US4314360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor memory device
Assignee: Individual
•
Filing: 1980-05-19
•
Granted: 1982-02-02
•
Expires: 2000-05-19
Abstract
Abstract A semiconductor memory device comprising a memory cell array consisting of a plurality of cell transistors, and additional transistors connected between bit lines and a reference potential point for suppressing the lowering of the potential of a bit line when said semiconductor memory device is changed from a non-operative state to an operative state.
Inventors
- 👤 Mitsuo Higuchi
- 👤 Kiyoshi Miyasaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:34
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/21; G11C11/34; G11C11/40; G11C11/401; G11C11/4063; G11C11/407; G11C11/409; G11C11/4094; G11C16/00; G11C16/02; G11C16/06; G11C16/24; G11C17/00; G11C17/08; G11C17/10; G11C17/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
88 words
A semiconductor memory device comprising a plurality of word lines, a plurality of bit lines and a plurality of cell transistors, each of which is connected between one of said bit lines and a point of the reference potential, characterized in that additional transistors are connected between said bit lines and said point of reference potential, whereby suppression of the lowering of the potential of a bit line is effected by said additional transistors when said semiconductor memory device changes from the non-operative state into the operative state.
Claim 2
Dependent Claim
88 words
A semiconductor memory device comprising a plurality of word lines, a plurality of bit lines and a plurality of cell transistors, each of which is connected between one of said bit lines and a point of the reference potential, characterized in that additional transistors are connected between said bit lines and said point of reference potential, whereby suppression of the lowering of the potential of a bit line is effected by said additional transistors when said semiconductor memory device changes from the non-operative state into the operative state.
Claim 3
Dependent Claim
81 words
A semiconductor memory device comprising: a reference potential; a plurality of word lines; a plurality of bit lines; a plurality of cell transistors, each of which is connected between one of said bit lines and said reference potential; means for suppressing the lowering of the potential of a bit line when the semiconductor memory device changes from a non-operative state into an operative state; said means including a plurality of additional transistors connected between said bit lines and said reference potential.
Claim 4
Dependent Claim
81 words
A semiconductor memory device comprising: a reference potential; a plurality of word lines; a plurality of bit lines; a plurality of cell transistors, each of which is connected between one of said bit lines and said reference potential; means for suppressing the lowering of the potential of a bit line when the semiconductor memory device changes from a non-operative state into an operative state; said means including a plurality of additional transistors connected between said bit lines and said reference potential.
Claim 5
Dependent Claim
16 words
The semiconductor memory device of claim 2, wherein said additional transistors are of the MOS type.
Claim 6
Dependent Claim
19 words
A semiconductor memory device as set forth in claim 2, wherein said additional transistors are of the FAMOS type.
References Cited (Backward Citations)
US4112508A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-02-01 | 1985-08-03 | 1986-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-01 | 1989-08-03 | 1990-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-01 | 1993-08-03 | 1994-02-02 | $7700.00 | Window Closed / Lapsed |