由于石(shi)英晶体化学性能非(fei)常(chang)(chang)稳(wen)(wen)定(ding)，热膨胀系数非(fei)常(chang)(chang)小(xiao)，其振(zhen)(zhen)荡(dang)(dang)频率(lv)也非(fei)常(chang)(chang)稳(wen)(wen)定(ding)，由于控制几何尺(chi)寸可(ke)(ke)以(yi)(yi)做到很精密，因(yin)此，其谐(xie)(xie)振(zhen)(zhen)频率(lv)也很准确。根据石(shi)英晶体的机(ji)(ji)电(dian)(dian)(dian)(dian)(dian)(dian)效应(ying)，我们可(ke)(ke)以(yi)(yi)把它等(deng)效为一个电(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)振(zhen)(zhen)荡(dang)(dang)回(hui)(hui)(hui)路，即谐(xie)(xie)振(zhen)(zhen)回(hui)(hui)(hui)路。他们的机(ji)(ji)电(dian)(dian)(dian)(dian)(dian)(dian)效应(ying)是(shi)机(ji)(ji)-电(dian)(dian)(dian)(dian)(dian)(dian)-机(ji)(ji)-电(dian)(dian)(dian)(dian)(dian)(dian)的不断(duan)(duan)转换，由电(dian)(dian)(dian)(dian)(dian)(dian)感和电(dian)(dian)(dian)(dian)(dian)(dian)容组成的谐(xie)(xie)振(zhen)(zhen)回(hui)(hui)(hui)路是(shi)电(dian)(dian)(dian)(dian)(dian)(dian)场-磁(ci)场的不断(duan)(duan)转换。在电(dian)(dian)(dian)(dian)(dian)(dian)路中的应(ying)用(yong)实际(ji)上(shang)是(shi)把它当作一个高Q值的电(dian)(dian)(dian)(dian)(dian)(dian)磁(ci)谐(xie)(xie)振(zhen)(zhen)回(hui)(hui)(hui)路。由于石(shi)英晶体的损耗非(fei)常(chang)(chang)小(xiao)，即Q值非(fei)常(chang)(chang)高，做振(zhen)(zhen)荡(dang)(dang)器用(yong)时，可(ke)(ke)以(yi)(yi)产生非(fei)常(chang)(chang)稳(wen)(wen)定(ding)的振(zhen)(zhen)荡(dang)(dang)，作滤(lv)波器用(yong)，可(ke)(ke)以(yi)(yi)获(huo)得(de)非(fei)常(chang)(chang)稳(wen)(wen)定(ding)和陡削的带(dai)(dai)通或带(dai)(dai)阻(zu)曲线(xian)。线(xian)性稳(wen)(wen)压电(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)是(shi)比(bi)较早使用(yong)的一类直流(liu)稳(wen)(wen)压电(dian)(dian)(dian)(dian)(dian)(dian)源(yuan)，凯轩业(ye)电(dian)(dian)(dian)(dian)(dian)(dian)子科技有限(xian)公司。湖北原装(zhuang)声(sheng)表谐(xie)(xie)振(zhen)(zhen)器

品(pin)体振(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)荡器(qi)，简称品(pin)振(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)。在电(dian)(dian)气上它(ta)可以等(deng)效(xiao)(xiao)成(cheng)一个(ge)(ge)电(dian)(dian)容(rong)(rong)和一个(ge)(ge)电(dian)(dian)阻并(bing)联(lian)(lian)(lian)再串联(lian)(lian)(lian)一个(ge)(ge)电(dian)(dian)容(rong)(rong)的(de)(de)(de)二端网络(luo)，电(dian)(dian)工学上这个(ge)(ge)网络(luo)有(you)两个(ge)(ge)谐(xie)(xie)(xie)振(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)点，以频(pin)(pin)(pin)(pin)(pin)率(lv)(lv)的(de)(de)(de)高(gao)低分其中较(jiao)低的(de)(de)(de)频(pin)(pin)(pin)(pin)(pin)率(lv)(lv)是(shi)串联(lian)(lian)(lian)谐(xie)(xie)(xie)振(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)，较(jiao)高(gao)的(de)(de)(de)频(pin)(pin)(pin)(pin)(pin)率(lv)(lv)足并(bing)联(lian)(lian)(lian)谐(xie)(xie)(xie)振(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)。