On-off sklop

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Primjer upotrebe je <A HREF="shema_nicd_punjaca.htm" TARGET="_top" TITLE="NiCd shema"><U>NICD</U></A>. Prilikom uključenja sigurno kreće sa off stanjem. Osim CD4053 ima samo dva otpornik i jedan kondenzator. Sličan sklop se može realizirati sa dva tranzistora i dva otpornika. Međutim ovaj sklop ima prednosti nad njime:</div> <bR> <div> <IMG BORDER="0" SRC="Symb075c00b700f000000000.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">mala osjetljivost na smetnje</div> <div> <IMG BORDER="0" SRC="Symb075c00b700f000000000.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">zadano start stanje je uvijek off</div> <div> <IMG BORDER="0" SRC="Symb075c00b700f000000000.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">ima dvije slobodne mosfet sklopke</div> <div> <IMG BORDER="0" SRC="Symb075c00b700f000000000.gif" HEIGHT="16" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">jednostavnija realizacija kontrole drugih sklopova</div> <bR> <div>      Sklop se može upotrebiti i kao jednostavni smitt triger. Komparacija je na 50% napona napajanja sa histerezom 9%. Smanjivanjem kondenzatora se povećava frekvencijski odziv.</div> <bR> <div> <IMG SRC="53da0640.gif" border=0 width="416" height="356" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <div>      Umjesto CD4053 može se koristiti i 74HC4053. Time se dobiva na smanjenom otporu mosfet sklopki, ali za posljedicu imamo također i ograničenje napona napajanja na 2-5V.</div> <bR> </td> </tr></table></body>