Patent ID: 7061299
Filing Date: 2006-06-13
Classification: H03K

Abstract:
1. A bi-directional level shifter for shifting a low voltage digital signal to a high voltage digital signal and vice versa, the bi-directional level shifter comprising: a first I/O terminal for sending and receiving the low voltage digital signal, the first I/O terminal receiving the low voltage digital signal as an input when the bi-directional level shifter shifts the low voltage digital signal to the high voltage digital signal, and the first I/O terminal sending the low voltage digital signal as an output when the bi-directional level shifter shifts the high voltage digital signal to the low voltage digital signal; a second I/O terminal for sending and receiving the high voltage digital signal, the second I/O terminal receiving the high voltage digital signal as an input when the bi-directional level shifter shifts the high voltage digital signal to the low voltage digital signal, and the second I/O terminal sending the high voltage digital signal as an output when the bi-directional level shifter shifts the low voltage digital signal to the high voltage digital signal; a first circuit operating at a low power supply voltage, the circuit comprising: a second circuit operating at a high power supply voltage, the second circuit comprising: a gate connected to the second I/O terminal.