{"id":94714,"date":"2020-12-10T14:50:56","date_gmt":"2020-12-10T13:50:56","guid":{"rendered":"https:\/\/botland.com.pl\/blog\/wzmacniacz-operacyjny-lm358-smd-szczegoly-na-temat-produktu-i-przyklady-zastosowan\/"},"modified":"2024-11-06T10:29:05","modified_gmt":"2024-11-06T09:29:05","slug":"operacni-zesilovac-lm358-smd-podrobnosti-o-produktu-a-priklady-pouziti","status":"publish","type":"post","link":"https:\/\/botland.cz\/blog\/operacni-zesilovac-lm358-smd-podrobnosti-o-produktu-a-priklady-pouziti\/","title":{"rendered":"Opera\u010dn\u00ed zesilova\u010d LM358 &#8211; SMD &#8211; Podrobnosti o produktu a p\u0159\u00edklady pou\u017eit\u00ed"},"content":{"rendered":"<span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">\u010cas \u010dten\u00ed:<\/span> <span class=\"rt-time\"> 3<\/span> <span class=\"rt-label rt-postfix\">min.<\/span><\/span>\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"94714\" class=\"elementor elementor-94714 elementor-5320\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-0df0635 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"0df0635\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-021d03f\" data-id=\"021d03f\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-46cd729 elementor-widget elementor-widget-text-editor\" data-id=\"46cd729\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><b><a href=\"https:\/\/botland.cz\/operacni-zesilovace\/9880-operacni-zesilovac-lm358p-n-5-ks-5904422309374.html\" data-wpel-link=\"internal\">Opera\u010dn\u00ed zesilova\u010d LM358<\/a> nab\u00edz\u00ed mnoho mo\u017enost\u00ed pou\u017eit\u00ed v nejr\u016fzn\u011bj\u0161\u00edch aplikac\u00edch a m\u00e1 obrovsk\u00e9 mno\u017estv\u00ed dal\u0161\u00edch praktick\u00fdch v\u00fdhod. Pat\u0159\u00ed mezi n\u011b p\u0159edev\u0161\u00edm \u0161irok\u00fd rozsah nap\u00e1jec\u00edho nap\u011bt\u00ed, schopnost fungovat v jednoduch\u00fdch obvodech s jedn\u00edm nap\u00e1jen\u00edm, n\u00edzk\u00e1 spot\u0159eba proudu, \u0161irok\u00e1 \u0161\u00ed\u0159ka p\u00e1sma, n\u00edzk\u00fd klidov\u00fd proud a vestav\u011bn\u00e1 frekven\u010dn\u00ed kompenzace zaru\u010duj\u00edc\u00ed stabiln\u00ed provoz obvodu. <\/b><\/p>\n<p>Mezi obl\u00edben\u00e9 aplikace zesilova\u010de LM358 pat\u0159\u00ed. p\u0159evodn\u00edky m\u011b\u0159ic\u00edho sign\u00e1lu a elektroakustick\u00e9 zesilova\u010de. \u010cip LM358 je velmi obl\u00edben\u00fd jak u amat\u00e9r\u016f, tak u profesion\u00e1l\u016f. Verze v pouzd\u0159e SO8 je ur\u010dena pro povrchovou mont\u00e1\u017e (SMD).   <\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-069e0d9 elementor-widget elementor-widget-image\" data-id=\"069e0d9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/botland.com.pl\/blog\/wp-content\/uploads\/2020\/09\/09880_1c.jpg\" data-elementor-open-lightbox=\"yes\" data-elementor-lightbox-title=\"09880_1c\" data-e-action-hash=\"#elementor-action%3Aaction%3Dlightbox%26settings%3DeyJpZCI6NTUyOTQsInVybCI6Imh0dHBzOlwvXC9ib3RsYW5kLmN6XC9ibG9nXC93cC1jb250ZW50XC91cGxvYWRzXC8yMDIwXC8wOVwvMDk4ODBfMWMuanBnIn0%3D\" data-wpel-link=\"internal\">\n\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"300\" height=\"192\" src=\"https:\/\/botland.cz\/blog\/wp-content\/uploads\/2020\/09\/09880_1c-300x192.jpg\" class=\"attachment-medium size-medium wp-image-55294\" alt=\"\" srcset=\"https:\/\/botland.cz\/blog\/wp-content\/uploads\/2020\/09\/09880_1c-300x192.jpg 300w, https:\/\/botland.cz\/blog\/wp-content\/uploads\/2020\/09\/09880_1c-1024x654.jpg 1024w, https:\/\/botland.cz\/blog\/wp-content\/uploads\/2020\/09\/09880_1c-768x491.jpg 768w, https:\/\/botland.cz\/blog\/wp-content\/uploads\/2020\/09\/09880_1c-640x409.jpg 640w, https:\/\/botland.cz\/blog\/wp-content\/uploads\/2020\/09\/09880_1c.jpg 1080w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/>\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6f59d6d elementor-widget elementor-widget-text-editor\" data-id=\"6f59d6d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3>Opera\u010dn\u00ed zesilova\u010d LM358 &#8211; SMD &#8211; hardwarov\u00e9 vlastnosti<\/h3>\n<p>Integrovan\u00fd obvod LM358 je dvojit\u00fd opera\u010dn\u00ed zesilova\u010d zalo\u017een\u00fd na bipol\u00e1rn\u00edch tranzistorech (BJT). Konstrukce tohoto zesilova\u010de umo\u017e\u0148uje symetrick\u00e9 nap\u00e1jen\u00ed i nap\u00e1jen\u00ed z jednoho zdroje, tak\u017ee jej lze pou\u017e\u00edt i v jednodu\u0161\u0161\u00edch konstrukc\u00edch za\u0159\u00edzen\u00ed nap\u00e1jen\u00fdch z bateri\u00ed. Rozsah nap\u00e1jec\u00edho nap\u011bt\u00ed je mezi 3 V a 30 V, co\u017e umo\u017e\u0148uje, aby \u010dip LM358 pracoval s modern\u00edmi za\u0159\u00edzen\u00edmi zalo\u017een\u00fdmi na procesoru ARM, kter\u00e1 jsou nap\u00e1jena standardn\u00edm nap\u00e1jec\u00edm nap\u011bt\u00edm 3,3 V, ale lze jej nap\u00e1jet tak\u00e9 symetricky nap\u011bt\u00edm \u00b115 V, co\u017e je b\u011b\u017en\u00e9 nap\u00e1jen\u00ed v audio zesilova\u010d\u00edch. Vestav\u011bn\u00e1 frekven\u010dn\u00ed kompenzace zvy\u0161uje stabilitu \u010dipu LM358. Tento zesilova\u010d m\u016f\u017ee pracovat v r\u016fzn\u00fdch konfigurac\u00edch typick\u00fdch pro opera\u010dn\u00ed zesilova\u010de, nap\u0159\u00edklad jako nap\u011b\u0165ov\u00fd sledova\u010d, integra\u010dn\u00ed obvod, diferen\u010dn\u00ed obvod, gener\u00e1tor polyharmonick\u00e9ho pr\u016fb\u011bhu, frekven\u010dn\u00ed filtr nebo kompar\u00e1tor nap\u011bt\u00ed.    &nbsp;<\/p>\n<p>Obr. 1 ukazuje ekvivalentn\u00ed sch\u00e9ma zapojen\u00ed LM358 v pouzd\u0159e pro povrchovou mont\u00e1\u017e SOIC8 (SMD).