JPS6457490A - Dynamic ram - Google Patents
Dynamic ramInfo
- Publication number
- JPS6457490A JPS6457490A JP62215579A JP21557987A JPS6457490A JP S6457490 A JPS6457490 A JP S6457490A JP 62215579 A JP62215579 A JP 62215579A JP 21557987 A JP21557987 A JP 21557987A JP S6457490 A JPS6457490 A JP S6457490A
- Authority
- JP
- Japan
- Prior art keywords
- level
- data
- circuit
- memory cell
- time
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Dram (AREA)
Abstract
PURPOSE:To obtain a dynamic RAM for increasing a circuit margin, by disposing a voltage impressing circuit for impressing a negative voltage on a memory cell correspondingly to the data of 'L' level. CONSTITUTION:At the time of writing the data of 'H' level, a transistor 3 is not turned on, but a VCC is transferred to a bit line 14 and a positive voltage is stored in the capacitor 11 of the memory cell M. At the time of writing the data of the 'L' level, an inverter circuit 2 is turned on correspondingly to the data of the 'L' level to excite the transistor 3, impress the negative voltage outputted from a negative voltage generating circuit 1 to the capacitor 11 of the memory cell M through the bit line 14 and store a negative charge. Thereby, a potential difference between the 'H' level and the 'L' level at the time of reading can be increased to increase the circuit margin.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62215579A JPS6457490A (en) | 1987-08-28 | 1987-08-28 | Dynamic ram |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62215579A JPS6457490A (en) | 1987-08-28 | 1987-08-28 | Dynamic ram |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6457490A true JPS6457490A (en) | 1989-03-03 |
Family
ID=16674774
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62215579A Pending JPS6457490A (en) | 1987-08-28 | 1987-08-28 | Dynamic ram |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6457490A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03219490A (en) * | 1990-01-23 | 1991-09-26 | Matsushita Electric Ind Co Ltd | Sense amplifier circuit |
US5255223A (en) * | 1990-07-23 | 1993-10-19 | Oki Electric Industry Co., Ltd. | Semiconductor memory device having alternatively operated equalizing and erasing functions |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5489534A (en) * | 1977-12-27 | 1979-07-16 | Nec Corp | Semiconductor memory device |
-
1987
- 1987-08-28 JP JP62215579A patent/JPS6457490A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5489534A (en) * | 1977-12-27 | 1979-07-16 | Nec Corp | Semiconductor memory device |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03219490A (en) * | 1990-01-23 | 1991-09-26 | Matsushita Electric Ind Co Ltd | Sense amplifier circuit |
US5255223A (en) * | 1990-07-23 | 1993-10-19 | Oki Electric Industry Co., Ltd. | Semiconductor memory device having alternatively operated equalizing and erasing functions |
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