Patent US3588844A successfully refreshed from Google Patents.
US3588844A
Expired / Lapsed
US
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Sense amplifier for single device per bit mosfet memories
Assignee: Shell USA Inc
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Filing: 1969-07-07
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Granted: 1971-06-28
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Expires: 1989-07-07
Abstract
Abstract A HIGHLY EFFICIENT SENSE AMPLIFIER FOR METAL OXIDE CHIP MEMORY ARRAYS CAN BE BUILT BY USING A PAIR OF CROSS-COUPLED SENSING MOSFETS CONNECTED IN A RACING MODE BETWEEN A BIT LINE CAPACITANCE AND A PRECHARGE STORAGE CAPACITANCE TO PRODUCE A FULL "1" OR FULL-"0" BIT LINE CONDITION RESPONSIVE TO THE CAPACITIVE INFORMATION CHARGE STORED IN AN ADDRESSED BIT, AND TRANSFERRED TO THE BIT LINE WHICH CONDITION CAN SERVE BOTH AS A RESTORNIG SIGNAL AND AS A READOUT SIGNAL. BIT LINE CAPACITANCE CAN BE REDUCED, AND A SEPARATE PRECHARGE STORAGE CAPACITANCE ELIMINATED, BY CONNECTING EACH OF THE CROSS-COUPLED MOSFETS TO HALF OF THE BIT LINE, AND USING THE PRECHARGE STORAGE CAPACITANCE.
Inventors
- 👤 Alton O Christensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:06
CPC Classifications
G; G11; G11C; G11C11/00; G11C11/21; G11C11/34; G11C11/40; G11C11/401; G11C11/4063; G11C11/407; G11C11/409; G11C11/4094; G11C11/403; G11C11/404; G11C11/4091; H; H03; H03K; H03K3/00; H03K3/02; H03K3/353; H03K3/356; H03K3/356017; H03K3/356052; H03K3/35606
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |