heinrich velkar

heinrich johann velkar (9 sitambar 1912 mein ingolstad mein-25 disambar 1981 mein erlangen mein) ack german saiddhaantik aur anuprayukt bhautik vigyaani they, jinhone "transisteron" kaa aavishkaar kiya, joe kii westinghouse mein nirmit ack transister thaa, joe bell prayogshalaon mein banaae gaye pahale safal transister seey swatantra thaa. unhone aaee. aaee. aaee.-vee. yaugik ardhchalakon mein maulik kaam kiya, aur microwave ardhchaalak tatvon aur lazer diode key liye maarg prashast kiya.
jeevani aur mahatvapurna kaary.
1931 mein shuru karate hue, velkar ney arnold somerfeld key tahat munich vishvavidyalaya mein adhyayan kiya, aur unhein ph. dee. kii upaadhi dee gaee.dee. 1936 mein somerfeld kii pustak "electrodynamics-saiddhaantik bhautiki khand III parr vyakhyan" 1933/1934 key sheetkaleen semester key dauran velkar dwara taiyar kiye gaye vyakhyan tippaniyon parr adharit thee. 1939 mein somerfeld key tahat velkar koo unaki nivaas pradaan kii gaee thee.
yuddh key varshon key dauran, 1940 seey 1945 taka, velkar ney oberphenhafen mein luftfunkforcechung sansthaan mein kaam kiya, lekin phir bhee munich vishvavidyalaya mein closs clusius key bhautik rasayanik sansthaan key saath sambandh (1942 seey 1944) banaae rakhaa. yuddh key baad, 1947-1951 mein, unhone peris mein westinghouse sahayak company, compagny days freens aitt synax westinghouse mein naukari kii. 1951 seey 1961 taka, velkar ney erlangen mein seamens-scurtworke key thhos-avastha bhautiki vibhaag kaa netritva kiya, jahan unhone silicon ardhchalakon koo badalane key liye nae, iii-v yaugikon koo vikasit kiya. unake kaam key parinamswarup galvanomagnetic aur optoelectronic prabhaavon key badey paimaane parr upayog key saath-saath microelectronics mein nae switching circuit bhee hue. velkar aur unake vibhaag ney microwave ardhchalakon aur lazer diode key liye maarg prashast kiya. way 1961 seey 1969 taka erlangen simens-scurtworke anusandhaan prayogshala key nideshak they. 1969 seey 1977 mein sevaanivritt honey taka, velkar company kii sabhi shodh prayogshalaon key nideshak they.
peris mein westinghouse sahayak company mein, velkar aur german bhautik vigyaani herbert aff. matter ney ack bindu sampark ardhchaalak pravardhak vikasit kiya, jiska pradarshan juuna 1948 mein kiya gayaa thaa. yeh 30 juuna 1948 koo ack bindu sampark transister key pradarshan kii bell prayogshala vaigyaanikon dwara kii gaee ghoshana key saath huaa. french westinghouse sahayak ney 13 agast 1948 koo usee prakaar key upkaran parr ack patent key liye aavedan kiya. 18 maee 1949 koo, iss europeeya aavishkaar koo "leey transisteron" yaa "french transister" key roop mein janata key saamane prastut kiya gayaa, jabaki 1,000 upkaranon key pahale batch kaa nirmaan francisi dursanchar key liye kiya gayaa thaa. yeh vikas german radar vikasit karane key karyakramon mein donon dwara germany mein swatantra roop seey kiye gaye kaam kaa ack vikas thaa. 1952 mein francisi patent pradaan kiya gayaa thaa.
velkar koo 1977 mein duesh physicalische gasselshaft kaa adhyaksh chunaa gayaa thaa.
seamens aeye. jee., munich ney 1976 mein III-V yaugik ardhchaalak vikas mein velkar key agrani kaary koo sammaanit karane key liye heinrich velkar smaarak puraskar kii sthaapana kii.

