溫補振蕩器的作用

用(yong)溫(wen)(wen)度(du)補(bu)償(chang)的(de)方(fang)法減少頻(pin)(pin)(pin)率(lv)失(shi)真，因為振(zhen)蕩器(qi)工作時(shi)由(you)于電(dian)阻的(de)作用(yong)(晶體管或(huo)者集成電(dian)路都有(you)內阻)就會有(you)溫(wen)(wen)升，溫(wen)(wen)度(du)升高(gao)對半(ban)導(dao)體影響(xiang)很大，會使半(ban)導(dao)體的(de)工作點發生(sheng)飄移從而(er)導(dao)致振(zhen)蕩頻(pin)(pin)(pin)率(lv)的(de)變化，這(zhe)些(xie)變化對使用(yong)者來說(shuo)影響(xiang)很大如無線(xian)電(dian)通訊、本地時(shi)鐘(單片機或(huo)者電(dian)腦)要求頻(pin)(pin)(pin)率(lv)高(gao)度(du)穩(wen)(wen)定(ding)(ding)，所以開發商生(sheng)產出具有(you)溫(wen)(wen)度(du)補(bu)償(chang)性能的(de)有(you)源振(zhen)蕩器(qi)，這(zhe)些(xie)具有(you)溫(wen)(wen)度(du)補(bu)償(chang)的(de)晶體振(zhen)蕩器(qi)頻(pin)(pin)(pin)率(lv)變化非常(chang)低，溫(wen)(wen)補(bu)振(zhen)蕩器(qi)報價(jia)，可以長(chang)期穩(wen)(wen)定(ding)(ding)工作提供高(gao)穩(wen)(wen)定(ding)(ding)性頻(pin)(pin)(pin)率(lv)基準。

溫補振蕩(dang)器中直接補償類(lei)型

直(zhi)(zhi)接補(bu)償(chang)型(xing) 直(zhi)(zhi)接補(bu)償(chang)型(xing)TCXO是由熱敏電(dian)阻(zu)和(he)(he)阻(zu)容(rong)元件組(zu)成(cheng)的溫(wen)度補(bu)償(chang)電(dian)路，溫(wen)補(bu)振(zhen)(zhen)(zhen)蕩(dang)器現貨，在振(zhen)(zhen)(zhen)蕩(dang)器中與石英水晶振(zhen)(zhen)(zhen)子(zi)串(chuan)聯而成(cheng)的。在溫(wen)度變(bian)化時(shi)，熱敏電(dian)阻(zu)的阻(zu)值(zhi)和(he)(he)晶體等效串(chuan)聯電(dian)容(rong)容(rong)值(zhi)相應變(bian)化，從而抵消或削減振(zhen)(zhen)(zhen)蕩(dang)頻率的溫(wen)度漂移。該補(bu)償(chang)方式電(dian)路簡單，成(cheng)本較低(di)，節省印(yin)制電(dian)路板(PCB)尺寸和(he)(he)空間，適用(yong)于小型(xing)和(he)(he)低(di)壓小電(dian)流場(chang)合。但(dan)當要求晶體振(zhen)(zhen)(zhen)蕩(dang)器精度小于±1pmm時(shi)，溫(wen)補(bu)振(zhen)(zhen)(zhen)蕩(dang)器，直(zhi)(zhi)接補(bu)償(chang)方式并(bing)不適宜。

溫補振蕩器包括哪些

溫(wen)(wen)度(du)(du)(du)補(bu)償型(xing)晶(jing)體(ti)(ti)振(zhen)蕩(dang)器，包括:一溫(wen)(wen)度(du)(du)(du)傳(chuan)感(gan)器(11);一模擬型(xing)溫(wen)(wen)度(du)(du)(du)補(bu)償器(12);一數(shu)字型(xing)溫(wen)(wen)度(du)(du)(du)補(bu)償器(13);一加法器電(dian)(dian)(dian)(dian)路(lu)(lu)(14);以(yi)及一電(dian)(dian)(dian)(dian)壓(ya)(ya)控制的(de)(de)(de)(de)(de)晶(jing)體(ti)(ti)振(zhen)蕩(dang)電(dian)(dian)(dian)(dian)路(lu)(lu)(3).模擬型(xing)溫(wen)(wen)度(du)(du)(du)補(bu)償器(12)和數(shu)字型(xing)溫(wen)(wen)度(du)(du)(du)補(bu)償器(13)分別響應于它們相應于溫(wen)(wen)度(du)(du)(du)傳(chuan)感(gan)器(11)檢測的(de)(de)(de)(de)(de)溫(wen)(wen)度(du)(du)(du)的(de)(de)(de)(de)(de)輸入電(dian)(dian)(dian)(dian)壓(ya)(ya)產生溫(wen)(wen)度(du)(du)(du)補(bu)償電(dian)(dian)(dian)(dian)壓(ya)(ya).所述兩個溫(wen)(wen)度(du)(du)(du)補(bu)償電(dian)(dian)(dian)(dian)壓(ya)(ya)通過(guo)加法器電(dian)(dian)(dian)(dian)路(lu)(lu)(14)組合.組合后的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)壓(ya)(ya)被施加給電(dian)(dian)(dian)(dian)壓(ya)(ya)控制的(de)(de)(de)(de)(de)晶(jing)體(ti)(ti)振(zhen)蕩(dang)電(dian)(dian)(dian)(dian)路(lu)(lu)(3)的(de)(de)(de)(de)(de)電(dian)(dian)(dian)(dian)壓(ya)(ya)控制端，借以(yi)利用晶(jing)體(ti)(ti)諧振(zhen)器(4)的(de)(de)(de)(de)(de)溫(wen)(wen)度(du)(du)(du)補(bu)償穩定電(dian)(dian)(dian)(dian)壓(ya)(ya)控制的(de)(de)(de)(de)(de)晶(jing)體(ti)(ti)振(zhen)蕩(dang)電(dian)(dian)(dian)(dian)路(lu)(lu)(3)的(de)(de)(de)(de)(de)振(zhen)蕩(dang)頻率(lv).