- Blog>
- What are the Differences Between VCC, VEE, VDD, and VSS?
by: PCBWay Jan 23,2024 19107 Views 0 Comments Posted in Technology
VCC VEE VDD VSS
The terms VCC, VEE, VDD, and VSS are used in relation to power supply voltages. Here are their meanings and differences.
VCC
• VCC is used as the positive supply voltage for circuits using Bipolar Junction Transistors (BJT).
• The "C" in "VCC" stands for Collector.
• It is commonly believed that the repetition of "C" twice in "VCC" is to distinguish it from the collector voltage (VC).
On the collector side of an NPN-type bipolar junction transistor (BJT), the positive supply voltage is referred to as "VCC." The collector of an NPN-type BJT is typically directly connected to VCC or connected to VCC through resistors or other means.
Circuits utilizing multiple positive supply voltages are often represented by different supply voltage labels such as "VCC1, VCC2, ...".
VCC is also employed as the positive supply voltage for operational amplifiers, where the internal circuitry primarily consists of bipolar junction transistors, and for Transistor-Transistor Logic (TTL).
Additional clarification:
"V+" and "V-" are also indicative of power supply voltages.
Therefore, when referring to the positive supply voltage in circuits using bipolar junction transistors (BJTs), "V+" can be used interchangeably with "VCC."
VEE
• VEE is utilized as the negative supply voltage for circuits using Bipolar Junction Transistors (BJT).
• The "E" in "VEE" stands for Emitter.
• It is commonly believed that the repetition of "E" twice in "VEE" is to distinguish it from the emitter voltage (VE).
The negative supply voltage on the emitter side of an NPN-type Bipolar Junction Transistor (BJT) is referred to as "VEE." The emitter of an NPN-type BJT is typically directly connected to VEE or connected to VEE through resistors or other means. In a single power supply system, "VEE" shares the same potential as ground.
Circuits utilizing multiple negative supply voltages are often represented by different supply voltage labels such as "VEE1, VEE2, ...".
VEE is also employed as the negative supply voltage for operational amplifiers, where the internal circuitry primarily consists of bipolar junction transistors, and for Transistor-Transistor Logic (TTL).
Additional clarification:
"V+" and "V-" are also indicative of power supply voltages.
Therefore, when referring to the negative supply voltage in circuits using bipolar junction transistors (BJTs), "V-" can be used interchangeably with "VEE."
The difference between VCC and VEE is illustrated in the following diagram:
VDD
• VDD is used as the positive supply voltage for circuits using Field-Effect Transistors (FET).
• The "D" in "VDD" stands for Drain.
• It is commonly believed that the repetition of "D" twice in "VDD" is to distinguish it from the drain voltage (VD).
On the drain side of an N-channel Field-Effect Transistor (NchFET), the positive supply voltage is referred to as "VDD." The drain of an NchFET is typically directly connected to VDD or connected to VDD through resistors or other means.
In circuits with multiple positive supply voltages, they are often represented by different labels such as "VDD1, VDD2, ...".
VDD is also used as the positive supply voltage for operational amplifiers, where the internal circuitry primarily consists of field-effect transistors, and for Complementary Metal-Oxide-Semiconductor (CMOS).
Additional clarification:
"V+" and "V-" are also indicative of power supply voltages.
Therefore, when referring to the positive supply voltage in circuits using field-effect transistors (FETs), "V+" can be used interchangeably with "VDD."
VSS
• VSS is utilized as the negative supply voltage for circuits using Field-Effect Transistors (FET).
• The "S" in "VSS" stands for Source.
• It is commonly believed that the repetition of "S" twice in "VSS" is to distinguish it from the source voltage (VS).
On the source side of an N-channel Field-Effect Transistor (NchFET), the negative supply voltage is referred to as "VSS." The source of an NchFET is typically directly connected to VSS or connected to VSS through resistors or other means. In a single power supply system, "VSS" shares the same potential as ground.
Circuits utilizing multiple negative supply voltages are often represented by different supply voltage labels such as "VSS1, VSS2, ...".
VSS is also used as the negative supply voltage for operational amplifiers, where the internal circuitry primarily consists of field-effect transistors, and for Complementary Metal-Oxide-Semiconductor (CMOS).
Additional clarification:
"V+" and "V-" are also indicative of power supply voltages.
