{"id":52,"date":"2024-04-04T03:04:47","date_gmt":"2024-04-04T00:04:47","guid":{"rendered":"https:\/\/sisu.ut.ee\/elektroonika\/73-baasivoolu-suurus\/"},"modified":"2024-04-04T03:05:53","modified_gmt":"2024-04-04T00:05:53","slug":"73-baasivoolu-suurus","status":"publish","type":"page","link":"https:\/\/sisu.ut.ee\/elektroonika\/73-baasivoolu-suurus\/","title":{"rendered":"7.3. Baasivoolu suurus"},"content":{"rendered":"<p><span data-mce-mark=\"1\">Eelmistes videotes n\u00e4gime, et liiga suure baasivooluga v\u00f5ib transistor l\u00e4bi p\u00f5leda. Baasivoolu piiramiseks pannakse baasi ette takisti. Aga kui suurt baasivoolu on vaja, et transistor avada? Selles videos n\u00e4itame, kuidas arvutada baasi takisti v\u00e4\u00e4rtust, et baasivool oleks vajaliku tugevusega.<\/span><\/p>\n<p><span data-mce-mark=\"1\"><span data-mce-mark=\"1\"><div class=\"ratio ratio-16x9 mb-3\"><div class=\"video-placeholder-wrapper video-placeholder-wrapper--16x9\">\n\t\t\t    <div class=\"video-placeholder d-flex justify-content-center align-items-center\">\n\t\t\t        <div class=\"overlay text-white p-2 w-100 text-center d-block justify-content-center align-items-center\">\n\t\t\t            <div>Kolmandate osapoolte sisu n\u00e4gemiseks palun n\u00f5ustu k\u00fcpsistega.<\/div>\n\t\t\t            <button class=\"btn btn-secondary btn-sm mt-1 consent-change\">Muuda n\u00f5usolekut<\/button>\n\t\t\t        <\/div>\n\t\t\t    <\/div>\n\t\t\t<\/div>\n<\/div><\/span><\/span><\/p>\n<p style=\"text-align: center\"><a href=\"https:\/\/youtu.be\/V_vCSzndlGw\" target=\"_blank\" rel=\"noopener\"><span data-mce-mark=\"1\">https:\/\/youtu.be\/V_vCSzndlGw<\/span><\/a><\/p>\n<h5><img loading=\"lazy\" decoding=\"async\" width=\"40\" height=\"40\" class=\"alignnone wp-image-78\" style=\"margin-left: 10px;margin-right: 10px\" src=\"https:\/\/sisu.ut.ee\/wp-content\/uploads\/sites\/189\/tahtis.png\" title=\"tahtis.png\" alt=\"tahtis.png\">\u00a0J\u00e4ta meelde!<\/h5>\n<p><strong>\u00dcks olulisemaid transistore iseloomustavatest parameetritest on vooluv\u00f5imendustegur. See n\u00e4itab kui mitu korda saab kollektorivool olla baasivoolust suurem. vooluv\u00f5imendustegurit t\u00e4histatakse kreeka t\u00e4hega \u03b2 (beta).<\/strong><\/p>\n<p><strong>Koormus, mida transistoriga juhitakse m\u00e4\u00e4rab vajaliku kollektorivoolu tugevuse. Teades minimaalset beta v\u00e4\u00e4rtust antud transistori jaoks saa arvutada mis on minimaalne vajalik baasivool, et tagada transistori avanemine. Sellest omakorda saab arvutada v\u00e4lja baasivoolu tugevuse.<\/strong><\/p>\n<h5><img loading=\"lazy\" decoding=\"async\" width=\"40\" height=\"40\" class=\"alignnone wp-image-77\" style=\"margin-left: 10px;margin-right: 10px\" src=\"https:\/\/sisu.ut.ee\/wp-content\/uploads\/sites\/189\/motle.png\" title=\"motle.png\" alt=\"motle.png\">\u00a0M\u00f5tle ja tee kaasa!<\/h5>\n<p style=\"padding-left: 30px\">1. Videos ajavahemikul 04:51 \u2013 05:45 j\u00f5udsime j\u00e4reldusele, et baasivool peab olema minimaalselt 0,75mA, et kollektori vool saaks olla 150mA. Mis oleks kollektorivool, kui baasivool oleks 0,1mA ja beta on 200?\u00a0<br>2. Kui koormusel on vaja 100mA voolu ning transistor piirab seda 20mA peal, kas transistori v\u00f5ib lugeda avatuks?\u00a0<br>3. Me tahame l\u00fclitada transistori abil lampi, mis v\u00f5tab 390mA voolu. Transistori beta on 200.<\/p>\n<ul>\n<ul>\n<li>a.\u00a0<span data-mce-mark=\"1\">Mis on minimaalne transistori l\u00e4bilaskev\u00f5ime, et juhtida sellist lampi?<\/span><\/li>\n<li>b.\u00a0Mis on minimaalne vajalik baasivool, et transistor avaneks piisavalt sellise koormuse juhtimiseks?\u00a0<\/li>\n<li>c.\u00a0Kui juhtsignaal tuleb 5V v\u00e4ljundiga mikroskeemist, mis peab olema baasi takisti v\u00e4\u00e4rtus, et baasivool oleks vajaliku tugevusega?