Bidirectional level shifter

Details Bidirectional level shifter Bidirectional level shifter

2006-06-13

2006-06-13

Nguyen, Long (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Amplitude control

C326S068000, C326S081000

Reexamination Certificate

active

07061299

ABSTRACT:
A bi-directional level shifter for shifting a digital signal from a low power supply voltage level to a high power supply voltage level and vice versa includes first and second I/O terminals, a first circuit operating at a low power supply voltage, and a second circuit operating at a high power supply voltage. The first circuit and the second circuit are connected to both of the I/O terminals. When a low voltage digital signal is applied at the first I/O terminal, a high voltage digital signal is generated at the second I/O terminal. Similarly, if a high voltage digital signal is applied at the second I/O terminal, a low voltage digital signal is generated at the first I/O terminal.

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Schutte, Herman; “Bidirectional level shifter for I2C-bus and other systems”; Aug. 4, 1997; pp. 1-16; Phillips Semiconductors Application Note #AN97055; The Netherlands.

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