Patent US3609569A successfully refreshed from Google Patents.
US3609569A
Expired / Lapsed
US
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Logic system
Assignee: SOLID STATE SCIENT DEVICES COR
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Filing: 1970-07-09
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Granted: 1971-09-28
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Expires: 1990-07-09
Abstract
Abstract A single-phase master/slave flip-flop circuit combines a pair of flip-flop networks which are mathematical duals. Each network includes a pair of gates connected in flip-flop arrangement with the inverted output of each providing the network outputs and being fed back as an input to the other gate in the flip-flop pair. The flip-flop gates in one network are AND gates and one input of each is an OR gate. This sequence of gates is reversed in the other network. It is possible to have the networks arranged in either order. Each input gate receives as an input a signal common to all four input gates and at least one other input signal. Other input signals to the input gates of one network are the output signals of the other network. The network outputs of said one network provide system outputs. Input signals to the input gates of the other network are system inputs. This circuit is applicable to RST, D, T, JK, flip-flop circuits and modifications thereof.
Inventors
- 👤 Ronald C Todd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:25
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/027; H03K3/037; H03K3/0372
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
338 words
A system composed of two networks having three system inputs and two system outputs comprising a pair of first network OR gates, each having a pair of input terminals and an output terminal, a pair of first network inverters having input terminals connected to the respective output terminals of the first network OR gates and each, respectively, providing at its output terminal a first network output terminal and a feedback to an input terminal of the first network OR gate other than the one to which its input terminal is connected, a pair of first network AND gates, each having an output terminal connected to an input terminal of different ones of the first network OR gates and a pair of input terminals, one of which input terminals of each AND gate is a separate network input terminal and the other of which input terminals are both connected to a common system input, a pair of second network AND gates, each having a pair of input terminals and an output terminal, a pair of second network inverters having input terminals connected to the respective output terminals of the second network AND gates and each, respectively, providing at its output terminal a second network output terminal and a feedback to an input terminal of the second network AND gate other than the one to which its input terminal is connected, and a pair of second network OR gates, each having an output terminal connected to an input terminal of different ones of the second network AND gates and a pair of input terminals, one of which input terminals of each OR gate is a separate network input terminal and the other of which input terminals are both connected to a common system input, the network output terminals of one network being connected to the network input terminals of the other network and the network input terminals of said one network serving as the other system input terminals and the other network output terminals serving as the system output terminals.
Claim 2
Independent Claim
338 words
A system composed of two networks having three system inputs and two system outputs comprising a pair of first network OR gates, each having a pair of input terminals and an output terminal, a pair of first network inverters having input terminals connected to the respective output terminals of the first network OR gates and each, respectively, providing at its output terminal a first network output terminal and a feedback to an input terminal of the first network OR gate other than the one to which its input terminal is connected, a pair of first network AND gates, each having an output terminal connected to an input terminal of different ones of the first network OR gates and a pair of input terminals, one of which input terminals of each AND gate is a separate network input terminal and the other of which input terminals are both connected to a common system input, a pair of second network AND gates, each having a pair of input terminals and an output terminal, a pair of second network inverters having input terminals connected to the respective output terminals of the second network AND gates and each, respectively, providing at its output terminal a second network output terminal and a feedback to an input terminal of the second network AND gate other than the one to which its input terminal is connected, and a pair of second network OR gates, each having an output terminal connected to an input terminal of different ones of the second network AND gates and a pair of input terminals, one of which input terminals of each OR gate is a separate network input terminal and the other of which input terminals are both connected to a common system input, the network output terminals of one network being connected to the network input terminals of the other network and the network input terminals of said one network serving as the other system input terminals and the other network output terminals serving as the system output terminals.
Claim 3
Dependent Claim
30 words
The system of claim 1 in which the networks are so connected that the first network provides the system input terminals and the second networks provides the system output terminals.
Claim 4
Dependent Claim
30 words
The system of claim 1 in which the networks are so connected that the second network provides the system input terminals and the first network provides the system output terminals.
Claim 5
Dependent Claim
48 words
The system of claim 1 in which the separate network input terminals serving as system input terminals are connected together by a signal inverter so that the signal applied to one system input terminal is the inverted signal of the signal applied to the other system input terminal.
Claim 6
Dependent Claim
36 words
The system of claim 1 in which a toggling effect is achieved by feedback cross-coupling wherein a portion of each system of gates in series is connected back to the other system of gates in series.
Claim 7
Dependent Claim
31 words
The system of claim 5 in which the output terminals terminating one system of gates in series is coupled back to the system input terminals feeding the other gates in series.
Claim 8
Dependent Claim
26 words
The system of claim 5 in which additional system input terminals are provided to the same gate whose separate input terminals provide the system input terminals.
Claim 9
Dependent Claim
46 words
The system of claim 1 in which additional inputs are provided, respectively, for at least one of the first network OR gates and at least the corresponding one of the second network AND gates in the series with said at least one first network OR gates.
Claim 10
Dependent Claim
35 words
The system of claim 8 in which an inverter interconnects said at least one additional terminal so that a signal applied to one terminal is applied to the other terminal as the same signal inverted.
Claim 11
Dependent Claim
63 words
The system of claim 8 in which both first network OR gates and both second network AND gates have additional input terminals and inverters connect together the additional input terminals of those gaTes which are in series so that the signal applied to one additional terminal of the series is applied to the other of the same series as the same signal inverted.
Claim 12
Dependent Claim
46 words
The system of claim 1 in which an additional AND gate has its output connected as another input to each of the first network OR gates and an additional OR gate has its output connected as another input to each of the second network AND gates.
Claim 13
Dependent Claim
30 words
The system of claim 11 in which each additional input gate has two inputs receiving different combinations of two potential signals and the inverted signals of said two potential signals.
Claim 14
Dependent Claim
24 words
The system of claim 12 in which inverters are employed between terminals receiving respectively a signal and the inverted signal to accomplish said inversion.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |