| 摘要 |
PROBLEM TO BE SOLVED: To provide a voltage level control circuit whose power consumption is reduced, and to provide a control method. SOLUTION: When an external signal PL becomes 'H', an output signal La of a latch 11 becomes the 'H', N.FETs 14, 17, 24 are turned on. Thereby, the circuit becomes an active state, and the 'H' is outputted as a signal A for controlling boost-voltage Vbt (word line drive voltage). When the boost- voltage Vbt is boosted and arrives at reference voltage Vref2, voltage V2 is made 'H', thereby, the signal A is made 'L'. When the signal A becomes 'L', the latch 11 becomes a through state. Since the signal PL is the 'L' at the time, the output signal La of the latch 11 becomes the 'L', the N.FETs 14, 17, 24 are turned off. Thus, power consumption is reduducet by turning off the N.FETs 14, 17, 24 in a time zone being not required. COPYRIGHT: (C)2003,JPO
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