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b2b6704 elementor-widget elementor-widget-image\" data-id=\"b2b6704\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"392\" height=\"228\" src=\"https:\/\/botland.cz\/blog\/wp-content\/uploads\/2020\/11\/schematwypr.png\" class=\"attachment-large size-large wp-image-55320\" alt=\"\" srcset=\"https:\/\/botland.cz\/blog\/wp-content\/uploads\/2020\/11\/schematwypr.png 392w, https:\/\/botland.cz\/blog\/wp-content\/uploads\/2020\/11\/schematwypr-300x174.png 300w\" sizes=\"(max-width: 392px) 100vw, 392px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Obr. 1 - sch\u00e9ma v\u00fdvod\u016f \u010dipu LM358 v pouzd\u0159e SOIC8<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-89f954a elementor-widget elementor-widget-text-editor\" data-id=\"89f954a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-size: 1rem;\">Funkce jednotliv\u00fdch vodi\u010d\u016f obvodu podle obr. 1 jsou n\u00e1sleduj\u00edc\u00ed: <\/span><\/p>\n<ul>\n<li>1 &#8211; V\u00fdstup \u010d. 1<\/li>\n<li>2 &#8211; Invertuj\u00edc\u00ed vstup \u010d. 1<\/li>\n<li>3 &#8211; Neinvertuj\u00edc\u00ed vstup \u010d. 1<\/li>\n<li>4 &#8211; Zem (GND) \/ z\u00e1porn\u00e9 nap\u00e1jec\u00ed nap\u011bt\u00ed (VEE)<\/li>\n<li>5 &#8211; Neinvertuj\u00edc\u00ed vstup \u010d. 2<\/li>\n<li>6 &#8211; Invertuj\u00edc\u00ed vstup \u010d. 2<\/li>\n<li>7 &#8211; V\u00fdstup \u010d. 2<\/li>\n<li>8 &#8211; Kladn\u00e9 nap\u00e1jec\u00ed nap\u011bt\u00ed (VCC)<\/li>\n<\/ul>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7bba108 elementor-widget elementor-widget-text-editor\" data-id=\"7bba108\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3>Opera\u010dn\u00ed zesilova\u010d LM358 jako kompar\u00e1tor nap\u011bt\u00ed<\/h3>\n\n\n<p>\nJednou z nejobl\u00edben\u011bj\u0161\u00edch a nejjednodu\u0161\u0161\u00edch aplikac\u00ed opera\u010dn\u00edho zesilova\u010de LM358 je jeho pou\u017eit\u00ed jako kompar\u00e1toru nap\u011bt\u00ed. \u00dakolem takov\u00e9ho obvodu je porovnat dv\u011b nap\u011bt\u00ed p\u0159iveden\u00e1 na jeho vstupy a podle toho, na kter\u00e9m vstupu je ni\u017e\u0161\u00ed nap\u011bt\u00ed a na kter\u00e9m vy\u0161\u0161\u00ed, vydat na v\u00fdstupu logick\u00fd n\u00edzk\u00fd nebo vysok\u00fd stav. P\u0159\u00edklad sch\u00e9matu zapojen\u00ed obvodu LM358 v re\u017eimu kompar\u00e1toru je uveden na obr\u00e1zku 2. V takov\u00e9m obvodu je zesilova\u010d nap\u00e1jen samostatn\u011b vzhledem k zemi. Na jeho invertuj\u00edc\u00ed vstup je p\u0159ipojen zdroj referen\u010dn\u00edho nap\u011bt\u00ed &#8220;VREF&#8221;, jeho\u017e hodnota z\u00e1vis\u00ed na hodnot\u011b rezistor\u016f R1 a R2 tvo\u0159\u00edc\u00edch d\u011bli\u010d nap\u011bt\u00ed podle vztahu (1.1).     \n<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2034cfa elementor-widget elementor-widget-image\" data-id=\"2034cfa\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"512\" height=\"280\" src=\"https:\/\/botland.cz\/blog\/wp-content\/uploads\/2020\/05\/Wzmacniacz-operacyjny-LM358.jpg\" class=\"attachment-large size-large wp-image-54167\" alt=\"\" srcset=\"https:\/\/botland.cz\/blog\/wp-content\/uploads\/2020\/05\/Wzmacniacz-operacyjny-LM358.jpg 512w, https:\/\/botland.cz\/blog\/wp-content\/uploads\/2020\/05\/Wzmacniacz-operacyjny-LM358-300x164.jpg 300w\" sizes=\"(max-width: 512px) 100vw, 512px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Obr. 2 - Opera\u010dn\u00ed zesilova\u010d LM358 v obvodu kompar\u00e1toru<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5f753e4 elementor-widget elementor-widget-image\" data-id=\"5f753e4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"121\" height=\"49\" src=\"https:\/\/botland.cz\/blog\/wp-content\/uploads\/2020\/05\/wzmacniacz_wzor.png\" class=\"attachment-medium size-medium wp-image-54172\" alt=\"\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6bc4b82 elementor-widget elementor-widget-text-editor\" data-id=\"6bc4b82\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>\nPrincip takov\u00e9ho obvodu spo\u010d\u00edv\u00e1 v p\u0159iveden\u00ed nap\u011bt\u00ed na vstup &#8220;VIN&#8221;, jeho porovn\u00e1n\u00ed s nap\u011bt\u00edm &#8220;VREF&#8221; a vyd\u00e1n\u00ed odpov\u00eddaj\u00edc\u00edho logick\u00e9ho stavu na v\u00fdstupu &#8220;VOUT&#8221;. Pokud je nap\u011bt\u00ed na vstupu &#8220;VIN&#8221; men\u0161\u00ed ne\u017e nap\u011bt\u00ed &#8220;VREF&#8221;, udr\u017euje se na v\u00fdstupu kompar\u00e1toru n\u00edzk\u00fd stav, tj. nap\u011bt\u00ed s hodnotou bl\u00edzkou nap\u00e1jec\u00edmu nap\u011bt\u00ed zem\u011b. Na druh\u00e9 stran\u011b, kdy\u017e je na vstup &#8220;VIN&#8221; p\u0159ivedeno nap\u011bt\u00ed vy\u0161\u0161\u00ed ne\u017e referen\u010dn\u00ed nap\u011bt\u00ed &#8220;VREF&#8221;, je na v\u00fdstupu &#8220;VOUT&#8221; zesilova\u010de udr\u017eov\u00e1n vysok\u00fd stav, tj. nap\u011bt\u00ed s hodnotou bl\u00edzkou nap\u00e1jec\u00edmu zemn\u00edmu nap\u011bt\u00ed &#8220;+VCC&#8221;. P\u0159\u00edklady aplikac\u00ed obvodu LM358 pracuj\u00edc\u00edho v re\u017eimu kompar\u00e1toru zahrnuj\u00ed termostat, regul\u00e1tor v\u00fdstupn\u00edho nap\u011bt\u00ed altern\u00e1toru a tak\u00e9 m\u011b\u0159ic\u00ed p\u0159\u00edstroje.     \n<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-dfd4d7f elementor-widget elementor-widget-text-editor\" data-id=\"dfd4d7f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3>LM358 jako gener\u00e1tor \u010dasov\u00e9ho pr\u016fb\u011bhu<\/h3>\n\n\n<p>\nOpera\u010dn\u00ed zesilova\u010de, v\u010detn\u011b LM358, lze pou\u017e\u00edt tak\u00e9 jako gener\u00e1tory, tj. obvody, kter\u00e9 vytv\u00e1\u0159ej\u00ed vhodn\u011b tvarovan\u00e9 \u010dasov\u00e9 pr\u016fb\u011bhy nap\u011bt\u00ed. Obr. 3 ukazuje sch\u00e9ma p\u0159\u00edkladu pou\u017eit\u00ed obvodu LM358 jako regulovan\u00e9ho gener\u00e1toru troj\u00faheln\u00edkov\u00e9ho pr\u016fb\u011bhu.