GB1484946A - Logic circuit equivalent to a relay contact circuit - Google Patents

Logic circuit equivalent to a relay contact circuit

Info

Publication number
GB1484946A
GB1484946A GB3633474A GB3633474A GB1484946A GB 1484946 A GB1484946 A GB 1484946A GB 3633474 A GB3633474 A GB 3633474A GB 3633474 A GB3633474 A GB 3633474A GB 1484946 A GB1484946 A GB 1484946A
Authority
GB
United Kingdom
Prior art keywords
circuit
normally
relay
inverter
unit circuits
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3633474A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Naigai Industries Inc
Original Assignee
Naigai Industries Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP1973106631U external-priority patent/JPS5054047U/ja
Priority claimed from JP48134737A external-priority patent/JPS5086240A/ja
Application filed by Naigai Industries Inc filed Critical Naigai Industries Inc
Publication of GB1484946A publication Critical patent/GB1484946A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
    • H03K19/02—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components
    • H03K19/173—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits using specified components using elementary logic circuits as components

Abstract

1484946 Logic NAIGAI INDUSTRIES Inc 19 Aug 1974 [13 Sept 1973 29 Nov 1973] 36334/74 Heading G4H A logic circuit includes a plurality of unit circuits each comprising a NAND element having at least two input terminals and an inverter element connected to one input of the NAND element, the unit circuits being mounted on identical circuit boards and being interconnected in one of only two modes, wherein in one of the two modes the outputs of two unit circuits are connected to one another such that the two unit circuits are equivalent to two contact relays connected with their contacts in parallel and in the second mode the output from the NAND element of one unit circuit is connected to the inverter at the input of the NAND element of the second unit circuit such that the two unit circuits are equivalent to two contact relays connected with their contacts in series. The other input of each NAND corresponds to the coil of the relay and may include an inverter in series with it. A multi-contact relay is simulated by having the second-mentioned inputs to the NANDs connected in common, this common connection between supplied by a parallel circuit of two branches with one inverter in one branch and two inverters in series in the other branch, one branch or the other being used according as normally-open or normally-closed contacts are to be simulated. Terminals may be provided permitting connections to be inserted in use to give normally-closed or normally-open operation for all the NANDs or some normallyclosed and some normally-open, as desired. A capacitor may be inserted for delayed operation. The circuitry is implemented in integrated form on a stack of circuit boards which are interconnected. Each board simulates two (or one) multi-contact relays and includes a D.C. stabilized power supply circuit. Each board has indicators (LEDs) for the power supply and relay-analogues. An external mechanical switch may control the logic circuit via an interface circuit to eliminate contact chatter, the logic circuit controlling a relay, lamp, TRIAC or A.C. circuit, via an amplifier/driver.
GB3633474A 1973-09-13 1974-08-19 Logic circuit equivalent to a relay contact circuit Expired GB1484946A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1973106631U JPS5054047U (en) 1973-09-13 1973-09-13
JP48134737A JPS5086240A (en) 1973-11-29 1973-11-29

Publications (1)

Publication Number Publication Date
GB1484946A true GB1484946A (en) 1977-09-08

Family

ID=26446748

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3633474A Expired GB1484946A (en) 1973-09-13 1974-08-19 Logic circuit equivalent to a relay contact circuit

Country Status (3)

Country Link
DE (1) DE2442061C3 (en)
GB (1) GB1484946A (en)
IT (1) IT1021270B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0001700A1 (en) * 1977-10-12 1979-05-02 Cutler-Hammer World Trade, Inc. Controller programmable with logic instructions representative of circuit nodes and elements of a ladder diagram
EP0523747A1 (en) * 1986-03-11 1993-01-20 Fujitsu Limited Latch circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0001700A1 (en) * 1977-10-12 1979-05-02 Cutler-Hammer World Trade, Inc. Controller programmable with logic instructions representative of circuit nodes and elements of a ladder diagram
EP0523747A1 (en) * 1986-03-11 1993-01-20 Fujitsu Limited Latch circuit

Also Published As

Publication number Publication date
DE2442061A1 (en) 1975-04-17
IT1021270B (en) 1978-01-30
DE2442061C3 (en) 1980-01-24
DE2442061B2 (en) 1979-05-10

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19940818