Bus line precharging tristate driver circuit

摘要

A tristate driver circuit is provided on an integrated circuit chip for driving a bus line or signal line located off of the chip. This circuit very rapidly charges the bus line or signal line to positive voltage level each time and just before it switches to its tristate or high impedance output condition. This eliminates the need for a pull-up resistor or pull-up transistor to be connected to the off-chip bus line or signal line.