US3573485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Computer memory storage device
Assignee: UTAH COMPUTER INDUSTRIES Inc A CORP OF DE
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Filing: 1968-06-24
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Granted: 1971-04-06
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Expires: 1988-06-24
Abstract
Abstract A flip-flop circuit is formed with a pair of active electronicswitching elements. Connected in circuit with at least one of these switching elements as an impedance coupler is a passive storage element. A digital signal to be stored is written into the passive storage element, thereby changing its effective impedance in the circuit. The readout signal is obtained from the electronic-switching elements by providing power to such active switching elements in response to a readout address, the electronic-switching elements assuming a conductive or nonconductive state in accordance with the effective circuit impedance of the associated passive storage element.
Inventors
- 👤 Delbert L Ballard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:14
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/26; H03K3/30; G; G11; G11C; G11C11/00; G11C11/02; G11C11/06; G11C11/06007; G11C11/06014; G11C11/0605; G11C11/21; G11C11/34; G11C11/40; G11C11/41; G11C11/411; G11C14/00; G11C7/00; G11C7/20; H03K3/01; H03K3/012; H03K3/353
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
160 words
In a flip-flop circuit, said flip-flop circuit comprising a pair of electronic switches; passive storage element means connected to provide a flip-flop cross-coupling path between said switches; a power source for providing current to said switches, said storage element means not being in series with the switch current path between said power source and said switches; means for providing a signal to be stored to said storage element means; a switching device interposed between said power source and said electronic switches; means for providing a readout signal to said switching device to activate one of said electronic switches at a time to cause current flow therethrough from said power source in response to said signal, said current flow not passing through said storage element means; and whereby a particular one of said switches is activated in accordance with the polarity of said stored signal and said storage element means can store a signal independently of the activation of said switches.
Claim 2
Dependent Claim
160 words
In a flip-flop circuit, said flip-flop circuit comprising a pair of electronic switches; passive storage element means connected to provide a flip-flop cross-coupling path between said switches; a power source for providing current to said switches, said storage element means not being in series with the switch current path between said power source and said switches; means for providing a signal to be stored to said storage element means; a switching device interposed between said power source and said electronic switches; means for providing a readout signal to said switching device to activate one of said electronic switches at a time to cause current flow therethrough from said power source in response to said signal, said current flow not passing through said storage element means; and whereby a particular one of said switches is activated in accordance with the polarity of said stored signal and said storage element means can store a signal independently of the activation of said switches.
Claim 3
Dependent Claim
30 words
The circuit of claim 1 wherein a storage element is connected in circuit with each of said switches and said signal is stored in said elements in opposite polarity relationship.
Claim 4
Dependent Claim
16 words
The circuit of claim 1 wherein said storage elements Comprise at least one ferromagnetic storage member.
Claim 5
Dependent Claim
36 words
The circuit of claim 1 wherein said storage elements comprise a single magnetic core having a write winding and first and second storage windings, said storage windings forming the storage elements in conjunction with said core.
Claim 6
Dependent Claim
26 words
The circuit of claim 1 wherein said storage elements comprise separate magnetic cores, each of said cores having a separate write winding and storage winding thereon.
Claim 7
Dependent Claim
13 words
The circuit of claim 1 wherein said storage elements comprise ferroelectric storage devices.
Claim 8
Dependent Claim
30 words
The circuit of claim 1 wherein said flip-flop is biased so that it is preferentially stable, and said passive storage element means comprises a storage element connected between said switches.
Claim 9
Dependent Claim
28 words
The circuit of claim 1 wherein said electronic switches comprise a field effect transistors having dielectric layers formed of ferroelectric material, said dielectric layers forming passive storage elements.
Claim 10
Dependent Claim
155 words
A memory storage device comprising: a pair of electronic switches connected in a flip-flop configuration; a passive storage element connected in circuit with each of said switches in symmetrical fashion, each of said storage elements forming an impedance in a current path of its associated switch; means for providing a write signal from an external source directly to both of said storage elements, a signal being stored in one of said storage elements in a polarity opposite to that stored in the other of said storage elements; a power source; switching means interposed between said power source and said electronic switches; means for providing a readout address signal to said switching means to cause the activation thereof and provide power therethrough from said power source to activate said flip-flop; and whereby one or the other of said flip-flop switches will be activated in accordance with polarities of the signals stored in said passive storage elements.
Claim 11
Dependent Claim
155 words
A memory storage device comprising: a pair of electronic switches connected in a flip-flop configuration; a passive storage element connected in circuit with each of said switches in symmetrical fashion, each of said storage elements forming an impedance in a current path of its associated switch; means for providing a write signal from an external source directly to both of said storage elements, a signal being stored in one of said storage elements in a polarity opposite to that stored in the other of said storage elements; a power source; switching means interposed between said power source and said electronic switches; means for providing a readout address signal to said switching means to cause the activation thereof and provide power therethrough from said power source to activate said flip-flop; and whereby one or the other of said flip-flop switches will be activated in accordance with polarities of the signals stored in said passive storage elements.
Claim 12
Dependent Claim
20 words
The device of claim 9 wherein said storage elements are connected between the switches to provide the flip-flop cross-coupling circuits.
Claim 13
Dependent Claim
10 words
The device of claim 10 wherein said switches comprise transistors.
Claim 14
Dependent Claim
13 words
The device of claim 10 wherein said storage elements comprise ferroelectric storage devices.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |