High-speed lever shifter with AC feed-forward

Details High-speed lever shifter with AC feed-forward High-speed lever shifter with AC feed-forward

2006-10-31

2006-10-31

Le, Don (Department: 2819)

Electronic digital logic circuitry

Interface

Logic level shifting

C326S063000

Reexamination Certificate

active

07129752

ABSTRACT:
An improved level shifter circuit with AC feed-forward is disclosed. The integrated circuit device includes a first circuit part biased from a lower voltage supply and a second circuit part biased from a higher voltage supply. One of the circuit parts has an RS flip-flop with two complementary signal outputs and the other one has a signal input and a first and a second switching transistor. The first and the second switching transistors each have a current channel DC coupled in series with a respective cascode-connected transistor which is connected to a respective one of the signal outputs. One of these outputs is coupled to the input through a first feed-forward AC series circuit of an inverter and a first coupling capacitor, and the other output is coupled to the input through a second feed-forward AC circuit including a second coupling capacitor.

REFERENCES:
patent: 4703199 (1987-10-01), Ely
patent: 5732249 (1998-03-01), Masuda et al.
patent: 6201429 (2001-03-01), Rosenthal
patent: 2002/0080651 (2002-06-01), Tanzawa et al.
patent: 2003/0107425 (2003-06-01), Yushan
patent: 2006/0012415 (2006-01-01), Chen
patent: 102 46 083 (2004-03-01), None

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