Therefore, when referring to the negative supply voltage in circuits using field-effect transistors (FETs), "V-" can be used interchangeably with "VSS."
The difference between VDD and VSS is illustrated in the following diagram:
Join us
Wanna be a dedicated PCBWay writer? We definately look forward to having you with us.
Submit for Publication Become Our Writer
Leave a Comment (0)
- Previous：Ovrdrive USB
- Next：Meet the Winners of Christmas 2023 Projects
Related articles
- What are the Differences Between VCC, VEE, VDD, and VSS?
- Comments(0)
You can only upload 1 files in total. Each file cannot exceed 2MB. Supports JPG, JPEG, GIF, PNG, BMP
0 / 10000
'; html += '
'; html += '
'; html += ' '; html += ''; html += '
'; $('#div-three-' + id).children('div').append(html).show(); } }, //取消添加留言 fn_cancel_msg: function (obj) { $(obj).parents('.js-son-comments').hide(); }, //删除自己的留言 fn_del_msg: function (level, id) { layer.confirm($('#JsA10').val(), function (index) { $.getJSON(commentObj.fn_del_comment_url(), { msgid: id }, function (res) { if (res.result) { if (level == 1) { //if (ispage > 0) // window.location.reload(); $('#li' + id).remove(); commentObj.fn_up_level_msg_cnt(level, id, -1); } else { var obj = $('#' + (level == 1 ? 'li' : 'div-three-') + id); var num = parseInt(obj.parents('li').find('b').text()); num += -1; if (num < 0) { num = 0; } var parobj = $('#div-three-' + id).parent(); obj.parents('li').find('b').text(num); $('#div-three-' + id).remove(); if (parobj.find('.sub-comment').length > 0) { } else { parobj.parent().hide(); } } commentObj.fn_up_msg_cnt(-1); layer.close(index); } else if (res.msg == "nothing") { layer.alert("error"); return; } else if (res.msg == "havereply") { layer.alert($('#JsA11').val()); return; } else { layer.alert($('#JsA12').val()); return; } }); }) }, //更新留言数量 fn_up_msg_cnt: function (val) { var num = parseInt($('#MsgCount').text()); num += parseInt(val); if (num < 0) { num = 0; } $('#MsgCount').text(num); }, //更新留言数量level fn_up_level_msg_cnt: function (level, id, val) { var obj = $('#' + (level == 1 ? 'li' : 'div-three-') + id); var num = parseInt(obj.parents('li').find('b').text()); num += parseInt(val); if (num < 0) { num = 0; } obj.parents('li').find('b').text(num); }, fn_mark_comment: function (obj, islike, commentid) { if (logintype != 1) { layerLogin(); return; } $.getJSON($('#memberurl').val() + '/Project/CommentMark?callback=?', { id: commentObj.obj_id, ProjectType: commentObj.obj_type, isLike: islike, commentid: commentid }, function (res) { if (res.result) { var markCnt = parseInt($('#commentMarkCnt' + commentid).text()); if ($(obj).hasClass('active')) { $(obj).removeClass('active'); if (islike) { $('#commentMarkCnt' + commentid).text(markCnt - 1); } else { $('#commentMarkCnt' + commentid).text(markCnt + 1); } } else { if ($(obj).parent().find('dl').hasClass('active')) { if (islike) { $('#commentMarkCnt' + commentid).text(markCnt + 2); } else { $('#commentMarkCnt' + commentid).text(markCnt - 2); } $(obj).parent().find('dl').removeClass('active'); } else { if (islike) { $('#commentMarkCnt' + commentid).text(markCnt + 1); } else { $('#commentMarkCnt' + commentid).text(markCnt - 1); } } $(obj).addClass('active'); } } else if (res.msg == "nologin") { //弹出登录框 layerLogin(); } else layer.alert("error"); }); }, //加载数据 fn_load_data: function (page) { $('#commentload').show(); $.ajax({ url: commentObj.fn_get_comment_url(), dataType: 'jsonp', data: { objid: commentObj.obj_id, objtype: commentObj.obj_type, page: page }, success: function (jason) { var totalpage = jason.TotalCount / 20; if (totalpage % 1 > 0) totalpage = parseInt(totalpage) + 1; if (page >= totalpage) { $('#commentviewmore').parent().remove(); } else { $('#commentviewmore').parent().show(); } if (jason.TotalCount > 0) { page = jason.PageIndex; var msgList = jason.DataList; var html = ''; if (msgList && msgList.length > 0) { for (var item in msgList) { html += '
