Patent ID: 6061272
Filing Date: 2000-05-09
Classification: G11C

Abstract:
A write control circuit for use with a semiconductor memory device, which includes memory cell transistors and a write-in circuit, to control the timing of commencing a write operation by the write-in circuit, wherein the write-in circuit provides a write-in potential which is higher than a supply potential, said write control circuit comprising:a control potential generator for generating a first control potential which is maintained higher than the ground potential by a first predetermined voltage and a second control potential which is maintained lower than the supply potential by a second predetermined voltage;a first transistor connected to the supply potential and having a gate which receives a write-in potential;a second transistor connected between said first transistor and the ground potential and having a gate which receives the first control potential;a third transistor connected to the supply potential and having a gate which receives the second control potential; anda fourth transistor connected between said third transistor and the ground potential and having a gate which receives a potential at a first node between said first and second transistors, wherein a control signal commencing a write operation is delivered from a second node between said third and fourth transistors when the write-in potential reaches a predetermined potential.