US4901284A
Expired / Lapsed
US
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Static random access memory
Assignee: Toshiba Corp
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Filing: 1988-12-22
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Granted: 1990-02-13
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Expires: 2008-12-22
Abstract
Abstract A static random access memory comprising a memory cell array, a plurality of peripheral circuits, first and second power-supply voltage lines, a bonding pad, and a level-shifting circuit. The array has static memory cells each having resistors functioning as load elements. The peripheral circuits control the writing of data into, and the reading of data from, the static memory cells. The first power-supply voltage line applies a first power-supply voltage to the peripheral circuits. The bonding pad is connected to the first power-supply voltage line. The second power-supply voltage line applies a second power-supply voltage to the static memory cells. The level-shifting means is connected between the first and second power-supply voltage lines, for shifting the level of the first power-supply voltage and applying the level-shifted voltage to the static memory cells via said second power-supply voltage line.
Inventors
- 👤 Kiyofumi Ochii
- 👤 Masataka Matsui
- 👤 Osamu Ozawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:09
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/21; G11C11/34; G11C11/40; G11C11/41; G11C11/412
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
116 words
A static random access memory comprising: an array of static memory cells each having resistors functioning as load elements; peripheral circuits for controlling the writing of data into, and the reading of data from, the static memory cells; a first power-supply voltage line for applying a first power-supply voltage to the peripheral circuit; a bonding pad connected to the first power-supply voltage line; a second power-supply voltage line for applying a second power-supply voltage to the static memory cells; and level-shifting means connected between the first and second power-supply voltage lines, for shifting the level of the first power-supply voltage and applying the level-shifted voltage to the static memory cells via said second power-supply voltage line.
Claim 2
Dependent Claim
116 words
A static random access memory comprising: an array of static memory cells each having resistors functioning as load elements; peripheral circuits for controlling the writing of data into, and the reading of data from, the static memory cells; a first power-supply voltage line for applying a first power-supply voltage to the peripheral circuit; a bonding pad connected to the first power-supply voltage line; a second power-supply voltage line for applying a second power-supply voltage to the static memory cells; and level-shifting means connected between the first and second power-supply voltage lines, for shifting the level of the first power-supply voltage and applying the level-shifted voltage to the static memory cells via said second power-supply voltage line.
Claim 3
Dependent Claim
21 words
The static random access memory according to claim 1, wherein said level-shifting means is an MOS switching element having a gate.
Claim 4
Dependent Claim
31 words
The static random access memory according to claim 2, wherein a second bonding pad is provided, and the gate of said MOS switching element is connected to the second bonding pad.
Claim 5
Dependent Claim
29 words
The static random access memory according to claim 1, wherein a third bonding pad is provided, and said second power-supply voltage line is connected to the third bonding pad.
Claim 6
Dependent Claim
17 words
The static random access memory according to claim 1, wherein said level-shifting means is a voltage-drop circuit.
Claim 7
Dependent Claim
27 words
The static random access memory according to claim 5, wherein said voltage-drop circuit operates under the control of a control signal supplied to said second bonding pad.
Claim 8
Dependent Claim
39 words
The static random access memory according to claim 5, wherein a control signal generating circuit having a fuse is provided, and said voltage-drop circuit operates under the control of a control signal output by said control signal generating circuit.
Claim 9
Dependent Claim
94 words
A static random access memory comprising: an array of static memory cells each having resistors functioning as load elements; peripheral circuits for controlling the writing of data into, and the reading of data from, the static memory cells; a first power-supply voltage line for applying a first power-supply voltage to the memory cells of said array; a second power-supply voltage line for applying a first power-supply voltage to the peripheral circuits; a first bonding pad connected to the first power-supply voltage line; and a second bonding pad connected to the second power-supply voltage line.
Claim 10
Dependent Claim
94 words
A static random access memory comprising: an array of static memory cells each having resistors functioning as load elements; peripheral circuits for controlling the writing of data into, and the reading of data from, the static memory cells; a first power-supply voltage line for applying a first power-supply voltage to the memory cells of said array; a second power-supply voltage line for applying a first power-supply voltage to the peripheral circuits; a first bonding pad connected to the first power-supply voltage line; and a second bonding pad connected to the second power-supply voltage line.
Claim 11
Dependent Claim
29 words
The static random access memory according to claim 8, wherein a voltage lower than the voltage applied to said first bonding pad is supplied to said second bonding pad.
References Cited (Backward Citations)
US4794571A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-02-12 | 1993-08-14 | 1994-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-12 | 1997-08-14 | 1998-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-12 | 2001-08-14 | 2002-02-13 | $7700.00 | Window Closed / Lapsed |