710i(2006)

AppleiPhone(2007)

MotorolaRazr2(2007)

SonyXperia Z2(2014)

But theelectronic evolutioncontinues,inthewordsof MasterGordonMoore:

”Justremember,what hasbeen done,can beoutdone!”

AppleiPhoneXThenewest mobilephone intheworld,atleast until tomorrow

THANKYOUFORYOURATTENTION!