GB972843A - Improvements in or relating to electric logical circuits - Google Patents

Improvements in or relating to electric logical circuits

Info

Publication number
GB972843A
GB972843A GB3891161A GB3891161A GB972843A GB 972843 A GB972843 A GB 972843A GB 3891161 A GB3891161 A GB 3891161A GB 3891161 A GB3891161 A GB 3891161A GB 972843 A GB972843 A GB 972843A
Authority
GB
United Kingdom
Prior art keywords
circuit
diodes
relating
potential
logical 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
GB3891161A
Inventor
Raymond William Clarke
John Anthony Weaver
Dennis Brian Jarvis
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.)
Philips Components Ltd
Original Assignee
Mullard Ltd
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 to BE623191D priority Critical patent/BE623191A/xx
Priority to GB3575861A priority patent/GB970549A/en
Priority claimed from GB3575861A external-priority patent/GB970549A/en
Application filed by Mullard Ltd filed Critical Mullard Ltd
Priority to DEN22156A priority patent/DE1170465B/en
Priority to CH1152862A priority patent/CH410055A/en
Priority to FR911193A priority patent/FR1335752A/en
Publication of GB972843A publication Critical patent/GB972843A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
    • G06F7/38—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation
    • G06F7/48—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation using non-contact-making devices, e.g. tube, solid state device; using unspecified devices
    • G06F7/50—Adding; Subtracting
    • G06F7/501—Half or full adders, i.e. basic adder cells for one denomination
    • G06F7/502—Half adders; Full adders consisting of two cascaded half adders

Abstract

972, 843. Electronic binary half adders. MULLARD Ltd. Aug. 14, 1962 [Oct. 31, 1961; Dec.11, 1961],Nos.38911/61 and 44234/61. Heading G4A. [Also in Division H3] The "exclusive OR" circuit of Specification 887,933, is modified by the addition of a pair of catching diodes D1, D2 as described in Specification 970,549 and is combined with an AND circuit to form a half adder of the type described in Specification 895,909. The catching diodes permit faster operation and also provide additional current paths in parallel with the AND circuit T3, T4 so that the carry output may be reduced from two units to a more convenient value, adjustment of the value being made by means of resistors R5, R6. The D.C. potential to which the diodes are connected may be either a potential + V d as shown, Fig. 2, or may be earthed, Fig. 1 (not shown).
GB3891161A 1961-10-04 1961-10-31 Improvements in or relating to electric logical circuits Expired GB972843A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BE623191D BE623191A (en) 1961-10-04
GB3575861A GB970549A (en) 1961-10-04 1961-10-04 Improvements in or relating to electric logical circuits
DEN22156A DE1170465B (en) 1961-10-04 1962-09-29 íÀExclusive-Oderí gate with two inputs and its use in a half adder
CH1152862A CH410055A (en) 1961-10-04 1962-10-01 Exclusive-or-gate
FR911193A FR1335752A (en) 1961-10-04 1962-10-03 Gate <or exclusive> and half-adder equipped with such a gate

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB3575861A GB970549A (en) 1961-10-04 1961-10-04 Improvements in or relating to electric logical circuits
GB4423361 1961-12-11
GB4423461 1962-08-03

Publications (1)

Publication Number Publication Date
GB972843A true GB972843A (en) 1964-10-21

Family

ID=27259309

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3891161A Expired GB972843A (en) 1961-10-04 1961-10-31 Improvements in or relating to electric logical circuits

Country Status (1)

Country Link
GB (1) GB972843A (en)

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