Level-shifting pass gate multiplexer

Electronic digital logic circuitry – Multifunctional or programmable – Sequential or with flip-flop

Reexamination Certificate

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Details

C326S038000

Reexamination Certificate

active

11454315

ABSTRACT:
The present invention incorporates level-shifting functions within a multiplexer circuit that may be implemented in IC devices having low and high voltage domains. The multiplexer circuit utilizes pseudo-differential multiplexing architectures and employs level-shifting techniques to convert low-voltage signals received from the low-voltage domain into high-voltage signals more suitable for controlling the propagation of a selected input signal through the pass gates of the multiplexer circuit. For some embodiments, some of the select signals may be decoded to generate a number of decoded select signals that can be used to control the selective routing of signals through the multiplexer.

REFERENCES:
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patent: 2003/0179027 (2003-09-01), Kizer et al.
patent: 2003/0179028 (2003-09-01), Kizer et al.
patent: 2005/0039155 (2005-02-01), New
patent: 2005/0040851 (2005-02-01), New
patent: 2005/0189971 (2005-09-01), Kizer et al.
patent: 2005/0206419 (2005-09-01), Kizer et al.
U.S. Appl. No. 11/390,925, filed Mar. 28, 2006, Rahut et al.
U.S. Appl. No. 11/454,316, Tuan et al., filed Jun. 16, 2006, Structures and Methods for Heterogeneous Low Power Programmable Logic Device, Xilinx, Inc. 2100 Logic Drive, San Jose, CA 95124.

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