壓控震蕩器

   壓(ya)(ya)(ya)控(kong)(kong)(kong)振(zhen)(zhen)蕩(dang)(dang)(dang)器(qi)(qi)簡單的說就是(shi)振(zhen)(zhen)蕩(dang)(dang)(dang)頻(pin)率(lv)(lv)(lv)wo (t)受(shou)控(kong)(kong)(kong)制(zhi)電(dian)(dian)壓(ya)(ya)(ya)Vc (t)控(kong)(kong)(kong)制(zhi)的振(zhen)(zhen)蕩(dang)(dang)(dang)器(qi)(qi)。壓(ya)(ya)(ya)控(kong)(kong)(kong)振(zhen)(zhen)蕩(dang)(dang)(dang)一般(ban)可通(tong)過(guo)變(bian)容二(er)(er)級管來實現。因為變(bian)容二(er)(er)級管的電(dian)(dian)容是(shi)承外加偏置電(dian)(dian)壓(ya)(ya)(ya)的變(bian)化而變(bian)化，通(tong)過(guo)偏置電(dian)(dian)壓(ya)(ya)(ya)去控(kong)(kong)(kong)制(zhi)變(bian)容二(er)(er)級管電(dian)(dian)容的控(kong)(kong)(kong)制(zhi)達到對振(zhen)(zhen)蕩(dang)(dang)(dang)器(qi)(qi)頻(pin)率(lv)(lv)(lv)的控(kong)(kong)(kong)制(zhi)。在鎖相(xiang)(xiang)(xiang)(xiang)環路中(zhong)壓(ya)(ya)(ya)控(kong)(kong)(kong)振(zhen)(zhen)蕩(dang)(dang)(dang)器(qi)(qi)的輸(shu)出(chu)頻(pin)率(lv)(lv)(lv)是(shi)受(shou)鑒相(xiang)(xiang)(xiang)(xiang)器(qi)(qi)輸(shu)出(chu)的相(xiang)(xiang)(xiang)(xiang)位(wei)(或頻(pin)率(lv)(lv)(lv)）誤(wu)差(cha)(cha)電(dian)(dian)壓(ya)(ya)(ya)控(kong)(kong)(kong)制(zhi)，當壓(ya)(ya)(ya)控(kong)(kong)(kong)振(zhen)(zhen)蕩(dang)(dang)(dang)器(qi)(qi)的頻(pin)wo與(yu)輸(shu)入(ru)信號的頻(pin)率(lv)(lv)(lv)，七專級壓(ya)(ya)(ya)控(kong)(kong)(kong)振(zhen)(zhen)蕩(dang)(dang)(dang)器(qi)(qi)報價，不同步時，七專級壓(ya)(ya)(ya)控(kong)(kong)(kong)振(zhen)(zhen)蕩(dang)(dang)(dang)器(qi)(qi)報價，則鑒相(xiang)(xiang)(xiang)(xiang)器(qi)(qi)兩輸(shu)入(ru)信號(ui uo）之間(jian)的相(xiang)(xiang)(xiang)(xiang)位(wei)差(cha)(cha)Qe是(shi)時變(bian)的，鑒相(xiang)(xiang)(xiang)(xiang)器(qi)(qi)輸(shu)出(chu)是(shi)與(yu)相(xiang)(xiang)(xiang)(xiang)位(wei)（頻(pin)率(lv)(lv)(lv)）相(xiang)(xiang)(xiang)(xiang)關的誤(wu)差(cha)(cha)電(dian)(dian)壓(ya)(ya)(ya)ud (t)，該誤(wu)差(cha)(cha)電(dian)(dian)壓(ya)(ya)(ya)通(tong)過(guo)低通(tong)濾(lv)波(bo)器(qi)(qi)濾(lv)波(bo)，加到壓(ya)(ya)(ya)控(kong)(kong)(kong)振(zhen)(zhen)蕩(dang)(dang)(dang)器(qi)(qi)上，由于相(xiang)(xiang)(xiang)(xiang)位(wei)負反饋(kui)作用，該控(kong)(kong)(kong)制(zhi)電(dian)(dian)壓(ya)(ya)(ya)Vc將向(xiang)(xiang)少uo與(yu)ui之間(jian)的頻(pin)率(lv)(lv)(lv)差(cha)(cha)的方向(xiang)(xiang)改變(bian)壓(ya)(ya)(ya)控(kong)(kong)(kong)振(zhen)(zhen)蕩(dang)(dang)(dang)器(qi)(qi)的頻(pin)率(lv)(lv)(lv)，使壓(ya)(ya)(ya)控(kong)(kong)(kong)振(zhen)(zhen)蕩(dang)(dang)(dang)器(qi)(qi)的頻(pin)率(lv)(lv)(lv)wo與(yu)輸(shu)入(ru)信號頻(pin)率(lv)(lv)(lv)同步。所以壓(ya)(ya)(ya)控(kong)(kong)(kong)振(zhen)(zhen)蕩(dang)(dang)(dang)器(qi)(qi)可看成電(dian)(dian)壓(ya)(ya)(ya)——頻(pin)率(lv)(lv)(lv)變(bian)換器(qi)(qi)。

