Simplified low-noise output buffer circuit.

摘要

An output buffer circuit has a pull-up output transistor (14) controlled by a first node (15) and a pull-down output transistor (16) controlled by a second node (18). The first node (15) is coupled to the second node (18) through a switching stage (10) controlled by feedback from the output terminal (3). When the output buffer circuit is switched between the high and low output states, the switching stage (10) is initially on, switches off shortly after the potential of the output terminal (3) begins to change, then switches on again when the output terminal (3) reaches a certain intermediate potential. <IMAGE>