\u00a0<\/li>\n<\/ul>\n<\/ul>\n<p style=\"padding-left: 30px\"><span data-mce-mark=\"1\">4. V\u00f5ta m\u00f5ned erinevate tootjate BC547B andmelehed ning v\u00f5rdle, mida erinevad tootjad m\u00e4rgivad j\u00e4rgmiste parameetrite v\u00e4\u00e4rtusteks:<\/span><\/p>\n<ul>\n<ul>\n<li>a.\u00a0<span data-mce-mark=\"1\">vooluv\u00f5imendustegur<\/span><\/li>\n<li>b.\u00a0<span data-mce-mark=\"1\">maksimaalne lubatud kollektorivool<\/span><\/li>\n<li>c.\u00a0<span data-mce-mark=\"1\">maksimaalne lubatud baasivool<\/span><\/li>\n<\/ul>\n<\/ul>\n<p><\/p><div class=\"accordion mb-3\">\n        <div class=\"accordion-item accordion-item--white\">\n        <h2 class=\"accordion-header\" id=\"accordion-69d2bdc500229-heading\">\n            <button class=\"accordion-button collapsed\" type=\"button\" data-bs-toggle=\"collapse\" data-bs-target=\"#accordion-69d2bdc500229-collapse\" aria-expanded=\"true\" aria-controls=\"accordion-69d2bdc500229-collapse\">Vastus<\/button>\n        <\/h2>\n        <div id=\"accordion-69d2bdc500229-collapse\" class=\"accordion-collapse collapse\" aria-labelledby=\"accordion-69d2bdc500229-heading\">\n            <div class=\"accordion-body\">\n<p>1. Mis oleks kollektorivool, kui baasivool oleks 0,1mA ja beta on 200?\u00a0<span style=\"color: #008000\" data-mce-mark=\"1\"><strong>20mA<\/strong><\/span><\/p>\n<p>2. Kui koormusel on vaja 100mA voolu ning transistor piirab seda 20mA peal, kas transistori v\u00f5ib lugeda avatuks? <span style=\"color: #008000\" data-mce-mark=\"1\"><strong>Ei<\/strong><\/span><br>3. Me tahame l\u00fclitada transistori abil lampi, mis v\u00f5tab 390mA voolu. Transistori beta on 200.<\/p>\n<p><span data-mce-mark=\"1\"><\/span><\/p>\n<ul>\n<li>a.\u00a0Mis on minimaalne transistori l\u00e4bilaskev\u00f5ime, et juhtida sellist lampi?\u00a0<span style=\"color: #008000\"><span style=\"color: #008000\"><strong>390mA<\/strong><\/span><\/span><\/li>\n<li>b.\u00a0Mis on minimaalne vajalik baasivool, et transistor avaneks piisavalt sellise koormuse juhtimiseks?\u00a0<span style=\"color: #008000\"><strong>1,95mA<\/strong><\/span><\/li>\n<li>c.\u00a0Kui juhtsignaal tuleb 5V v\u00e4ljundiga mikroskeemist, mis peab olema baasi takisti v\u00e4\u00e4rtus, et baasivool oleks vajaliku tugevusega?\u00a0<span style=\"color: #008000\"><strong>2,2k\u2126<\/strong><\/span><\/li>\n<\/ul>\n<p><\/p><\/div>\n        <\/div>\n        <\/div>\n    <\/div>\u00a0\n","protected":false},"excerpt":{"rendered":"<p>Eelmistes videotes n\u00e4gime, et liiga suure baasivooluga v\u00f5ib transistor l\u00e4bi p\u00f5leda. Baasivoolu piiramiseks pannakse baasi ette takisti. Aga kui suurt baasivoolu on vaja, et transistor avada? Selles videos n\u00e4itame, kuidas arvutada baasi takisti v\u00e4\u00e4rtust, et baasivool oleks vajaliku tugevusega. Kolmandate &#8230;<\/p>\n","protected":false},"author":93,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"class_list":["post-52","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/sisu.ut.ee\/elektroonika\/wp-json\/wp\/v2\/pages\/52","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sisu.ut.ee\/elektroonika\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/sisu.ut.ee\/elektroonika\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/sisu.ut.ee\/elektroonika\/wp-json\/wp\/v2\/users\/93"}],"replies":[{"embeddable":true,"href":"https:\/\/sisu.ut.ee\/elektroonika\/wp-json\/wp\/v2\/comments?post=52"}],"version-history":[{"count":1,"href":"https:\/\/sisu.ut.ee\/elektroonika\/wp-json\/wp\/v2\/pages\/52\/revisions"}],"predecessor-version":[{"id":223,"href":"https:\/\/sisu.ut.ee\/elektroonika\/wp-json\/wp\/v2\/pages\/52\/revisions\/223"}],"wp:attachment":[{"href":"https:\/\/sisu.ut.ee\/elektroonika\/wp-json\/wp\/v2\/media?parent=52"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}