JPS5576442A - Binary coded data adder circuit - Google Patents

Binary coded data adder circuit

Info

Publication number
JPS5576442A
JPS5576442A JP14794578A JP14794578A JPS5576442A JP S5576442 A JPS5576442 A JP S5576442A JP 14794578 A JP14794578 A JP 14794578A JP 14794578 A JP14794578 A JP 14794578A JP S5576442 A JPS5576442 A JP S5576442A
Authority
JP
Japan
Prior art keywords
circuits
plus
coded data
binary coded
rank
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.)
Pending
Application number
JP14794578A
Other languages
Japanese (ja)
Inventor
Hideo Maejima
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.)
Hitachi Ltd
Original Assignee
Hitachi 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
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP14794578A priority Critical patent/JPS5576442A/en
Publication of JPS5576442A publication Critical patent/JPS5576442A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To ensure a high-speed and highly expansible operation by delivering only the addition result through the adder circuit, supplying the corresponding binary coded data to be added plus the carry signal sent from the lower-rank digit in order to deliver the presence or absence of the carry signal to the higher-rank digit.
CONSTITUTION: Adder circuits 31W34 plus carry signal generator circuits 35W38 are divided with every 4 bits, and addition data A0WA15 plus B0WB15 are supplied to circuits 31W34 plus 35W38 each. Here circuits 31W34 supply the carry signals from the lower-rank digits plus the corresponding binary coded data to be added to carry out the addition and then to deliver only the addition result. While circuits 35W38 supply the corresponding binary coded data to be added plus the carry signals given from the lower-rank digits to deliver the presence or absence of the carry signal to the higher-rank digit. In this way, the number of the logic gate steps can be reduced as a whole for circuits 31W34, and the propagation length is reduced for the carry signal. As a result, the operation featuring a high speed and high expansibility can be realized.
COPYRIGHT: (C)1980,JPO&Japio
JP14794578A 1978-12-01 1978-12-01 Binary coded data adder circuit Pending JPS5576442A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14794578A JPS5576442A (en) 1978-12-01 1978-12-01 Binary coded data adder circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14794578A JPS5576442A (en) 1978-12-01 1978-12-01 Binary coded data adder circuit

Publications (1)

Publication Number Publication Date
JPS5576442A true JPS5576442A (en) 1980-06-09

Family

ID=15441608

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14794578A Pending JPS5576442A (en) 1978-12-01 1978-12-01 Binary coded data adder circuit

Country Status (1)

Country Link
JP (1) JPS5576442A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60179840A (en) * 1984-02-08 1985-09-13 Yokogawa Hewlett Packard Ltd Adder

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4951837A (en) * 1972-09-20 1974-05-20
JPS503549A (en) * 1973-05-14 1975-01-14

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4951837A (en) * 1972-09-20 1974-05-20
JPS503549A (en) * 1973-05-14 1975-01-14

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60179840A (en) * 1984-02-08 1985-09-13 Yokogawa Hewlett Packard Ltd Adder

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