National Semiconductors LF347N 4²óÏ©¥ª¥Ú¥¢¥ó¥× Ãæ¸ÅÉÊ 2¸Ä¥»¥Ã¥È¤Ç¤¹¡£TL074 / TL084 ¤Ê¤É¤ÈƱÍͤÎÈÆÍÑÉÊ¥¯¥¡¥Ã¥É¥ª¥Ú¥¢¥ó¥×¤Ç¤¹¡£90ǯÂå¤Îµ¡ºà¤«¤éÈ´¤¼è¤Ã¤¿Ãæ¸ÅÉʤǥϥó¥À¤ÎÀפ¬¤¢¤ê¤Þ¤¹¤¬¡¢Æ°ºî¤ËÌäÂê¤Ï¤¢¤ê¤Þ¤»¤ó¡£