Miscellaneous active electrical nonlinear devices – circuits – and – Gating – Converging with plural inputs and single output
Patent
1998-12-23
2000-12-12
Wells, Kenneth B.
Miscellaneous active electrical nonlinear devices, circuits, and
Gating
Converging with plural inputs and single output
327409, 327410, 326 59, 326 60, H03K 1762
Patent
active
061604372
ABSTRACT:
The present invention discloses a multiplexer including that provides an output signal having a voltage range substantially equal to an input signal. The multiplexer further provides a breakdown prevention device that protects elements connected to an output terminal. The multiplexer can be used in an LCD driver or the like. The multiplexer according to the present invention can include a first switching circuit that receives a first input signal, a second switching circuit that receives a second input signal, wherein the first and second switching circuits are complementarily enabled in response to a three control signals, a third switching circuit that receives the first input signal switched from the first switching circuit and a fourth switching circuit that receives the second input signal switched from the second switching circuit. The third and fourth switching circuits are complementarily enabled by a selection signal to provide one of the first and second input signals to the output terminal. The multiplexer can further include a selection circuit to output one of a high prescribed voltage output signal and a low prescribed voltage output signal as the selection signal to enable the third and fourth switching circuits. Thus, the multiplexer can operate to allow two switching circuits to produce two different level output signals through a single output stage.
REFERENCES:
patent: 5438295 (1995-08-01), Reddy et al.
patent: 5465054 (1995-11-01), Erhart
patent: 5936426 (1999-08-01), Wilson et al.
Kim Kyu-Tae
Lee Won-Kee
Hyundai Electronics Industries Co,. Ltd.
Wells Kenneth B.
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