Miscellaneous active electrical nonlinear devices – circuits – and – Gating – Utilizing three or more electrode solid-state device
Patent
1994-06-09
1995-05-09
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Gating
Utilizing three or more electrode solid-state device
327333, 326 68, H03K 190185
Patent
active
054143144
ABSTRACT:
An integrated CMOS high swing interface output stage which can transmit and receive data from other devices which may include devices operating from a different, particularly a higher, voltage power supply. The interface utilizes three P-channel devices in a common well on the substrate and three N-channel devices in another common well on the substrate. Two of the three P-channel devices are connected in series between the positive power supply terminal and the output of the interface and two of the N-channel devices are connected in series between the output of the interface and a negative power supply terminal. The third P-channel device is connected between the common connection of all three P-channel devices and the local substrate and the gate of the P-channel device which is connected to the positive power supply terminal. The third N-channel device is similarly connected between the common connection of all three N-channel devices and the respective local substrate and the gate of the N-channel device connected to the negative power supply terminal. Appropriate control of all six devices provides free swinging of the output beyond the range of the power supply when not powered and when powered but inactive, while providing drive of the output when the interface is active.
REFERENCES:
patent: 4380710 (1983-04-01), Cohen et al.
patent: 5136190 (1992-08-01), Chern et al.
patent: 5194767 (1993-03-01), Chao
patent: 5237213 (1993-08-01), Tanoi
Callahan Timothy P.
Maxim Integrated Products
Shin Eunja
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