SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE
PURPOSE:To make it possible to restrain the deterioration of characteristics caused by repeating a program operation, without decreasing the operation margin, by providing the output terminal of a booster circuit with a switch circuit to make an output of the booster circuit leak for a specified per...
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Main Author | |
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Format | Patent |
Language | English |
Published |
21.02.1989
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Subjects | |
Online Access | Get full text |
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Summary: | PURPOSE:To make it possible to restrain the deterioration of characteristics caused by repeating a program operation, without decreasing the operation margin, by providing the output terminal of a booster circuit with a switch circuit to make an output of the booster circuit leak for a specified period shorter than program time. CONSTITUTION:A switch circuit 3 to make an output Vpp of a booster circuit 4 leak for a specified period shorter than program time is arranged on the output terminal of the booster circuit 4. Therefore, the waveform of booster circuit output Vpp at the time of rise-up can be smoothed by controlling the switch circuit 3. Differently from the case where the current supplying capability of the booster circuit 4 itself is decreased, it is possible that the rise-up characteristics are decreased only for a specified period by the switch circuit 3, and then the rise-up characteristics of the output electric potential can be recovered by turning off the switch circuit 3. Thereby, a program voltage having a sufficient margin can be obtained. |
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Bibliography: | Application Number: JP19870203391 |