Output buffer circuit, input buffer circuit and...

Details Output buffer circuit, input buffer circuit and... Output buffer circuit, input buffer circuit and...

H - Electricity

03

K

H03K 19/0185 (2006.01) G05F 1/46 (2006.01) G05F 3/24 (2006.01) H03K 19/003 (2006.01)

Patent

CA 2139008

Bi-directional buffer circuit comprises a second P- channel transistor whose back gate is connected to a pad, a third P-channel transistor disposed between a gate of the second P-channel transistor and the pad with its back gate connected to the pad, and a first N-channel transistor and a fifth N-channel transistor whose gates are connected to a power source, so that an output buffer circuit, an input buffer circuit and a bi-directional buffer circuit can be produced without necessity of any additional processing step, wherein merely a single power source is incorporated, and a voltage higher than the source voltage is permitted to be applied to a common bus.

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