由于晶体自身的(de)(de)(de)特性致使(shi)这两个(ge)(ge)频(pin)(pin)(pin)(pin)(pin)率(lv)(lv)的(de)(de)(de)距离相(xiang)当的(de)(de)(de)接近，在这个(ge)(ge)极窄的(de)(de)(de)频(pin)(pin)(pin)(pin)(pin)率(lv)(lv)范围(wei)内，品(pin)振(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)等(deng)效(xiao)(xiao)为(wei)一个(ge)(ge)电(dian)(dian)感(gan)，所(suo)以只要品(pin)振(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)的(de)(de)(de)两端并(bing)联(lian)(lian)(lian)上合适的(de)(de)(de)电(dian)(dian)容(rong)(rong)它(ta)就(jiu)会组成(cheng)并(bing)联(lian)(lian)(lian)谐(xie)(xie)(xie)振(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)电(dian)(dian)路(lu)。这个(ge)(ge)并(bing)联(lian)(lian)(lian)谐(xie)(xie)(xie)振(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)电(dian)(dian)路(lu)加到一个(ge)(ge)负反馈电(dian)(dian)路(lu)中就(jiu)可以构成(cheng)正弦波振(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)荡电(dian)(dian)路(lu)，由于晶振(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)等(deng)效(xiao)(xiao)为(wei)电(dian)(dian)感(gan)的(de)(de)(de)频(pin)(pin)(pin)(pin)(pin)率(lv)(lv)范围(wei)很(hen)窄，所(suo)以即使(shi)其他元(yuan)件的(de)(de)(de)参数变(bian)化很(hen)大(da)，这个(ge)(ge)振(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)荡器(qi)的(de)(de)(de)频(pin)(pin)(pin)(pin)(pin)率(lv)(lv)也不(bu)会有(you)很(hen)大(da)的(de)(de)(de)变(bian)化。品(pin)振(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)有(you)一个(ge)(ge)重要的(de)(de)(de)参数，那就(jiu)是(shi)负载电(dian)(dian)容(rong)(rong)值(zhi)(zhi)，选择(ze)与负载电(dian)(dian)容(rong)(rong)值(zhi)(zhi)相(xiang)等(deng)的(de)(de)(de)并(bing)联(lian)(lian)(lian)电(dian)(dian)容(rong)(rong)，就(jiu)可以得(de)到晶振(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)标称的(de)(de)(de)谐(xie)(xie)(xie)振(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)频(pin)(pin)(pin)(pin)(pin)率(lv)(lv)。原装声(sheng)表谐(xie)(xie)(xie)振(zhen)(zhen)(zhen)(zhen)(zhen)(zhen)器(qi)的(de)(de)(de)作用深圳市凯轩(xuan)业电(dian)(dian)子科技有(you)限公(gong)司，欢迎(ying)咨询。

每个(ge)单片(pian)(pian)(pian)机系(xi)(xi)(xi)(xi)统(tong)里都有晶(jing)(jing)(jing)(jing)(jing)振(zhen)(zhen)，全程是叫晶(jing)(jing)(jing)(jing)(jing)体震(zhen)荡(dang)器，在(zai)单片(pian)(pian)(pian)机系(xi)(xi)(xi)(xi)统(tong)里晶(jing)(jing)(jing)(jing)(jing)振(zhen)(zhen)的(de)(de)作(zuo)用非常(chang)大(da)，他结合单片(pian)(pian)(pian)机内部的(de)(de)电(dian)路(lu)(lu)，产生单片(pian)(pian)(pian)机所必须的(de)(de)时(shi)钟(zhong)频(pin)(pin)率，单片(pian)(pian)(pian)机的(de)(de)一(yi)(yi)切(qie)指令的(de)(de)执行都是建立在(zai)这(zhei)个(ge)基础上的(de)(de)，晶(jing)(jing)(jing)(jing)(jing)振(zhen)(zhen)的(de)(de)提供(gong)的(de)(de)时(shi)钟(zhong)频(pin)(pin)率越(yue)高，那单片(pian)(pian)(pian)机的(de)(de)运行速度也(ye)就越(yue)快。晶(jing)(jing)(jing)(jing)(jing)振(zhen)(zhen)用一(yi)(yi)种能把电(dian)能和机械能相(xiang)互(hu)转化的(de)(de)晶(jing)(jing)(jing)(jing)(jing)体在(zai)共(gong)振(zhen)(zhen)的(de)(de)状态下工作(zuo)，以(yi)提供(gong)稳定(ding)，精确的(de)(de)单频(pin)(pin)振(zhen)(zhen)荡(dang)。在(zai)通常(chang)工作(zuo)条(tiao)件下，普通的(de)(de)晶(jing)(jing)(jing)(jing)(jing)振(zhen)(zhen)频(pin)(pin)率的(de)(de)精度可(ke)达(da)百万分之五十，高级的(de)(de)精度更(geng)高。有些晶(jing)(jing)(jing)(jing)(jing)振(zhen)(zhen)还可(ke)以(yi)由外加电(dian)压在(zai)一(yi)(yi)定(ding)范围内调(diao)整(zheng)频(pin)(pin)率，称为压控振(zhen)(zhen)荡(dang)器（VCO）。晶(jing)(jing)(jing)(jing)(jing)振(zhen)(zhen)系(xi)(xi)(xi)(xi)统(tong)提供(gong)基本的(de)(de)时(shi)钟(zhong)信(xin)号通常(chang)一(yi)(yi)个(ge)系(xi)(xi)(xi)(xi)统(tong)共(gong)用一(yi)(yi)个(ge)晶(jing)(jing)(jing)(jing)(jing)振(zhen)(zhen)，便于各部分保(bao)持同步(bu)(bu)，有些通讯系(xi)(xi)(xi)(xi)统(tong)的(de)(de)基频(pin)(pin)和射使用不同的(de)(de)晶(jing)(jing)(jing)(jing)(jing)振(zhen)(zhen)，而通过(guo)电(dian)子调(diao)整(zheng)频(pin)(pin)率的(de)(de)方法保(bao)持同步(bu)(bu)。晶(jing)(jing)(jing)(jing)(jing)振(zhen)(zhen)通常(chang)与(yu)锁相(xiang)环电(dian)路(lu)(lu)配(pei)合使用，以(yi)提供(gong)系(xi)(xi)(xi)(xi)统(tong)所需(xu)的(de)(de)时(shi)钟(zhong)频(pin)(pin)率。如果不同子系(xi)(xi)(xi)(xi)统(tong)需(xu)要不同频(pin)(pin)率的(de)(de)时(shi)钟(zhong)信(xin)号，可(ke)以(yi)用与(yu)同一(yi)(yi)个(ge)晶(jing)(jing)(jing)(jing)(jing)振(zhen)(zhen)相(xiang)连(lian)的(de)(de)不同锁相(xiang)环来提供(gong)。

1.无(wu)(wu)(wu)源品(pin)振(zhen)(zhen)(zhen)是(shi)(shi)有(you)(you) 2个引脚的(de)无(wu)(wu)(wu)极性元件需(xu)要借(jie)助于(yu)时钟电(dian)路(lu)(lu)才能产生振(zhen)(zhen)(zhen)荡信(xin)号(hao)，自身无(wu)(wu)(wu)法振(zhen)(zhen)(zhen)荡起来 无(wu)(wu)(wu)源晶(jing)(jing)振(zhen)(zhen)(zhen)需(xu)要用(yong)DSP 片内的(de)振(zhen)(zhen)(zhen)荡器，在 datasheet 上(shang)有(you)(you)建议(yi)(yi)的(de)连接方法。