JPS5640930A - Function value generator - Google Patents

Function value generator

Info

Publication number
JPS5640930A
JPS5640930A JP11756579A JP11756579A JPS5640930A JP S5640930 A JPS5640930 A JP S5640930A JP 11756579 A JP11756579 A JP 11756579A JP 11756579 A JP11756579 A JP 11756579A JP S5640930 A JPS5640930 A JP S5640930A
Authority
JP
Japan
Prior art keywords
register
function value
input
calculation
input variable
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
JP11756579A
Other languages
Japanese (ja)
Other versions
JPS633329B2 (en
Inventor
Yoshihiro Kasuya
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP11756579A priority Critical patent/JPS5640930A/en
Publication of JPS5640930A publication Critical patent/JPS5640930A/en
Publication of JPS633329B2 publication Critical patent/JPS633329B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/02—Digital function generators
    • G06F1/03—Digital function generators working, at least partly, by table look-up
    • G06F1/035—Reduction of table size

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Complex Calculations (AREA)

Abstract

PURPOSE:To restore the function value to the original input variable, by dividing the binary input signals showing the input variable into several groups, storing the function value to the input signals belonging to each group and then giving a repetitive calculation to the function value. CONSTITUTION:The signals 101 showing the input variable are divided into several groups by the register 1, and the bit 102 in the lower-rank group of the register 1 is supplied to the memory device 3. And the output 301 of the device 3 is applied to the function value calculator 4. The calculation output 401 is stored repetitively in the storing register 5 in the form of the result of calculation. The control pulse input 601 is applied to the register 1; and at the same time the carry signal 602 is produced at the counter 6 and then applied to the delaying circuit via the OR circuit 7 to be supplied to the register 5 as the set input. In this way, the capacity of the device 3 can be reduced to secure a high-speed generation of the function.
JP11756579A 1979-09-13 1979-09-13 Function value generator Granted JPS5640930A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11756579A JPS5640930A (en) 1979-09-13 1979-09-13 Function value generator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11756579A JPS5640930A (en) 1979-09-13 1979-09-13 Function value generator

Publications (2)

Publication Number Publication Date
JPS5640930A true JPS5640930A (en) 1981-04-17
JPS633329B2 JPS633329B2 (en) 1988-01-22

Family

ID=14714952

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11756579A Granted JPS5640930A (en) 1979-09-13 1979-09-13 Function value generator

Country Status (1)

Country Link
JP (1) JPS5640930A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003099244A (en) * 2001-09-26 2003-04-04 Sony Corp Arithmetic device and arithmetic method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4942253A (en) * 1972-03-06 1974-04-20
JPS4977546A (en) * 1972-11-27 1974-07-26
JPS513143A (en) * 1974-06-25 1976-01-12 Nippon Soken

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4942253A (en) * 1972-03-06 1974-04-20
JPS4977546A (en) * 1972-11-27 1974-07-26
JPS513143A (en) * 1974-06-25 1976-01-12 Nippon Soken

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003099244A (en) * 2001-09-26 2003-04-04 Sony Corp Arithmetic device and arithmetic method

Also Published As

Publication number Publication date
JPS633329B2 (en) 1988-01-22

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