Oscilloscope Display Circuit

Cov khoom siv hluav taws xob muaj ob ntu: lub raj oscilloscope thiab tswj Circuit Court. Oscilloscope raj yog ib hom tshwj xeeb ntawm cov raj hluav taws xob, uas yog ib qho tseem ceeb ntawm oscilloscope. Lub oscilloscope raj muaj peb ntu: rab phom electron, deflection system, thiab fluorescent screen.
(1) Electron phom
Cov phom hluav taws xob yog siv los tsim thiab tsim kom muaj kev kub ceev, bunched electron kwj uas tawg lub fluorescent screen kom nws ci. Nws yog tsim los ntawm filament F, cathode K, tswj electrode G, thawj anode A1, thiab thib ob anode A2. Tsuas yog cov filament, cov qauv ntawm lwm cov electrodes yog ib lub tog raj kheej hlau, thiab lawv cov axis centre yog khaws cia rau tib lub axis. Tom qab rhuab, lub cathode tuaj yeem emit electrons raws li axial kev taw qhia; Tus tswj electrode muaj qhov tsis zoo uas cuam tshuam rau cathode. Hloov lub peev xwm tuaj yeem hloov pauv tus naj npawb ntawm cov hluav taws xob dhau los ntawm kev tswj hwm aperture, uas yog los tswj qhov ci ntawm lub teeb me ntsis ntawm lub vijtsam fluorescent. Txhawm rau txhim kho qhov ci ntsa iab ntawm lub teeb ntawm lub vijtsam yam tsis muaj kev txo qis rau cov hluav taws xob hluav taws xob deflection, tom qab acceleration electrode A3 kuj tseem ntxiv ntawm deflection system thiab fluorescent screen hauv cov raj oscilloscope niaj hnub.
Thawj qhov anode siv qhov zoo voltage txog li ob peb puas volts rau cathode. Qhov zoo voltage siab dua thawj anode yog siv rau lub thib ob anode. Cov kab hluav taws xob hla dhau ntawm lub qhov tswj tau nrawm los ntawm lub peev xwm siab ntawm thawj anode thiab thib ob anode, thiab txav mus rau qhov kub ceev ntawm lub vijtsam fluorescent. Vim lub repulsion ntawm tib nqi, lub electron beam yuav maj mam disperse. Los ntawm kev tsom mus rau hluav taws xob teb ntawm thawj anode thiab thib ob anode, electrons rov los sib sau ua ke thiab sib sau ua ke ntawm ib qho chaw. Kev tswj xyuas qhov loj ntawm qhov muaj peev xwm sib txawv ntawm thawj anode thiab qhov thib ob anode tuaj yeem ua kom pom tseeb tsuas yog poob rau ntawm lub vijtsam fluorescent, pom qhov kaj thiab me me. Kev hloov pauv qhov sib txawv ntawm thawj anode thiab thib ob anode tuaj yeem kho qhov ua kom pom tseeb ntawm lub teeb pom kev, uas yog lub hauv paus ntsiab lus ntawm "focusing" thiab "auxiliary focusing" kev hloov ntawm oscilloscope. Qhov thib peb anode yog tsim los ntawm txheej txheej ntawm graphite nyob rau hauv lub khob hliav qab ntawm oscilloscope raj, feem ntau yog ib tug high voltage. Nws muaj peb lub zog: ① kom txuas ntxiv mus nrawm dua cov tshuab hluav taws xob dhau los ntawm kev tiv thaiv hluav taws xob, tso cai rau cov tshuab hluav taws xob kom muaj lub ntsej muag txaus rau lub ntsej muag zoo nkauj kom txaus; ② Graphite txheej txheej ntawm tag nrho lub khob hliav qab tuaj yeem ua lub luag haujlwm tiv thaiv; ③ Electron beam bombardment of the fluorescent screen will generate secondary electrons, uas tuaj yeem nqus tau los ntawm A3 ntawm lub peev xwm siab.