Level-shift circuit

Details Level-shift circuit Level-shift circuit

2011-08-30

2011-08-30

Ismail, Shawki S (Department: 2819)

Electronic digital logic circuitry

Interface

Supply voltage level shifting

Reexamination Certificate

active

08008945

ABSTRACT:
A level-shift circuit converts a first voltage level into a second voltage level different from the first voltage level. The level-shift circuit includes a first high-side signal detection circuit, a second high-side signal detection circuit, a drive circuit and electric current detection circuits. The first high-side signal detection circuit sets a logical voltage state of the second voltage level via a first capacitor. The second high-side signal detection circuit resets the logical voltage state of the second voltage level via a second capacitor. The drive circuit on-off drives a high-side switch connected to a low-side switch in series by a set signal of the first high-side signal detection circuit and a reset signal of the second high-side signal detection circuit. The electric current detection circuits detect an electric current flowing into or from the first and/or second capacitors.

REFERENCES:
patent: 5543740 (1996-08-01), Wong
patent: 2005-512444 (2005-04-01), None
U.S. Appl. No. 12/607,646, filed Oct. 28, 2009, Osaka.

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