| 摘要 |
PROBLEM TO BE SOLVED: To provide input/output circuits compatible with high signal levels.SOLUTION: A level shifter 410 has at least two pull down circuits (M1, M2, 412 or M3, M4, 422). The circuit is made of electronic components with reliability limits lower than a maximum signal level output by the level shifter. The level shifter also has a timing circuit 411, 421 coupled to the pull down circuits (M1, M2, 412 or M3, M4, 422). The timing circuit controls a time of application of an input signal (input, input_n) to the pull down circuits preventing a terminal-to-terminal signal level experienced by the electronic components from exceeding the reliability limits. |