\n<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-523ae7c elementor-widget elementor-widget-image\" data-id=\"523ae7c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"655\" height=\"303\" src=\"https:\/\/botland.cz\/blog\/wp-content\/uploads\/2020\/05\/WzmacniaczoperacyjnyLM358-_img2.png\" class=\"attachment-large size-large wp-image-54169\" alt=\"\" srcset=\"https:\/\/botland.cz\/blog\/wp-content\/uploads\/2020\/05\/WzmacniaczoperacyjnyLM358-_img2.png 655w, https:\/\/botland.cz\/blog\/wp-content\/uploads\/2020\/05\/WzmacniaczoperacyjnyLM358-_img2-300x139.png 300w, https:\/\/botland.cz\/blog\/wp-content\/uploads\/2020\/05\/WzmacniaczoperacyjnyLM358-_img2-640x296.png 640w\" sizes=\"(max-width: 655px) 100vw, 655px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Obr. 3 - Opera\u010dn\u00ed zesilova\u010d LM358 v obvodu gener\u00e1toru troj\u00faheln\u00edkov\u00e9ho sign\u00e1lu s funkc\u00ed \u0159\u00edzen\u00ed frekvence a amplitudy pulz\u016f<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3999736 elementor-widget elementor-widget-text-editor\" data-id=\"3999736\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-vol_znaki=\"422\" vol_tool_text_number=\"true\" class=\" \"><span style=\"font-size: 1rem;\" class=\"\">K sestaven\u00ed takov\u00e9ho obvodu byly pou\u017eity dva zesilova\u010de standardizovan\u00e9 v jednom obvodu LM358. Na v\u00fdstupu &#8220;TRI OUT&#8221; se z\u00edsk\u00e1 troj\u00faheln\u00edkov\u00fd sign\u00e1l, jeho\u017e frekvence je regulovan\u00e1 a z\u00e1vis\u00ed na nastaven\u00ed potenciometru RV2, p\u0159i\u010dem\u017e amplituda tohoto sign\u00e1lu je konstantn\u00ed bez ohledu na nastaven\u00ed frekvence. Regulace amplitudy sign\u00e1lu (nastaven\u00edm hystereze) se prov\u00e1d\u00ed potenciometrem RV1.  &nbsp;<\/span><\/p>\n<p data-vol_znaki=\"392\" vol_tool_text_number=\"true\" class=\" \"><span style=\"font-size: 1rem;\" class=\"\">Obvod U1B je integr\u00e1tor, tj. integruje nap\u011bt\u00ed p\u0159iveden\u00e9 na jeho invertuj\u00edc\u00ed vstup a funguje jako gener\u00e1tor pilovit\u00e9ho nap\u011bt\u00ed, zat\u00edmco obvod U1A funguje jako prahov\u00fd detektor s funkc\u00ed resetu, kter\u00fd funguje podobn\u011b jako Schmitt\u016fv klopn\u00fd obvod s hysterez\u00ed. Hystereze je \u0159\u00edzena potenciometrem RV1 um\u00edst\u011bn\u00fdm ve zp\u011btnovazebn\u00ed smy\u010dce spolu s rezistorem R1.  &nbsp;<\/span><\/p>\n<p data-vol_znaki=\"1464\" vol_tool_text_number=\"true\" class=\" \"><span style=\"font-size: 1rem;\" class=\"\">Princip \u010dinnosti obvodu spo\u010d\u00edv\u00e1 v periodick\u00e9 zm\u011bn\u011b hodnoty satura\u010dn\u00edho nap\u011bt\u00ed na v\u00fdstupu obvodu U1A a generov\u00e1n\u00ed kladn\u00e9 a z\u00e1porn\u00e9 hrany troj\u00faheln\u00edkov\u00e9ho sign\u00e1lu na v\u00fdstupu obvodu U1B v opakovan\u00e9m, tj. periodicky. Obvod prahov\u00e9ho