Output buffer circuits.

摘要

An output buffer circuit is disclosed that minimizes ground bounce problems. The buffer circuit provides for an output pull-down pre-driver circuit that can be controlled by a programmable signal to minimize the ground bounce. By placing a strong and weak transistor on the gate of the output driver transistor and providing control circuitry for disabling the stronger transistor appropriately, an output signal is provided that can be driven quickly or slowly to its active level. By disabling the stronger transistor, ground bounce problems associated with high to low transitions of output drive transistor are significantly reduced.