Electronic digital logic circuitry – Interface – Supply voltage level shifting
Reexamination Certificate
2011-01-18
2011-01-18
Cho, James H. (Department: 2819)
Electronic digital logic circuitry
Interface
Supply voltage level shifting
C326S062000, C326S080000, C327S333000
Reexamination Certificate
active
07872499
ABSTRACT:
Disclosed is a level shift circuit that includes a first level shifter which is connected between an output terminal and a first power supply terminal that supplies a first voltage and sets the output terminal to a level of the first voltage when an input signal received at an input terminal assumes a first value; a second level shifter which is connected between the output terminal and a second power supply terminal that supplies a second voltage and sets the output terminal to a level of the second voltage when the input signal assumes a complementary value of the first value; and a feedback control unit that performs control of deactivating the first level shifter during a predetermined time interval including a point of time when the input signal is supplied when it is detected that the output terminal immediately before the input signal is received at the input terminal assumes the first voltage level. When the input signal supplied in the predetermined time interval assumes a value that sets the output terminal to the second voltage level, the second level shifter sets the output terminal to the second voltage level with the first level shifter deactivated.
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Cho James H.
McGinn IP Law Group PLLC
Renesas Electronics Corporation
Tabler Matthew C
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