P+F±àÂëÆ÷µÄ×÷Óù¦ÄÜÓÐÄÄЩ
P+F±àÂëÆ÷µÄ·Ö±æÂÊ£¬Ò²¾ÍÊÇһתËù·¢³öµÄÂö³åÊý£¬±àÂëÆ÷ûÓб¶Æµ¼¼Êõ£¬ÊǽÓÊÕÆ÷´¦ÀíÂö³åʱͨ¹ý±àÂëÆ÷Êä³öÂö³å£¨AÓëBÏࣩµÄÏàλ²î¹ØϵʵÏÖ±¶Æµ¼¼ÊõµÄ¡£
P+F±àÂëÆ÷Êǵ±¶à¸öÊäÈë¶ËͬʱÓÐÐźÅʱ,µç·ֻ¶ÔÆäÖÐÓűðzui¸ßµÄÊäÈëÐźŽøÐбàÂë¡£³£Óõļ¯³ÉÓűàÂëÆ÷ICÓÐ10Ïß-4Ïß¡¢8Ïß-3ÏßÁ½ÖÖ¡£10Ïß-4ÏßÓűàÂëÆ÷³£¼ûµÄÐͺÅΪ54/74147¡¢54/74LS147£¬8Ïß-3ÏßÓűàÂëÆ÷³£¼ûµÄÐͺÅΪ54/74148¡¢54/74LS148¡£ 
ÏÂÃæÎÒÃÇÒÔTTLÖйæÄ£¼¯³Éµç·74LS147ΪÀý½éÉÜ8421→BCDÂëÓűàÂëÆ÷µÄ¹¦ÄÜ¡£
10Ïß-4Ïß8421 BCDÂëÓűàÂëÆ÷74LS147µÄÕæÖµ±í¼û±í3.5¡£74LS147µÄÒý½ÅͼÈçͼ3.5Ëùʾ£¬ÆäÖÐ9½ÅNCΪ¿Õ¡£74LS147ÓűàÂëÆ÷ÓÐ9¸öÊäÈë¶ËºÍ4¸öÊä³ö¶Ë¡£Ä³¸öÊäÈë¶ËΪ0£¬´ú±íÊäÈëijһ¸öÊ®½øÖÆÊý¡£µ±9¸öÊäÈë¶ËȫΪ1ʱ£¬´ú±íÊäÈëµÄÊÇÊ®½øÖÆÊý0¡£4¸öÊä³ö¶Ë·´Ó³ÊäÈëÊ®½øÖÆÊýµÄBCDÂë±àÂëÊä³ö¡£
74LS147ÓűàÂëÆ÷µÄÊäÈë¶ËºÍÊä³ö¶Ë¶¼Êǵ͵çƽÓÐЧ£¬¼´µ±Ä³Ò»¸öÊäÈë¶ËµÍµçƽ0ʱ£¬4¸öÊä³ö¶Ë¾ÍÒԵ͵çƽ0µÄÊä³öÆä¶ÔÓ¦µÄ8421 BCD±àÂë¡£µ±9¸öÊäÈëȫΪ1ʱ£¬4¸öÊäÈë³öҲȫΪ1£¬´ú±íÊäÈëÊ®½øÖÆÊý0µÄ8421 BCD±àÂëÊä³ö¡£