| 摘要 |
PROBLEM TO BE SOLVED: To provide a level converter which is capable of determining an initial value of a latch circuit and has excellent symmetry in rising/falling characteristics of an output signal. SOLUTION: MOS transistors Tp3, Tp4 for initial value setting are inserted and connected between nodes N1, N2 that become output terminals of first and second inverters 32, 33 constituting a latch circuit 31 of a shift circuit 12 and transistors Tp1, Tp2. A gate of the MOS transistor Tp3 is then connected to a ground and a gate of the MOS transistor Tp4 is connected to an initial value setting circuit 34. The initial value setting circuit 34 controls a gate potential of the MOS transistor Tp4 to an intermediate potential between a second high potential power source VDE and the ground when the second high potential power source VDE is below a predetermined level, and controls the gate potential to a ground level so as to turn on the MOS transistor Tp4 when the second high potential power source VDE is above the predetermined level. COPYRIGHT: (C)2008,JPO&INPIT
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