'; html += '
- '; html += ''; html += '
- ' + msgList[item].MarkCnt + ' '; html += '
'; html += '
- '; html += ''; html += '
' + (msgList[item].MbId > 0 ? msgList[item].ContactName : msgList[item].Name == "" ? msgList[item].Email : msgList[item].Name) + '
' + (msgList[item].MbId > 0 ? msgList[item].ContactName : msgList[item].Name == "" ? msgList[item].Email : msgList[item].Name) + '
'; if (msgList[item].MsgPic && msgList[item].MsgPic != '') { html += '
' html += '
' html += "![What are the Differences Between VCC, VEE, VDD, and VSS? - Technology - PCBway (9)](https://i0.wp.com/www.pcbway.com/" "What are the Differences Between VCC, VEE, VDD, and VSS? - Technology - PCBway (9)")
"; html += '
'; html += '
'; } html += msgList[item].Note; html += '
'; html += '' + msgList[item].EnAddTime + ''; html += '' + (msgList[item].ReplyList ? msgList[item].ReplyList.length : 0) + ' ' + $('#JsA1').val() + ''; html += '
'; // html += ''; html += '
'; var ReplyList = msgList[item].ReplyList; if (ReplyList && ReplyList.length > 0) { for (var reply in ReplyList) { html += '
'; html += '
'; html += '
'; html += '' + ReplyList[reply].ContactName + ' '; html += '' + ReplyList[reply].AddTimeStr + ''; html += ''; html += '' + $('#JsA13').val() + ''; if (ReplyList[reply].IsMy && ((new Date() - new Date(ReplyList[reply].AddTime)) / (1000 * 60 * 60)) <= 5 && (!ReplyList[reply].ReplyList || ReplyList[reply].ReplyList.length == 0)) { html += ' ' + $('#JsA14').val() + ''; } html += ''; html += '
'; html += '
'; if (ReplyList[reply].ReplyCommentId > 0 && ReplyList[reply].ReplyCommentId != msgList[item].Id) { html += '
'; html += $('#JsA13').val() + '@ ' + ReplyList[reply].ReplyContactName + '：'; html += '
'; } html += '
' + ReplyList[reply].Note + '
'; html += '
'; html += '
'; html += '
'; } } html += '
'; if (msgList[item].ReplyList && msgList[item].ReplyList.length > 0) { html += '
'; } html += '
'; if (msgList[item].MbId > 0) { html += '' + $('#JsA13').val() + ''; } //
if (msgList[item].IsMy && ((new Date() - new Date(msgList[item].AddTime)) / (1000 * 60 * 60)) <= 5 && (!msgList[item].ReplyList || msgList[item].ReplyList.Count == 0)) { html += ' ' + $('#JsA14').val() + ''; } html += '
'; } $('#commentload').hide(); $('#comment_ul').append(html); } } $('#commentload').hide(); }, error: function (xhr, status, error) { $('#commentload').hide(); } }); }, //保存数据 fn_save_msg: function (level, id) { var msg = $('#msg-' + id).val(); var msgpic = ''; if (level == 1) { msgpic = $('#msgPic').val(); } if (msg && msg.length > 10000) { $('#msg-' + id).addClass('form-error'); return false; } if ((msg && msg.length > 0) || msgpic.length > 4) { $('body').addClass('global-loading'); $.ajax({ url: commentObj.fn_save_comment_url(), //dataType: 'jsonp', type: 'POST', data: { msg: msg, replyid: id, objid: commentObj.obj_id, msgpic: msgpic, objtype: commentObj.obj_type, isproject: commentObj.is_project }, crossDomain: true, xhrFields: { withCredentials: true }, success: function (res) { if (res.result) { //if (ispage > 0) { // window.location.reload(); // return; //} //js加载，不刷新页面，增强体验 $('#msg-' + id).val(""); if (level == 1) { $('.js-add-comment .js-words').css({ 'color': '#999' }).text(0); } else { $('#msg-' + id).next().find('.js-words').css({ 'color': '#999' }).text(0); } if (level == 1) { $('#msgPic').val(''); $('#msgPic').parent().find('img').remove(); $('#removeMsgPic').hide(); //第一级留言（直接回复文章） var objtype = parseInt($('#hidobjtype').val()); var html = '
