Push Pull Driver
Original Publication Date: 1980-Oct-01
Included in the Prior Art Database: 2005-Feb-13
Fig. 1 shows a complementary driver with a transistor T1 and diode D1 series level shift network. Pulldown current through resistor R1 is limited by the maximum acceptable Schottky diode current. The low Ft of the PNP transistor T3 produces phase shift and turn-on delay which cannot be overcome without reducing the value of R1.