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BME303_lecture6_chap3 - BME303 Intro to Computing Chapter 3...

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1 BME303 Intro. to Computing Chapter 3: Digital Logic Structures BME303 Intro. to Computing Problem Data Path Memory Devices, Circuits, … Language Machine (ISA) Architecture Algorithms Storage Elements R-S Latch Gated D latch Register Logic Structures Decoder Mux (multiplexer) Adder ottom Up 2 Micro-architecture Circuits Devices Logic Gates NOT OR AND Other gates Transistors Bo
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2 BME303 Intro. to Computing First transistor and beyond First transistor was invented in 1947 by John Bardeen, Walter Brattain, and William Shockley at Bell Laboratories (the three shared a Nobel prize later) Shockley started a semiconductor company in Palo Alto, and staff of folded company invented the integrated circuit (the "chip") and found Intel Corporation By 1960, most computers used transistors f l i d f it f 3 for logic , and ferrite cores for memory (Shanghai-born American physicists, An Wang and Way-Dong Woo ) Memory chips (digital circuits) replaced cores in the 1970's Workbench of John Bardeen and Walter Brattain at Bell Laboratories BME303 Intro. to Computing Disclaimer Not all electronic computers are made from transistors. Electronic logic can be built from t b – vacuum tubes – magnetic amplifiers, core, bubbles – superconducting cryotrons – superconducting Josephson junctions So, why transistors then … "Had the automobile developed at a pace (equal) to that of the 4 "Had the automobile developed at a pace (equal) to that of the computer during the past twenty years, today a Rolls Royce would cost less than $3.00, get 3 million miles to the gallon, deliver enough power to drive (the ship) the Queen Elizabeth II, and six of them would fit on the head of a pin!"
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