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(nie)(nie)鎳(nie)(nie)電(dian)池(chi)(chi)充(chong)(chong)足電(dian)后，電(dian)池(chi)(chi)兩(liang)端(duan)電(dian)壓(ya)不(bu)僅(jin)不(bu)再上(shang)升，還會出(chu)(chu)現下降趨勢。如果在(zai)充(chong)(chong)電(dian)過程中測出(chu)(chu)其下降趨勢，便可保證(zheng)電(dian)池(chi)(chi)所需(xu)的(de)準確充(chong)(chong)電(dian)時間，實現大電(dian)流(liu) 快速充(chong)(chong)電(dian)，延(yan)長電(dian)池(chi)(chi)壽命。但多(duo)數電(dian)路(lu)較復(fu)雜，不(bu)易制作。平時所見(jian)充(chong)(chong)電(dian)器電(dian)路(lu)多(duo)用電(dian)壓(ya)比較法(fa)，不(bu)易調準，常(chang)產生誤差(cha)。本(ben)電(dian)路(lu)適用于所提要求，且可提供不(bu)同(tong)的(de) 充(chong)(chong)電(dian)電(dian)流(liu)以(yi)適應不(bu)同(tong)的(de)需(xu)要，電(dian)路(lu)簡(jian)單，制作容(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)(dian)路中，VD3為(wei)(wei)IC提供恒定電(dian)(dian)(dian)(dian)壓(ya)，可(ke)防止干(gan)擾。VDl、V4組成恒流電(dian)(dian)(dian)(dian)路，可(ke)防止誤(wu)動(dong)作且轉(zhuan)動(dong)開關S2,可(ke)獲得(de)不同的(de)充電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流，按(an)圖 6?15所(suo)示，可(ke)分別獲得(de)約(yue)50mA(R9擋)、300mA(R8擋)、1A(R10擋)的(de)充電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流。電(dian)(dian)(dian)(dian)容(rong)Cl、電(dian)(dian)(dian)(dian)阻Rl為(wei)(wei)延時(shi)電(dian)(dian)(dian)(dian)路，它主要用(yong)以防止干(gan)擾 引起誤(wu)動(dong)作及可(ke)長時(shi)間不取(qu)出電(dian)(dian)(dian)(dian)池。若C6放電(dian)(dian)(dian)(dian)過多，電(dian)(dian)(dian)(dian)路便重新(xin)啟(qi)(qi)動(dong)充電(dian)(dian)(dian)(dian)。S1為(wei)(wei)電(dian)(dian)(dian)(dian)源開關兼(jian)啟(qi)(qi)動(dong)開關。S3為(wei)(wei)微動(dong)開關，可(ke)消除(chu)C6上電(dian)(dian)(dian)(dian)壓(ya)對下次充電(dian)(dian)(dian)(dian)的(de)影響。