The common information introduces basically single power supply (3 ~ 7V) power supply, in fact TDA1308 is also a dual op amp, pin function and NE5502 and other op amps are exactly the same. However, using it to directly replace common NE5332 and other op amps has certain difficulties, because its operating voltage is very low (up to only ± 3.5V), and the size is only 5.8mm × 4.8mm × 1.75mm. And these "disadvantages" and its extremely low power consumption (quiescent current is about 3mA, working time is about 5mA) and working voltage (can be as low as ± 1.2V, at this time the sound quality can still not hear changes) is undoubtedly made The first choice for miniature low-voltage circuits (such as stereo speakers and radios). Another advantage of TDA1308 is its extremely high signal-to-noise ratio (up to 100dB). Actual audition shows that its signal-to-noise ratio is significantly better than that of NE5332, LF355 and other op amps.
The Hi-Fi stereo player made with TDA1308 is introduced below. The circuit is shown below. One is used for each channel, and the two amplifying units are used as the front and power amplifiers respectively, which improves the separation of the channels, and its three-dimensional sense is very good. The choice of the motor speed-stabilizing circuit is large, as long as the working voltage is appropriate, such as AN6650, KA2200, etc., will not be introduced here. It should be pointed out that TDA1308 uses MOSFET as input stage and output stage, the input bias current can be almost neglected, which prevents the possibility that the bias current will be magnetized by the ambassador head. This is also the op amp that uses transistors as input stage in NE5532 Out of reach.
The circuit uses dual power supply, the voltage can be selected between ± 1.5V to ± 3V. Because the coupling capacitor is omitted, and the high signal-to-noise ratio of TDA1308 makes the background noise almost inaudible, the sound quality is very transparent and clear.
It may be because the TDA1308 has a low operating voltage and a small current. I always feel that its strength is slightly smaller, slightly thinner, and it feels a bit powerless when pushing a slightly higher power headset. But its crisp tone is still worth burning.
Follow WeChat
Interesting and informative information and technical dry goods
Download Audiophile APP
Create your own personal electronic circle
Follow the audiophile class
Lock the latest course activities and technical live broadcast
comment
Publish
related suggestion
Quit '; * / var login_content =' write an article ![]()
'+ data.username +'
Set exit '; $ (' # login_area '). Html (login_content); var win_width = $ (window) .width (); if (win_width> 1000) {$ ("# mine"). MouseDelay (200) .hover (function () {$ ("# mymenu"). show ();}, function () {$ ("# mymenu"). hide ();});}} else {var content = 'Login Registration'; $ ('# login_area'). html (content); $ (". special-login"). click (function (e) {$ .tActivityLogin (); return false;});}});} $ (function () {// comment ------------------------------- var comment = $ ("# comment"); var comment_input = $ ("# comContent"); // Submit comment click event interaction $ ("# comSubmit2"). on ('click', function () {var content = comment_input.text (); // Empty input box comment_input. html (""). focus (); // Submit data to server $ .ajax ({url: '/plus/arcComment.php', data: {aid: $ ("# webID"). val (), dopost : 'apiPubComment', content: content}, type: 'post', dataType: 'json', success: function (data) {// Data format returned: if (data.status == "successed") {// Build temporary comment DOM var dom = ''; dom + = '
'; dom + =' ![]()
'; dom + ='
'; dom + ='
'+ data.data.username +' '; dom + ='
