CD4060是一種內部功能完善的集成塊，應用比較靈活。本文介紹一種巧妙利CD4060的一些特點設計出的快速充電器。
    大 家知道，鎳鎳電(dian)(dian)(dian)(dian)(dian)池充足(zu)電(dian)(dian)(dian)(dian)(dian)后，電(dian)(dian)(dian)(dian)(dian)池兩端電(dian)(dian)(dian)(dian)(dian)壓(ya)不(bu)僅(jin)不(bu)再(zai)上升，還(huan)會出現(xian)下(xia)降趨勢。如果在充電(dian)(dian)(dian)(dian)(dian)過程中測出其下(xia)降趨勢，便可保證電(dian)(dian)(dian)(dian)(dian)池所(suo)(suo)需的準確充電(dian)(dian)(dian)(dian)(dian)時(shi)間，實現(xian)大電(dian)(dian)(dian)(dian)(dian)流 快速(su)充電(dian)(dian)(dian)(dian)(dian)，延長電(dian)(dian)(dian)(dian)(dian)池壽命。但(dan)多(duo)數電(dian)(dian)(dian)(dian)(dian)路(lu)較復雜，不(bu)易制(zhi)作。平時(shi)所(suo)(suo)見充電(dian)(dian)(dian)(dian)(dian)器電(dian)(dian)(dian)(dian)(dian)路(lu)多(duo)用(yong)電(dian)(dian)(dian)(dian)(dian)壓(ya)比較法，不(bu)易調準，常(chang)產(chan)生(sheng)誤差(cha)。本電(dian)(dian)(dian)(dian)(dian)路(lu)適(shi)用(yong)于所(suo)(suo)提要求，且可提供不(bu)同(tong)(tong)的 充電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)流以適(shi)應不(bu)同(tong)(tong)的需要，電(dian)(dian)(dian)(dian)(dian)路(lu)簡單(dan)，制(zhi)作容(rong)易。

    電路如圖所示。ICl中的壓控振蕩器(VCO)受加在9腳上的電池電壓的控制， 其輸出信號一路送入IC2中的相位比較器14腳，與IC2中的VCO信號進行相位比較，比較結果控制IC2中的壓控振蕩器；另一路送入ICl中的相位比較器，與IC2來的VCO信號進行比較，其結果控制充電電路。充電時，電池電壓上升，使ICl中的VCO振蕩頻率上升。當13腳為低電平時，C6放電極其緩 慢。
電(dian)(dian)(dian)路(lu)(lu)中，VD3為IC提供恒(heng)定電(dian)(dian)(dian)壓，可(ke)(ke)防止干(gan)擾。VDl、V4組成恒(heng)流(liu)(liu)電(dian)(dian)(dian)路(lu)(lu)，可(ke)(ke)防止誤(wu)動(dong)(dong)作且轉動(dong)(dong)開關S2,可(ke)(ke)獲得不同的充(chong)(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)流(liu)(liu)，按圖 6?15所示(shi)，可(ke)(ke)分別獲得約50mA(R9擋)、300mA(R8擋)、1A(R10擋)的充(chong)(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)流(liu)(liu)。電(dian)(dian)(dian)容Cl、電(dian)(dian)(dian)阻Rl為延時電(dian)(dian)(dian)路(lu)(lu)，它主要用以防止干(gan)擾 引(yin)起(qi)誤(wu)動(dong)(dong)作及(ji)可(ke)(ke)長時間(jian)不取(qu)出(chu)電(dian)(dian)(dian)池。若C6放電(dian)(dian)(dian)過多，電(dian)(dian)(dian)路(lu)(lu)便重(zhong)新啟動(dong)(dong)充(chong)(chong)電(dian)(dian)(dian)。S1為電(dian)(dian)(dian)源(yuan)開關兼啟動(dong)(dong)開關。S3為微動(dong)(dong)開關，可(ke)(ke)消除C6上電(dian)(dian)(dian)壓對下次充(chong)(chong)電(dian)(dian)(dian)的影響。