VCO的關(guan)鍵(jian)性能參數是調諧電壓、頻率范圍、本(ben)底(di)噪(zao)聲(sheng)、相位(wei)噪(zao)聲(sheng)、輸出功率、諧波(bo)和(he)負載阻抗。其次要性能參數包括電源電壓、電源電流、調諧靈(ling)敏度、推頻、牽引、調諧端(duan)口電容和(he)機械事(shi)項。調諧靈(ling)敏度用(yong)于說明(ming)調諧電壓（MHz/V）變(bian)(bian)化(hua)引起的輸出頻率變(bian)(bian)化(hua)。

值得注意的(de)(de)(de)是輸(shu)(shu)出功(gong)率和諧波功(gong)率與(yu)(yu)(yu)輸(shu)(shu)入(ru)直流(liu)功(gong)率和調諧電(dian)(dian)(dian)(dian)壓之(zhi)間存(cun)在關系(xi)(xi)，但是不(bu)一定存(cun)在線性關系(xi)(xi)。就大(da)多數帶模擬電(dian)(dian)(dian)(dian)壓輸(shu)(shu)入(ru)設(she)計的(de)(de)(de)VCO而言，其輸(shu)(shu)出頻(pin)(pin)率與(yu)(yu)(yu)調諧電(dian)(dian)(dian)(dian)壓之(zhi)間存(cun)在大(da)致線性關系(xi)(xi)，但這并未考慮輸(shu)(shu)入(ru)電(dian)(dian)(dian)(dian)壓、輸(shu)(shu)入(ru)電(dian)(dian)(dian)(dian)流(liu)、負載和調諧電(dian)(dian)(dian)(dian)壓對輸(shu)(shu)出功(gong)率和頻(pin)(pin)率特性的(de)(de)(de)綜合影(ying)響。這些(xie)影(ying)響可以采用推頻(pin)(pin)（VCO頻(pin)(pin)率變化與(yu)(yu)(yu)電(dian)(dian)(dian)(dian)源電(dian)(dian)(dian)(dian)壓的(de)(de)(de)關系(xi)(xi)）和牽引（VCO頻(pin)(pin)率變化與(yu)(yu)(yu)輸(shu)(shu)出負載的(de)(de)(de)關系(xi)(xi)）進(jin)行(xing)說明。

發射壓控振蕩的作用

壓(ya)控振(zhen)(zhen)蕩器(qi)(VCO)與普(pu)通本振(zhen)(zhen)相比(bi)，在諧振(zhen)(zhen)回(hui)路中(zhong)多出了電(dian)控器(qi)件(jian)，比(bi)如變容二極管(guan)；一般壓(ya)控振(zhen)(zhen)蕩器(qi)(VCO)多以克(ke)拉(la)潑振(zhen)(zhen)蕩器(qi)形式(shi)存在，以保證電(dian)路工作點(dian)和Q值的(de)穩定性(xing)。