'; html += '
- '; html += ''; html += '
- 0 '; html += '
'; html += '
- '; html += ''; html += '
' + commentObj.fn_get_username(res.msg.ContactName) + '
' + commentObj.fn_get_username(res.msg.ContactName) + '
'; if (res.msg.MsgPic && res.msg.MsgPic != '') { html += '
' html += '
' html += ""; html += '
'; html += '
'; } html += res.msg.Note; html += '
'; html += '' + res.msg.EnAddTime + ''; html += ' 0 ' + $('#JsA1').val() + ''; html += '
'; html += ''; html += ''; html += '' + $('#JsA13').val() + ' '; html += '' + $('#JsA14').val() + ''; html += '
'; html += ''; $('#comment_ul').prepend(html); commentObj.fn_up_msg_cnt(1); //commentObj.fn_up_level_msg_cnt(1, res.msg.Id, 1); //if (ispage == 0) // $("html,body").animate({ scrollTop: $("#li" + res.msg.Id).offset().top - 70 }, 1000); } else { //第二级留言（回复第一级留言） var html = '
'; html += '
'; html += '
'; html += '' + commentObj.fn_get_username(res.msg.ContactName); html += ''; html += ' ' + res.msg.AddTimeStr; html += ''; html += ''; html += '' + $('#JsA13').val() + ' '; html += '' + $('#JsA14').val() + ''; html += ''; html += '
'; html += '
'; if (level == 3) { //第三级留言（回复第二级留言） html += '
'; html += $('#JsA13').val() + '@ ' + commentObj.fn_get_username(res.msg.ReplyContactName) + '：'; html += '
'; } html += '
' + res.msg.Note + '
'; html += '
'; html += '
'; html += '
'; if (level == 3) { //第三级留言（回复第二级留言） commentObj.fn_add_reply(3, id); $('#div-three-' + id).parent('div').append(html); } else { commentObj.fn_add_reply(2, id); $('#div-two-' + id).show().children('div').append(html); } commentObj.fn_up_msg_cnt(1); commentObj.fn_up_level_msg_cnt(level, res.msg.Id, 1); } } else if (res.msg == "nologin") { //弹出登录框 layerLogin(); } else { layer.alert("error"); } $('body').removeClass('global-loading'); }, error: function (xhr, status, error) { $('body').removeClass('global-loading'); } }); } else { $('#msg-' + id).addClass('form-error'); if (!$('#msg-' + id).hasClass('js-mention')) $('.error-tips').show().Shake(4, 10); return false; } }, //上传文件 fn_uploader: function () { /*上传文件开始*/ var uploader = WebUploader.create({ // 选完文件后，是否自动上传。 auto: true, // swf文件路径 swf: '/img/js/jqueryplus/webuploader-0.1.5/Uploader.swf', // 文件接收服务端。 server: '/Common/UpFile', // 选择文件的按钮。可选。 // 内部根据当前运行是创建，可能是input元素，也可能是flash. pick: { id: '#msgFile', multiple: false }, fileVal: 'FileData', //fileNumLimit: 1, fileSingleSizeLimit: '5242880',//'10485760', accept: { title: 'File', extensions: 'bmp,png,gif,jpg,jpeg', mimeTypes: 'image/*' }, 'formData': { 'uptype': "blogfile", 'key': "", 'checkcode': "", "getjson": true }, }); uploader.on('uploadStart', function (file, percentage) { if (logintype != 1) { layerLogin(); return; } $('#sfile').before('
'); $('#sfile').html('Uploading(0%)'); }); uploader.on('uploadProgress', function (file, percentage) { $('#sfile').html('Uploading(' + parseInt(percentage * 100) + '%)'); }); uploader.on('uploadSuccess', function (file, data) { $('#sfile').html(''); $('#msgPic').parent().find('img').remove(); $('#msgPic').before('
'); $('#msgPic').val(data.url); $('#msgPic').next().show(); $('.error-tips').hide(); }); uploader.on('error', function (str) { if (str == "F_EXCEED_SIZE") { alert($('#JsA9').val()) } }); $('#removeMsgPic').click(function () { $('#msgPic').val(''); $('#msgPic').parent().find('img').remove(); $(this).hide(); uploader.reset(); }); /*上传文件结束*/ } } commentObj.fn_init();
