FR2444296A1 - Equality comparator for two multi bit signals - utilises negative logic gating circuits containing current switching logic - Google Patents

Equality comparator for two multi bit signals - utilises negative logic gating circuits containing current switching logic

Info

Publication number
FR2444296A1
FR2444296A1 FR7835124A FR7835124A FR2444296A1 FR 2444296 A1 FR2444296 A1 FR 2444296A1 FR 7835124 A FR7835124 A FR 7835124A FR 7835124 A FR7835124 A FR 7835124A FR 2444296 A1 FR2444296 A1 FR 2444296A1
Authority
FR
France
Prior art keywords
utilises
current switching
logic
gating circuits
bit signals
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.)
Granted
Application number
FR7835124A
Other languages
French (fr)
Other versions
FR2444296B3 (en
Inventor
Homer W Miller
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.)
Bull HN Information Systems Italia SpA
Bull HN Information Systems Inc
Original Assignee
Honeywell Information Systems Italia SpA
Honeywell Information Systems 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
Application filed by Honeywell Information Systems Italia SpA, Honeywell Information Systems Inc filed Critical Honeywell Information Systems Italia SpA
Priority to FR7835124A priority Critical patent/FR2444296A1/en
Publication of FR2444296A1 publication Critical patent/FR2444296A1/en
Application granted granted Critical
Publication of FR2444296B3 publication Critical patent/FR2444296B3/fr
Granted 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
    • G06F7/02—Comparing digital values

Abstract

The equality comparator for 17 bits utilises negative logic in conjunction with current switching logic. This reduces power consumption and improves the speed of calculations. It comprises a number of exclusive or gates (601-617) each containing an emitter follower and upper and lower level gating circuits. The input signals (A1-17, B1-17) to the gates represent the two 17 bit words being compared. The gate output signals (01-17) represent the results of the individual comparisons and these are combined in groups of wire and circuits before being applied to the inputs of a four input AND gate (618). The gate outputs (619, 620) become logic high and low respectively when the signals are equal.
FR7835124A 1978-12-13 1978-12-13 Equality comparator for two multi bit signals - utilises negative logic gating circuits containing current switching logic Granted FR2444296A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7835124A FR2444296A1 (en) 1978-12-13 1978-12-13 Equality comparator for two multi bit signals - utilises negative logic gating circuits containing current switching logic

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7835124A FR2444296A1 (en) 1978-12-13 1978-12-13 Equality comparator for two multi bit signals - utilises negative logic gating circuits containing current switching logic

Publications (2)

Publication Number Publication Date
FR2444296A1 true FR2444296A1 (en) 1980-07-11
FR2444296B3 FR2444296B3 (en) 1981-10-02

Family

ID=9216074

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7835124A Granted FR2444296A1 (en) 1978-12-13 1978-12-13 Equality comparator for two multi bit signals - utilises negative logic gating circuits containing current switching logic

Country Status (1)

Country Link
FR (1) FR2444296A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0533996A1 (en) * 1991-09-27 1993-03-31 Siemens Aktiengesellschaft Integrated semi-conductor memory circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0533996A1 (en) * 1991-09-27 1993-03-31 Siemens Aktiengesellschaft Integrated semi-conductor memory circuit

Also Published As

Publication number Publication date
FR2444296B3 (en) 1981-10-02

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