振(zhen)(zhen)蕩(dang)(dang)器(qi)(qi)自其誕生(sheng)(sheng)以來(lai)就(jiu)一直在(zai)通(tong)(tong)信、電(dian)(dian)(dian)(dian)(dian)(dian)子(zi)、航(hang)海航(hang)空航(hang)天及醫學等(deng)領域扮演重要的(de)(de)角色，具有廣泛(fan)的(de)(de)用(yong)(yong)(yong)途(tu)。在(zai)無線(xian)電(dian)(dian)(dian)(dian)(dian)(dian)技術(shu)發展(zhan)的(de)(de)初期，七專級壓(ya)控振(zhen)(zhen)蕩(dang)(dang)器(qi)(qi)加(jia)(jia)工(gong)，它就(jiu)在(zai)發射(she)機(ji)中用(yong)(yong)(yong)來(lai)產生(sheng)(sheng)高(gao)頻(pin)(pin)載(zai)波電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)，在(zai)超外(wai)差接收機(ji)中用(yong)(yong)(yong)作本(ben)機(ji)振(zhen)(zhen)蕩(dang)(dang)器(qi)(qi)，成為(wei)發射(she)和(he)接收設備的(de)(de)基(ji)本(ben)部件。隨著電(dian)(dian)(dian)(dian)(dian)(dian)子(zi)技術(shu)的(de)(de)迅速發展(zhan)，振(zhen)(zhen)蕩(dang)(dang)器(qi)(qi)的(de)(de)用(yong)(yong)(yong)途(tu)也越(yue)來(lai)越(yue)廣泛(fan)，例(li)如在(zai)無線(xian)電(dian)(dian)(dian)(dian)(dian)(dian)測量儀(yi)器(qi)(qi)中，它產生(sheng)(sheng)各(ge)種(zhong)頻(pin)(pin)段的(de)(de)正弦信號電(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)：在(zai)熱(re)加(jia)(jia)工(gong)、熱(re)處理、超聲波加(jia)(jia)工(gong)中，它產生(sheng)(sheng)大功(gong)率的(de)(de)高(gao)頻(pin)(pin)電(dian)(dian)(dian)(dian)(dian)(dian)能對負載(zai)加(jia)(jia)熱(re)；某些電(dian)(dian)(dian)(dian)(dian)(dian)氣設備用(yong)(yong)(yong)振(zhen)(zhen)蕩(dang)(dang)器(qi)(qi)做(zuo)成的(de)(de)無觸點開關進行控制；電(dian)(dian)(dian)(dian)(dian)(dian)子(zi)鐘和(he)電(dian)(dian)(dian)(dian)(dian)(dian)子(zi)手(shou)表中采用(yong)(yong)(yong)頻(pin)(pin)率穩定度很(hen)高(gao)的(de)(de)振(zhen)(zhen)蕩(dang)(dang)電(dian)(dian)(dian)(dian)(dian)(dian)路作為(wei)定時部件等(deng)。尤其在(zai)通(tong)(tong)信系統電(dian)(dian)(dian)(dian)(dian)(dian)路中，壓(ya)控振(zhen)(zhen)蕩(dang)(dang)器(qi)(qi)(VCO)是(shi)其關鍵部件，七專級壓(ya)控振(zhen)(zhen)蕩(dang)(dang)器(qi)(qi)加(jia)(jia)工(gong)，特別是(shi)在(zai)鎖相環電(dian)(dian)(dian)(dian)(dian)(dian)路、時鐘恢復電(dian)(dian)(dian)(dian)(dian)(dian)路和(he)頻(pin)(pin)率綜合器(qi)(qi)電(dian)(dian)(dian)(dian)(dian)(dian)路等(deng)更是(shi)重中之重，可以毫不夸(kua)張地說(shuo)在(zai)電(dian)(dian)(dian)(dian)(dian)(dian)子(zi)通(tong)(tong)信技術(shu)領域，壓(ya)控振(zhen)(zhen)蕩(dang)(dang)器(qi)(qi)加(jia)(jia)工(gong)，VCO幾乎(hu)與電(dian)(dian)(dian)(dian)(dian)(dian)流源和(he)運(yun)放具有同等(deng)重要地位。

1. 中心頻率指(zhi)頻率調節范圍的中間(jian)值，CMOS輸出可達(da)到245.0MHz，LVDS可達(da)到2.1GHz， HCSL可達(da)到700MHz。

2. 輸出(chu)方式根據需要采用(yong)不同(tong)的輸出(chu)。CMOS， LVDS， HCSL， True Sine都(dou)有(you)不同(tong)的波形特征以(yi)及用(yong)途。

3. 工作電壓(ya)可(ke)根據具體型號選擇1.8V/2.5V/3.3V/5.0V。其中3.3V的應用較(jiao)為廣泛(fan)。

4. 壓(ya)(ya)控(kong)范圍通過調節控(kong)制電壓(ya)(ya)改變輸出頻率。單位為(wei)(wei)ppm，七專級壓(ya)(ya)控(kong)振(zhen)蕩器加工，范圍一(yi)般為(wei)(wei)±50~200ppm。

5. 頻(pin)率穩定(ding)度在(zai)工作溫度范(fan)圍內，對標稱頻(pin)率允許的(de)偏差，單位(wei)一般為(wei)百萬分之(zhi)一即ppm。

6. 工作溫度(du)工業級標(biao)準-40~85℃。特殊應(ying)用會(hui)對溫度(du)有更高的要求。