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(da)(da) 家知道，鎳(nie)鎳(nie)電(dian)(dian)池(chi)充足電(dian)(dian)后，電(dian)(dian)池(chi)兩端電(dian)(dian)壓(ya)不(bu)(bu)(bu)僅不(bu)(bu)(bu)再上升，還(huan)會出(chu)現(xian)下降趨勢(shi)。如果在充電(dian)(dian)過程中(zhong)測出(chu)其下降趨勢(shi)，便可保證電(dian)(dian)池(chi)所(suo)需的準(zhun)確充電(dian)(dian)時(shi)間(jian)，實(shi)現(xian)大(da)(da)電(dian)(dian)流 快速充電(dian)(dian)，延長電(dian)(dian)池(chi)壽命。但(dan)多(duo)數電(dian)(dian)路(lu)(lu)較復(fu)雜，不(bu)(bu)(bu)易制作(zuo)。平(ping)時(shi)所(suo)見(jian)充電(dian)(dian)器電(dian)(dian)路(lu)(lu)多(duo)用電(dian)(dian)壓(ya)比(bi)較法，不(bu)(bu)(bu)易調(diao)準(zhun)，常產生誤差。本電(dian)(dian)路(lu)(lu)適(shi)用于所(suo)提要(yao)求，且(qie)可提供不(bu)(bu)(bu)同的 充電(dian)(dian)電(dian)(dian)流以適(shi)應不(bu)(bu)(bu)同的需要(yao)，電(dian)(dian)路(lu)(lu)簡單(dan)，制作(zuo)容易。

    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)路(lu)中，VD3為IC提(ti)供(gong)恒(heng)定電(dian)(dian)壓，可防(fang)止干擾(rao)。VDl、V4組(zu)成(cheng)恒(heng)流(liu)電(dian)(dian)路(lu)，可防(fang)止誤動(dong)(dong)作(zuo)且轉動(dong)(dong)開關(guan)S2,可獲(huo)得不同(tong)的(de)充電(dian)(dian)電(dian)(dian)流(liu)，按圖(tu) 6?15所示，可分(fen)別獲(huo)得約50mA(R9擋(dang))、300mA(R8擋(dang))、1A(R10擋(dang))的(de)充電(dian)(dian)電(dian)(dian)流(liu)。電(dian)(dian)容Cl、電(dian)(dian)阻Rl為延時電(dian)(dian)路(lu)，它主(zhu)要用以(yi)防(fang)止干擾(rao) 引(yin)起(qi)誤動(dong)(dong)作(zuo)及可長時間不取出電(dian)(dian)池(chi)。若C6放電(dian)(dian)過(guo)多，電(dian)(dian)路(lu)便重(zhong)新啟(qi)動(dong)(dong)充電(dian)(dian)。S1為電(dian)(dian)源開關(guan)兼啟(qi)動(dong)(dong)開關(guan)。S3為微動(dong)(dong)開關(guan)，可消除C6上電(dian)(dian)壓對下次充電(dian)(dian)的(de)影響。