| 摘要 |
PROBLEM TO BE SOLVED: To provide a level conversion circuit that can surely be activated even if a voltage at a high logic level of input signals is low. SOLUTION: An input circuit (first transistor pair) for receiving complementary input signals is connected to a latch circuit (second transistor pair) that converts a first amplitude of the input signals into a second amplitude greater than the first amplitude. A current mirror circuit (third transistor pair) is located between the latch circuit and a high level power line. By the operation of the current mirror circuit, a source voltage of the second transistor that is turned on is lower than a source voltage of the second transistor that is turned off. The second transistor that is turned off is prone to be turned on even if an on-current of the corresponding first transistor is small. Conversely, the second transistor that is turned off is prone to be turned on. Thus, even if the voltage at the high logic level side of the input signals is low, the level conversion circuit is surely operated without a malfunction. COPYRIGHT: (C)2007,JPO&INPIT
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