溫補振蕩器適用范圍

溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)(du)補(bu)償(chang)晶(jing)(jing)(jing)體振蕩(dang)(dang)器(qi)低(di)(di)溫(wen)(wen)(wen)(wen)(wen)(wen)范圍的(de)(de)(de)(de)實現(xian)方(fang)法(fa)及裝(zhuang)置，所(suo)述方(fang)法(fa)包括(kuo)采用溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)(du)傳(chuan)感器(qi)檢(jian)測所(suo)述溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)(du)補(bu)償(chang)晶(jing)(jing)(jing)體振蕩(dang)(dang)器(qi)的(de)(de)(de)(de)溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)(du)并根據所(suo)述溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)(du)調(diao)節發(fa)熱(re)件(jian)發(fa)熱(re)實現(xian)擴展所(suo)述溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)(du)補(bu)償(chang)晶(jing)(jing)(jing)體振蕩(dang)(dang)器(qi)工(gong)作的(de)(de)(de)(de)低(di)(di)溫(wen)(wen)(wen)(wen)(wen)(wen)范圍，同時(shi)實施(shi)保(bao)(bao)溫(wen)(wen)(wen)(wen)(wen)(wen)措施(shi).本發(fa)明通過使用溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)(du)傳(chuan)感器(qi)采集溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)(du)根據溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)(du)調(diao)節發(fa)熱(re)件(jian)局部(bu)加(jia)熱(re)實現(xian)對溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)(du)補(bu)償(chang)晶(jing)(jing)(jing)體振蕩(dang)(dang)器(qi)的(de)(de)(de)(de)工(gong)作環境溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)(du)擴展，并采取(qu)保(bao)(bao)溫(wen)(wen)(wen)(wen)(wen)(wen)措施(shi)，在﹣55℃~40℃環境溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)(du)下，使溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)(du)補(bu)償(chang)晶(jing)(jing)(jing)體振蕩(dang)(dang)器(qi)的(de)(de)(de)(de)局部(bu)溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)(du)仍然能(neng)(neng)保(bao)(bao)持(chi)40℃以上，克(ke)服了普通溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)(du)補(bu)償(chang)晶(jing)(jing)(jing)體振蕩(dang)(dang)器(qi)低(di)(di)于40℃時(shi)性(xing)能(neng)(neng)指(zhi)標急劇(ju)惡化(hua)的(de)(de)(de)(de)缺點，保(bao)(bao)證了﹣55℃~40℃環境溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)(du)下溫(wen)(wen)(wen)(wen)(wen)(wen)度(du)(du)(du)(du)(du)補(bu)償(chang)晶(jing)(jing)(jing)體振蕩(dang)(dang)器(qi)的(de)(de)(de)(de)性(xing)能(neng)(neng)指(zhi)標，同時(shi)具有功耗低(di)(di)，溫(wen)(wen)(wen)(wen)(wen)(wen)補(bu)振蕩(dang)(dang)器(qi)生產廠(chang)家，體積小，成(cheng)本低(di)(di)，溫(wen)(wen)(wen)(wen)(wen)(wen)補(bu)振蕩(dang)(dang)器(qi)價格，穩定性(xing)好等(deng)特(te)點.

什(shen)么(me)叫晶(jing)振(zhen)的微調(diao)效(xiao)應

微(wei)調效(xiao)應：由(you)于頻(pin)率(lv)(lv)調整而產生(sheng)的頻(pin)率(lv)(lv)溫度特(te)性變化的效(xiao)應。微(wei)調效(xiao)應一般附在頻(pin)率(lv)(lv)溫度穩(wen)定(ding)度后，以其(qi)他附加條件(jian)出現。

例如(ru)，壓控(kong)溫補(bu)(bu)晶(jing)體(ti)振蕩器會這樣(yang)規定(ding)“頻率(lv)溫度(du)(du)(du)(du)穩(wen)定(ding)度(du)(du)(du)(du)：≤±2.0ppm -55℃～+85℃（在壓控(kong)電(dian)壓使用范圍的任何(he)值(zhi)時，均保證(zheng)頻率(lv)溫度(du)(du)(du)(du)穩(wen)定(ding)度(du)(du)(du)(du)指標(biao)）”，括號內的附(fu)加條件就是(shi)微調(diao)效應(ying)指標(biao)，溫補(bu)(bu)振蕩器加工，這種(zhong)附(fu)加微調(diao)效應(ying)后的頻率(lv)溫度(du)(du)(du)(du)穩(wen)定(ding)度(du)(du)(du)(du)較(jiao)獨立(li)的頻率(lv)溫度(du)(du)(du)(du)穩(wen)定(ding)度(du)(du)(du)(du)難度(du)(du)(du)(du)增加許多。

晶體振蕩器頻(pin)率控制方法(fa)

振(zhen)(zhen)(zhen)蕩(dang)器(qi)可(ke)(ke)通過(guo)直接(jie)牽(qian)引(yin)(yin)(yin)頻(pin)(pin)率(lv)(lv)(lv)或使用高分辨率(lv)(lv)(lv)鎖相環(huan)調(diao)整頻(pin)(pin)率(lv)(lv)(lv)來實現頻(pin)(pin)率(lv)(lv)(lv)控制。直接(jie)牽(qian)引(yin)(yin)(yin)頻(pin)(pin)率(lv)(lv)(lv)的 VCXO用調(diao)整變(bian)容二極管電壓來改變(bian)諧(xie)振(zhen)(zhen)(zhen)電路電容，溫補振(zhen)(zhen)(zhen)蕩(dang)器(qi)，而直接(jie)牽(qian)引(yin)(yin)(yin)頻(pin)(pin)率(lv)(lv)(lv)的DCXO通過(guo)可(ke)(ke)編程開關切換不同的諧(xie)振(zhen)(zhen)(zhen)電容。使用石英晶體(ti)諧(xie)振(zhen)(zhen)(zhen)器(qi)的VCXO直接(jie)牽(qian)引(yin)(yin)(yin)頻(pin)(pin) 率(lv)(lv)(lv)調(diao)整可(ke)(ke)以保(bao)持低相位(wei)噪聲，但牽(qian)引(yin)(yin)(yin)范(fan)(fan)圍(wei)被限制在約±200ppm。當系統應用需要更(geng)寬的頻(pin)(pin)率(lv)(lv)(lv)牽(qian)引(yin)(yin)(yin)范(fan)(fan)圍(wei)和與晶體(ti)振(zhen)(zhen)(zhen)蕩(dang)器(qi)相近的低噪聲特性時(shi)，用戶(hu)更(geng)傾向于選(xuan)擇 基于鎖相環(huan)的MEMS控制振(zhen)(zhen)(zhen)蕩(dang)器(qi)架構，因為它(ta)們(men)可(ke)(ke)以提供(gong)高達±1600ppm的牽(qian)引(yin)(yin)(yin)范(fan)(fan)圍(wei)。