DRO系列(lie)壓(ya)控(kong)振(zhen)蕩(dang)器是一種基本的(de)窄帶(dai)信(xin)號源，七專級(ji)壓(ya)控(kong)振(zhen)蕩(dang)器報價(jia)，它(ta)利(li)用高Q介質諧(xie)振(zhen)器實現了好的(de)相位噪聲(sheng)性(xing)能(neng)。目(mu)前，DRO VCO解決方案適用于在(zai)7至(zhi)14 GHz范圍內工作的(de)頻率(lv)。該可(ke)(ke)定(ding)制的(de)超低噪聲(sheng)振(zhen)蕩(dang)器系列(lie)可(ke)(ke)提(ti)供電氣(qi)調諧(xie)和機械調諧(xie)，以實現精細的(de)頻率(lv)精度

CRO或陶瓷諧振器系列振蕩器以提供出色的相位噪聲性。 它們在范圍內可用從400 MHz到8 GHz的任何頻率，同時提供非常低的調諧靈敏度以優化性能。 

利用(yong)壓控(kong)振蕩器來控(kong)制(zhi)頻率

高(gao)(gao)頻壓(ya)(ya)控振蕩器的(de)電(dian)(dian)(dian)(dian)壓(ya)(ya)控制頻率(lv)部份(fen)， 通常是(shi)用變(bian)(bian)容(rong)(rong)(rong)二(er)極(ji)(ji)(ji)管(guan)C 與電(dian)(dian)(dian)(dian)感(gan) L， 所(suo)接(jie)成的(de) LC 諧(xie)振電(dian)(dian)(dian)(dian)路。提高(gao)(gao)變(bian)(bian)容(rong)(rong)(rong)二(er)極(ji)(ji)(ji)管(guan)的(de)逆向偏壓(ya)(ya)， 二(er)極(ji)(ji)(ji)管(guan)內的(de)空泛區會加大， 兩導體面之(zhi)距(ju)離一變(bian)(bian)長(chang)， 電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)就(jiu)(jiu)降(jiang)低(di)了，壓(ya)(ya)控振蕩器報價， 此 LC 電(dian)(dian)(dian)(dian)路的(de)諧(xie)振頻率(lv)， 就(jiu)(jiu)會被提高(gao)(gao). 反之(zhi)， 降(jiang)低(di)逆向偏壓(ya)(ya)時， 二(er)極(ji)(ji)(ji)管(guan)內的(de)電(dian)(dian)(dian)(dian)容(rong)(rong)(rong)變(bian)(bian)大， 頻率(lv)就(jiu)(jiu)會降(jiang)低(di).

而(er)低(di)頻(pin)壓(ya)控振蕩器則依照不(bu)(bu)同(tong)頻(pin)率而(er)選擇不(bu)(bu)同(tong)的(de)方法，例如以(yi)改(gai)變對電容的(de)充電速(su)率為手段來得到一個電壓(ya)控制的(de)電流源。參見波型產(chan)生器。