detektoru, postaven\u00fd na zesilova\u010di U1A, m\u011bn\u00ed sv\u016fj stav na v\u00fdstupu podle nap\u011bt\u00ed na v\u00fdstupu &#8220;TRI OUT&#8221;, kter\u00e9 je p\u0159ivedeno zp\u011btnou vazbou p\u0159es rezistor R3 na neinvertuj\u00edc\u00ed vstup zesilova\u010de U1A. Frekvence sign\u00e1lu na v\u00fdstupu integr\u00e1toru U1B z\u00e1vis\u00ed na odporu rezistoru R2, nastaven\u00ed potenciometru RV2, kapacit\u011b kondenz\u00e1toru C1 a na maxim\u00e1ln\u00ed a minim\u00e1ln\u00ed hodnot\u011b satura\u010dn\u00edho nap\u011bt\u00ed na neinvertuj\u00edc\u00edm vstupu prahov\u00e9ho detektoru U1A. Na druh\u00e9 stran\u011b se amplituda sign\u00e1lu na v\u00fdstupu integr\u00e1toru U1B vypo\u010d\u00edt\u00e1 z pom\u011bru odporu rezistoru R3 k sou\u010dtu odporu rezistoru R1 a nastaven\u00ed odporu potenciometru RV1, p\u0159i\u010dem\u017e se zohledn\u00ed hodnoty satura\u010dn\u00edch nap\u011bt\u00ed detektoru U1A. Vzestupn\u00e1 a sestupn\u00e1 hrana, kter\u00e9 tvo\u0159\u00ed troj\u00faheln\u00edkov\u00fd pr\u016fb\u011bh, maj\u00ed stejnou dobu trv\u00e1n\u00ed a amplitudu, kdy\u017e se satura\u010dn\u00ed nap\u011bt\u00ed v U1A vzhledem k modulu navz\u00e1jem rovnaj\u00ed. \u00darove\u0148 sign\u00e1lu na v\u00fdstupu &#8220;TRI OUT&#8221; m\u016f\u017ee b\u00fdt vyv\u00e1\u017een\u00e1 vzhledem k potenci\u00e1lu zem\u011b, kdy\u017e se na invertuj\u00edc\u00ed vstup prahov\u00e9ho detektoru zalo\u017een\u00e9ho na zesilova\u010di U1A zavede kompenzace nesymetrick\u00e9ho nap\u011bt\u00ed. Obvod gener\u00e1toru troj\u00faheln\u00edkov\u00e9ho sign\u00e1lu vy\u017eaduje symetrick\u00e9 nap\u00e1jec\u00ed nap\u011bt\u00ed.       &nbsp;<\/span><\/p>\n<p class=\"\"><span style=\"font-size: 1rem;\" class=\"\"><b>Takov\u00fd gener\u00e1tor pr\u016fb\u011bh\u016f lze pou\u017e\u00edt jako zdroj testovac\u00edho sign\u00e1lu<\/b> pro diagnostiku elektroakustick\u00fdch zesilova\u010d\u016f a jako zdroj zvukov\u00e9ho a modula\u010dn\u00edho sign\u00e1lu v hudebn\u00edch syntez\u00e1torech.<\/span><\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Opera\u010dn\u00ed zesilova\u010d LM358 v pouzd\u0159e SMD SOIC8 &#8211; univerz\u00e1ln\u00ed integrovan\u00fd obvod. Prozkoumejte technick\u00e9 podrobnosti na blogu Botland. <\/p>\n","protected":false},"author":5,"featured_media":60702,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[548],"tags":[],"class_list":["post-94714","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-elektronika-cs"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Opera\u010dn\u00ed zesilova\u010d LM358 - SMD - Podrobnosti o produktu a p\u0159\u00edklady pou\u017eit\u00ed - Botland<\/title>\n<meta name=\"description\" content=\"Opera\u010dn\u00ed zesilova\u010d LM358 v pouzd\u0159e SMD SOIC8 - univerz\u00e1ln\u00ed integrovan\u00fd obvod. 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