无(wu)(wu)(wu)源晶(jing)(jing)振(zhen)(zhen)(zhen)没有(you)(you)电(dian)压(ya)(ya)的(de)问题(ti)，信(xin)号(hao)电(dian)平是(shi)(shi)可(ke)(ke)变的(de)，也(ye)就是(shi)(shi)说是(shi)(shi)根(gen)据起振(zhen)(zhen)(zhen)电(dian)路(lu)(lu)来决定的(de)，同(tong)样的(de)晶(jing)(jing)振(zhen)(zhen)(zhen)可(ke)(ke)以适用(yong)于(yu)多种(zhong)(zhong)电(dian)压(ya)(ya)，可(ke)(ke)用(yong)于(yu)多种(zhong)(zhong)不同(tong)时钟信(xin)号(hao)电(dian)压(ya)(ya)要求的(de) DSP，而且价(jia)格通常也(ye)较低(di)，因此对于(yu)一般的(de)应(ying)用(yong)如果条件许可(ke)(ke)建议(yi)(yi)用(yong)晶(jing)(jing)体(ti)(ti)，这尤其适合于(yu)产品(pin)线(xian)丰富(fu)批量大的(de)生产者。无(wu)(wu)(wu)源晶(jing)(jing)振(zhen)(zhen)(zhen)相对于(yu)晶(jing)(jing)振(zhen)(zhen)(zhen)而言其缺(que)陷是(shi)(shi)信(xin)号(hao)质量较差，通常需(xu)要精确匹配外部电(dian)路(lu)(lu) (用(yong)于(yu)信(xin)号(hao)匹配的(de)电(dian)容、电(dian)感、电(dian)阻等(deng))，更换不同(tong)频率的(de)品(pin)体(ti)(ti)时周边配置电(dian)路(lu)(lu)需(xu)要做(zuo)相应(ying)的(de)调整(zheng)。使用(yong)时建议(yi)(yi)采用(yong)精度较高的(de)石英晶(jing)(jing)体(ti)(ti)，尽(jin)可(ke)(ke)能不要采用(yong)精度低(di)的(de)陶瓷晶(jing)(jing)体(ti)(ti)。声表谐振(zhen)(zhen)(zhen)器有(you)(you)需(xu)要的(de)咨询深圳(zhen)凯轩业电(dian)子科技(ji)有(you)(you)限公司，品(pin)质的(de)信(xin)赖之选。

晶(jing)(jing)(jing)振(zhen)(zhen)全称(cheng)为晶(jing)(jing)(jing)体振(zhen)(zhen)荡器，其作用(yong)在于(yu)产生(sheng)原(yuan)始(shi)的(de)时钟(zhong)频(pin)率(lv)(lv)(lv)，这(zhei)个(ge)频(pin)率(lv)(lv)(lv)晶(jing)(jing)(jing)振(zhen)(zhen)经过频(pin)率(lv)(lv)(lv)发(fa)生(sheng)器的(de)放大或(huo)缩(suo)小后就成(cheng)了电脑中各种不(bu)同(tong)的(de)总线频(pin)率(lv)(lv)(lv)。晶(jing)(jing)(jing)振(zhen)(zhen)一(yi)般叫(jiao)做晶(jing)(jing)(jing)体谐(xie)振(zhen)(zhen)器，是(shi)一(yi)种机(ji)电器件，是(shi)用(yong)电损耗很小的(de)石英晶(jing)(jing)(jing)体经精密(mi)切(qie)(qie)割磨削并镀(du)上(shang)电极焊上(shang)引线做成(cheng)。晶(jing)(jing)(jing)体有一(yi)个(ge)很重要(yao)的(de)特(te)性(xing)，如(ru)果(guo)给它(ta)(ta)通电，它(ta)(ta)就会(hui)产生(sheng)机(ji)械(xie)振(zhen)(zhen)荡，反之，如(ru)果(guo)给它(ta)(ta)机(ji)械(xie)力，它(ta)(ta)又会(hui)产生(sheng)电，这(zhei)种特(te)性(xing)叫(jiao)机(ji)电效应。他们有一(yi)个(ge)很重要(yao)的(de)特(te)点(dian)，其振(zhen)(zhen)荡频(pin)率(lv)(lv)(lv)与(yu)他们的(de)形状，材料，切(qie)(qie)割方向等密(mi)切(qie)(qie)相关。晶(jing)(jing)(jing)振(zhen)(zhen)通常与(yu)锁相环电路配(pei)合(he)使用(yong)，以(yi)提供系统(tong)所(suo)需(xu)的(de)时钟(zhong)频(pin)率(lv)(lv)(lv)。如(ru)果(guo)不(bu)同(tong)子(zi)系统(tong)需(xu)要(yao)不(bu)同(tong)频(pin)率(lv)(lv)(lv)的(de)时钟(zhong)信号(hao)，可以(yi)用(yong)与(yu)同(tong)一(yi)个(ge)晶(jing)(jing)(jing)振(zhen)(zhen)相连的(de)不(bu)同(tong)锁相环来提供。深圳(zhen)市凯轩业科技有限公司，声表谐(xie)振(zhen)(zhen)器信赖之选。安徽声表谐(xie)振(zhen)(zhen)器厂家

