US4499560A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-volatile flip-flop with a dynamic resetting
Assignee: POUR L'ETUDE ET LA FABRICATION DE CIRCUITS INTEGRES SPECIAUX Ste
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Filing: 1982-09-28
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Granted: 1985-02-12
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Expires: 2002-09-28
Abstract
Abstract A flip-flop further comprising two branches with MNOS elements serially connected with P channel MOS transistors for permitting a non-volatile storing of the information contained in a flip-flop at a chosen memorizing time. The memorizing of the state of the flip-flop can be made in a single cycle by raising the supply voltage of the device. In the same way, the resetting can be made in a single cycle by restoring abruptily the power voltage.
Inventors
- 👤 Jean-Michel Brice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:24
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/353; H03K3/356; H03K3/356008
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
169 words
A non-volatile storing flip-flop with a dynamic resetting comprising a classical MOS transistor flip-flop with complementary nodes Q and Q* connected between a supply voltage and a reference voltage, further comprising at least one storing branch, each of which comprises the serial connection of a non-volatile storing element (electrically programmable threshold voltage MOS transistor) and a capacitor, a terminal of each capacitor being connected to the supply voltage, one of the main terminals and the control terminal of the storing element of the first branch being connected respectively to the node Q and the node Q* and reciprocally as regards the storing elements of the second branch; and further comprising means for modifying the supply voltage between a first level permitting the normal operation of the flip-flop and a second level permitting to condition the storing elements for memorizing the state of the flip-flop, said means also permitting to modify abruptly the power voltage from zero to the first level, thereby automatically resetting the flip-flop in the memorized state.
Claim 2
Dependent Claim
169 words
A non-volatile storing flip-flop with a dynamic resetting comprising a classical MOS transistor flip-flop with complementary nodes Q and Q* connected between a supply voltage and a reference voltage, further comprising at least one storing branch, each of which comprises the serial connection of a non-volatile storing element (electrically programmable threshold voltage MOS transistor) and a capacitor, a terminal of each capacitor being connected to the supply voltage, one of the main terminals and the control terminal of the storing element of the first branch being connected respectively to the node Q and the node Q* and reciprocally as regards the storing elements of the second branch; and further comprising means for modifying the supply voltage between a first level permitting the normal operation of the flip-flop and a second level permitting to condition the storing elements for memorizing the state of the flip-flop, said means also permitting to modify abruptly the power voltage from zero to the first level, thereby automatically resetting the flip-flop in the memorized state.
Claim 3
Dependent Claim
15 words
A non-volatile storing flip-flop according to claim 1 wherein the classical flip-flop comprises complementary transistors.
Claim 4
Dependent Claim
15 words
A non-volatile storage flip-flop according to claim 1 wherein the classical flip-flop comprises enhanced/depleted transistors.
Claim 5
Dependent Claim
24 words
A non-volatile storing flip-flop according to claim 2 wherein the storing elements are of the MNOS type, with their substrate connected to their source.
Claim 6
Dependent Claim
19 words
A non-volatile storing flip-flop according to claim 3 wherein the storing elements are of the floating gate MOS type.
Claim 7
Dependent Claim
16 words
A non-volatile storing flip-flop according to claim 1 comprising two storing branches, the flip-flop being symmetrical.
Claim 8
Dependent Claim
48 words
A non-volatile storing flip-flop according to claim 1 comprising only one storing branch connected with one of the nodes of the flip-flop, the elements of the flip-flop connected to the other node by their drain/source connection occupying a larger surface than the elements connected to the first node.
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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) | 1988-02-12 | 1988-08-13 | 1989-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-12 | 1992-08-13 | 1993-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-12 | 1996-08-13 | 1997-02-12 | $7700.00 | Window Closed / Lapsed |