A CMOS off-chip driver circuit is provided which includes a first P-channel field effect transistor arranged in series with a second or pull-up P-channel transistor and a third P-channel transistor connected from the common point between the first and second transistors and the gate electrode of the...http://www.google.com.tw/patents/US4782250?utm_source=gb-gplus-share專利 US4782250 - CMOS off-chip driver circuits