原装(zhuang)(zhuang)声(sheng)表谐振器(qi)选深圳(zhen)凯(kai)轩业(ye)电子有限(xian)公司。湖北原装(zhuang)(zhuang)声(sheng)表谐振器(qi)

通(tong)常厂(chang)家的(de)(de)(de)晶振(zhen)(zhen)(zhen)元件数据手册(ce)给(ji)出(chu)的(de)(de)(de)标称(cheng)频率(lv)不(bu)是(shi)Fr或FL，实(shi)际的(de)(de)(de)晶体(ti)(ti)(ti)(ti)元件应用于(yu)振(zhen)(zhen)(zhen)荡(dang)(dang)电(dian)(dian)(dian)(dian)路(lu)(lu)中时，它一般还会与(yu)负(fu)(fu)载(zai)电(dian)(dian)(dian)(dian)容(rong)相(xiang)联接，共同作用使晶体(ti)(ti)(ti)(ti)工作于(yu)Fr和FL之(zhi)间(jian)的(de)(de)(de)某个(ge)频率(lv)，这个(ge)频率(lv)由振(zhen)(zhen)(zhen)荡(dang)(dang)电(dian)(dian)(dian)(dian)路(lu)(lu)的(de)(de)(de)相(xiang)位(wei)和有(you)效电(dian)(dian)(dian)(dian)抗确定，通(tong)过(guo)改变电(dian)(dian)(dian)(dian)路(lu)(lu)的(de)(de)(de)电(dian)(dian)(dian)(dian)抗条件，就(jiu)可(ke)以在(zai)(zai)有(you)限的(de)(de)(de)范围(wei)内调(diao)(diao)节(jie)晶体(ti)(ti)(ti)(ti)频率(lv)。串(chuan)接的(de)(de)(de)小电(dian)(dian)(dian)(dian)容(rong)CL可(ke)以使石(shi)英(ying)晶体(ti)(ti)(ti)(ti)的(de)(de)(de)谐(xie)振(zhen)(zhen)(zhen)频率(lv)在(zai)(zai)一个(ge)小范围(wei)内调(diao)(diao)整当晶体(ti)(ti)(ti)(ti)元件与(yu)外部电(dian)(dian)(dian)(dian)容(rong)相(xiang)连接时（并(bing)联或串(chuan)联），在(zai)(zai)负(fu)(fu)载(zai)谐(xie)振(zhen)(zhen)(zhen)频率(lv)时的(de)(de)(de)电(dian)(dian)(dian)(dian)阻即为(wei)负(fu)(fu)载(zai)谐(xie)振(zhen)(zhen)(zhen)电(dian)(dian)(dian)(dian)阻RL，它总是(shi)大(da)于(yu)晶体(ti)(ti)(ti)(ti)元件本身的(de)(de)(de)谐(xie)振(zhen)(zhen)(zhen)电(dian)(dian)(dian)(dian)阻。晶体(ti)(ti)(ti)(ti)本身是(shi)不(bu)能产生振(zhen)(zhen)(zhen)荡(dang)(dang)信(xin)号的(de)(de)(de)，必(bi)须借(jie)助于(yu)相(xiang)应的(de)(de)(de)外部振(zhen)(zhen)(zhen)荡(dang)(dang)器(qi)电(dian)(dian)(dian)(dian)路(lu)(lu)才能实(shi)现(xian)，下图是(shi)一个(ge)串(chuan)联型(xing)振(zhen)(zhen)(zhen)荡(dang)(dang)器(qi)电(dian)(dian)(dian)(dian)路(lu)(lu)，其中，晶体(ti)(ti)(ti)(ti)管Q1、Q2构成的(de)(de)(de)两级放大(da)器(qi)，石(shi)英(ying)晶体(ti)(ti)(ti)(ti)X1与(yu)电(dian)(dian)(dian)(dian)容(rong)CL构成LC电(dian)(dian)(dian)(dian)路(lu)(lu)。在(zai)(zai)这个(ge)电(dian)(dian)(dian)(dian)路(lu)(lu)中，石(shi)英(ying)晶体(ti)(ti)(ti)(ti)相(xiang)当于(yu)一个(ge)电(dian)(dian)(dian)(dian)感，CL为(wei)可(ke)变电(dian)(dian)(dian)(dian)容(rong)器(qi)，调(diao)(diao)节(jie)其容(rong)量即可(ke)使电(dian)(dian)(dian)(dian)路(lu)(lu)进入谐(xie)振(zhen)(zhen)(zhen)状(zhuang)态，输出(chu)波形(xing)为(wei)方波。湖北原装声表谐(xie)振(zhen)(zhen)(zhen)器(qi)

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