'; dom + =' '+ content +' '; dom + =' '; dom + =' just now '; dom + =' '; dom + =' '; // insert a temporary comment to the list $ ("# comment ") .append (dom);} if (data.status ==" failed ") {// alert (data.msg); layer.msg (data.msg);}}}); return false;}); (function () {/ * * Insert single sign-on JS * / var setHost = 'https://passport.elecfans.com'; // Set domain name var script = document.createElement ('script'); script.type = 'text / javascript'; script.src = setHost + '/public/pc/js/t.passport.js'; script.setAttribute ("id", "sso_script"); script.setAttribute ("data-ssoSite", setHost); script.setAttribute ("data-ssoReferer", encodeURIComponent (location.href)); script.setAttribute ("data-ssoSiteid", "11"); var body = document.getElementsByTagName ("body"). item ( 0); body.appendChild (script);}) () / * * It is recommended to modify the style of the article without a picture * * / $ (". Article .thumb"). Each (function () {if ($ (this). find ('img'). attr ('src') == "") {$ (this) .find ('img'). remove (); $ (this) .parent (). css ('padding-left ',' 0px ');}}); / * Baidu share * / window._bd_share_config = {common: {bdText: '', // Custom share content bdDesc: '', // Custom share summary bdUrl: window.location.href, // Custom share URL address bdPic: ''} , share: [{"bdSize": 60, "bdCustomStyle": true}]} with (document) 0 [(getElementsByTagName ('head') [0] || body) .appendChild (createElement ('script')). src = 'http://bdimg.share.baidu.com/static/api/js/share.js?cdnversion=' + ~ (-new Date () / 36e5)]; var add_url = '/ d / article / write / '; // var check_allow = "{: U (' Api / iscantalk ')}"; var check_allow = "/ d / api / iscantalk"; var click_items_length = $ ('. art_click_count '). length; if ( click_items_length> 0) {var id_str = ''; $ ('. art_click_count'). each (function () {id_str + = $ (this) .attr ('data-id') + ',';}) // var url = "{: U ('Api / getclickbyids')}"; var url = "/ d / api / getclickbyids"; var id_data = 'id_str =' + id_str; $ .ajax ({url: url, data: id_data, type: 'post', dataType: 'json', success: function (re) {if (re.list.length> = 1) {var list = re.list; for (var i in list) {var t emp_id = list [i] ['id']; var temp_span = $ (". art_click_count [data-id =" + temp_id + "]") temp_span.html (list [i] ['click']);}} }})} $ ("# comContent"). click (function () {if (now_uid == '') {$ .tActivityLogin (); return false;}}) $ (function () {var follow_wrap = $ ( ".author-collect"); var now_uid = "{$ _super ['uid']}"; var face_src = "{$ _super ['uface']}"; var getFollowNum = $ (". followNum strong"). html (); // Follow $ (window) .on ('click', '.author-collect', function () {if (now_uid == '') {$ .tActivityLogin (); return false;} if ( $ (this) .attr ('id') == 'follow') {$ .post ('/ d / user / follow', {tuid: article_user_id}, function (data) {// Data format returned: if (data.status == "successed") {$ (". followNum strong"). html (++ getFollowNum); follow_wrap.html ('followed'). attr ('id', 'cancelFollow'). css ( 'background', '# 999'); var follow_user = ' ![]()
'; $ (' # follow_list '). append (follow_user);} if (data.status == "failed") {alert (data.msg);}});} else {// Unfollow if ($ ( this) .attr ('id') == 'cancelFollow') {$ .post ('/ d / user / cancelFollow', {tuid: article_user_id}, function (data) {// Data format returned: if (data .status == "successed") {follow_wrap.html ('Follow'). attr ('id', 'follow'). css ('background', '# f90'); $ (". followNum strong"). html (-getFollowNum); $ ('# follow_list .face'). each (function () {var target_uid = $ (this) .attr ('data-uid'); if (target_uid == now_uid) {$ ( this) .remove ();}})} if (data.status == "failed") {alert (data.msg);}}); return false;}}});});}); / * var myface = "{$ _super ['uid'] | avatar}"; var myname = "{$ _super ['username']}"; var article_id = {$ article ['id']}; var article_user_id = {$ article ['mid']}; // Article author ID $ (function () {<notempty name = "clearnum"> // Reduce the number of reminders var count = parseInt ($ ("# noticeCount"). html ()); count = count-{$ clearnum}; $ ("# noticeCount"). html (count); if ( count
Hepa Fliter Vacuum Cleaner,Filter Vacuum Cleaner,Multifunction Robot,Cleaner Automatic
NingBo CaiNiao Intelligent Technology Co., LTD , https://www.intelligentnewbot.com