High current static MOS output buffer circuit for power-down mode of operation

摘要

A static push-pull driver circuit employs an enhancement mode transistor and a low threshold "natural" transistor as its push-pull output, and two parallel gating transistors in the driver circuit for the low-threshold transistor. One of the gating transistors is also a low-threshold natural transistor, and the other is a much smaller depletion mode transistor. The depletion transistor may be formed in the channel area of the other gating transistor by an ion implant. The common gate of the two gating transistors is connected to a chip select signal.