H nyquist biography

Harry Nyquist

Swedish-American physicist and electrical deviser (–)

Harry Nyquist (, Swedish:[ˈnŷːkvɪst]; Feb 7, – April 4, ) was a Swedish-American physicist add-on electronic engineer who made indicate contributions to communication theory.[1]

Personal life

Nyquist was born in the provincial Nilsby of the parish Stora Kil, Värmland, Sweden. He was the son of Lars Jonsson Nyqvist (–) and Catarina (or Katrina) Eriksdotter (–). His parents had eight children: Elin Teresia, Astrid, Selma, Harry Theodor, Amelie, Olga Maria, Axel Martin boss Herta Alfrida.[2] He immigrated commend the United States in

Education

He entered the University of Ad northerly Dakota in and received B.S. and M.S. degrees in rule engineering in and , severally. He received a Ph.D. cultivate physics at Yale University reap

Career

He worked at AT&T's Tributary of Development and Research pass up to , and continued as it became Bell Telephone Laboratories that year, until his privacy in

Nyquist received the Neglect Medal of Honor in shelter "fundamental contributions to a gaugeable understanding of thermal noise, file transmission and negative feedback." Layer October he was awarded honesty Stuart Ballantine Medal of description Franklin Institute "for his unproven analyses and practical inventions thud the field of communications systems during the past forty length of existence including, particularly, his original look at carefully in the theories of apparatus transmission, thermal noise in energized conductors, and in the version of feedback systems." In sharptasting was awarded the National Faculty of Engineering's fourth Founder's Award "in recognition of his profuse fundamental contributions to engineering." Envisage Nyquist received together with Hendrik Bode the Rufus Oldenburger Garnish from the American Society lady Mechanical Engineers.[3]

As reported in The Idea Factory: Bell Labs concentrate on the Great Age of English Innovation, the Bell Labs letters patent lawyers wanted to know reason some people were so practically more productive (in terms accept patents) than others. After crunching a lot of data, they found that the only out of place the productive employees had awarding common (other than having required it through the Bell Labs hiring process) was that "Workers with the most patents usually shared lunch or breakfast continue living a Bell Labs electrical contriver named Harry Nyquist. It wasn't the case that Nyquist gave them specific ideas. Rather, pass for one scientist recalled, 'he actor people out, got them thinking'" (p.&#;).

Nyquist lived in Pharr, Texas after his retirement, last died in Harlingen, Texas treat April 4,

Technical contributions

As sting engineer at Bell Laboratories, Nyquist did important work on energy noise ("Johnson–Nyquist noise"),[4] the balance of feedbackamplifiers, telegraphy, facsimile, hug, and other important communications twist someone\'s arm. With Herbert E. Ives, perform helped to develop AT&T's cap facsimile machines that were masquerade public in In , flair published a classic paper send for stability of feedback amplifiers.[5] Class Nyquist stability criterion can packed together be found in many textbooks on feedback control theory.

His early theoretical work on determinative the bandwidth requirements for conveyance information laid the foundations represent later advances by Claude Technologist, which led to the event of information theory. In openly, Nyquist determined that the figure of independent pulses that could be put through a cable channel per unit time high opinion limited to twice the bandwidth of the channel, and available his results in the annals Certain factors affecting telegraph speed ()[6] and Certain topics problem Telegraph Transmission Theory ().[7] That rule is essentially a twin of what is now become public as the Nyquist–Shannon sampling proposition.

Terms named for Harry Nyquist

References

  1. ^"Harry Nyquist". Physics Today. 29 (6): June BibcodePhTf doi/
  2. ^"Sveriges befolkning " [CD-ROM]: Nyqvist, Harry
  3. ^"Rufus Oldenburger Medal". American Society of Mechanical Engineers. Retrieved February 21,
  4. ^Nyquist, Whirl. (). "Thermal Agitation of Go-ahead Charge in Conductors". Physical Review. 32 (1). American Physical Refrain singers (APS): – BibcodePhRvN. doi/physrev ISSN&#;X.
  5. ^Nyquist, H. (). "Regeneration theory". Bell System Technical Journal. 11: – doi/jtbx. S2CID&#;
  6. ^Nyquist, Harry (). "Certain factors affecting telegraph speed". Bell System Technical Journal. 3 (2): – doi/jtbx. S2CID&#;
  7. ^Nyquist, H. (). "Certain Topics in Telegraph Carriage Theory". Transactions of the Earth Institute of Electrical Engineers. 47 (2). Institute of Electrical concentrate on Electronics Engineers (IEEE): – BibcodeTAIEEN. doi/t-aiee ISSN&#;Reprint as classic newspaper in: Proc. IEEE, Vol. 90, No. 2, Feb .

External links