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US4257008A Expired / Lapsed US ⏱️ 0.0 years remaining

Logic circuit building block and systems constructed from same

Assignee: RICHARD S WEINSTEIN TRUSTEE
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Filing: 1977-11-17
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Granted: 1981-03-17
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Expires: 1997-11-17
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Abstract

Abstract A logic system includes first and second identical logic circuit building blocks, each referred to as an M Circuit, which responds to transitions of a two level, binary input signal to provide a memory and a logic function which has a complete truth table for every possible combination of input signal transitions or changes in logic level at a pair of input terminals A and B. Each of the M Circuits includes gates having two inputs connected to the A and B input terminals, respectively and a set-reset flip flop having its set input connected to the output of the gate, its reset input connected to the B input terminal and its set and reset outputs connected respectively to output terminals Q and Q of the M Circuit, with the Q and Q output terminals providing complementary binary outputs for any combination of binary inputs applied at the A and B input terminals, providing a four terminal device which responds to each transition of said input signal at the A and B terminals to provide outputs at the Q and Q terminals in accordance with its truth table functions. One of the Q and Q output terminals of the first M Circuit is connected with one of the A and B input terminals of the second M Circuit.

Inventors

  • 👤 Joseph Shepter

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-25 12:11
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/027; H03K3/037; H03K19/00; H03K19/02; H03K19/173

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 225 words
A logic system comprising first and second identical logic circuit building blocks, each referred to as an M Circuit, which responds to transitions of a two level, binary input signal to provide a memory and a logic function which has a complete truth table for every possible combination of input signal transitions or changes in logic level at a pair of input terminals A and B, each of said M Circuits comprising: gating means having two inputs connected to said A and B input terminals, respectively; and a set-reset flip flop means having its set input connected to the output of said gating means, its reset input connected to said B input terminal and its set and reset outputs connected respectively to output terminal Q and Q of said M Circuit, said Q and Q output terminals providing complementary binary outputs for any combination of binary inputs applied at said A and B input terminals, whereby said M Circuit is a four terminal device which responds to each transition of said input signal at said A and B terminals to provide outputs at said Q and Q terminals in accordance with its truth table function; and means interconnecting one of said Q and Q output terminals of said first M Circuit with one of said A and B input terminals of said second M Circuit.
Claim 2
Dependent Claim 225 words
A logic system comprising first and second identical logic circuit building blocks, each referred to as an M Circuit, which responds to transitions of a two level, binary input signal to provide a memory and a logic function which has a complete truth table for every possible combination of input signal transitions or changes in logic level at a pair of input terminals A and B, each of said M Circuits comprising: gating means having two inputs connected to said A and B input terminals, respectively; and a set-reset flip flop means having its set input connected to the output of said gating means, its reset input connected to said B input terminal and its set and reset outputs connected respectively to output terminal Q and Q of said M Circuit, said Q and Q output terminals providing complementary binary outputs for any combination of binary inputs applied at said A and B input terminals, whereby said M Circuit is a four terminal device which responds to each transition of said input signal at said A and B terminals to provide outputs at said Q and Q terminals in accordance with its truth table function; and means interconnecting one of said Q and Q output terminals of said first M Circuit with one of said A and B input terminals of said second M Circuit.
Claim 3
Dependent Claim 41 words
System as recited in claim 1 wherein said means interconnecting one of said Q and Q output terminals of said first M Circuit with one of said A and B input terminals of said second M Circuit comprises a delay means.
Claim 4
Dependent Claim 41 words
System as recited in claim 1 wherein said means interconnecting one of said Q and Q output terminals of said first M Circuit with one of said A and B input terminals of said second M Circuit comprises a feedback network.
Claim 5
Dependent Claim 67 words
System as recited in claim 1 wherein a first one of said M Circuits is connected to a second one of said M Circuits by means connecting the B input terminal of said second M Circuit to one of the Q and Q outputs of said first M Circuit whereby said second M Circuit may be reset or enabled to be set by said first M Circuit.
Claim 6
Dependent Claim 26 words
System as recited in claim 1, wherein the Q terminal of a first M Circuit is coupled to the A terminal of a second M Circuit.
Claim 7
Dependent Claim 26 words
System as recited in claim 1, wherein the Q terminal of a first M Circuit is coupled to the A terminal of a second M Circuit.

References Cited (Backward Citations)

US3778794A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1984-03-16 1984-09-15 1985-03-17 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1988-03-16 1988-09-15 1989-03-17 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1992-03-16 1992-09-15 1993-03-17 $7700.00 Window Closed / Lapsed

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