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JPS56110120A - Sine function generator - Google Patents

Sine function generator

Info

Publication number
JPS56110120A
JPS56110120A JP1261480A JP1261480A JPS56110120A JP S56110120 A JPS56110120 A JP S56110120A JP 1261480 A JP1261480 A JP 1261480A JP 1261480 A JP1261480 A JP 1261480A JP S56110120 A JPS56110120 A JP S56110120A
Authority
JP
Japan
Prior art keywords
sine function
phase
becomes
input
circuit
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
JP1261480A
Other languages
Japanese (ja)
Other versions
JPS6037486B2 (en
Inventor
Katsumi Kobayashi
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP55012614A priority Critical patent/JPS6037486B2/en
Publication of JPS56110120A publication Critical patent/JPS56110120A/en
Publication of JPS6037486B2 publication Critical patent/JPS6037486B2/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR 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
    • G06F1/0353—Reduction of table size by using symmetrical properties of the function, e.g. using most significant bits for quadrant control

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

PURPOSE:To make it possible to reduce the memory capacity by generating a sine function by use of the ROM whose phase range for storing the sine function has been made to 1/4 of one period. CONSTITUTION:When the input of l bits of the phase (x) (-pi<=x<pi) is input to the circuit of operation I, the phase is moved in parallel, it becomes -pi/2<=y< pi/2, and becomes 1/2 of the area of (x). Subsequently, when this phase is input to the circuit of operation II and is inverted partially, it becomes 0<=z<=pi/2, and becomes 1/2 of the area of (y). A since function can be obtained by reading it out from the ROM11 storing the sine function within the range which is ''0'' or more and smaller than pi/2, by use of said phase. When it is inverted again by the circuit of operation III, a desired sine function can be obtained. In this way, the memory capacity of the ROM11 can be reduced to 1/4.
JP55012614A 1980-02-05 1980-02-05 sine function generator Expired JPS6037486B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55012614A JPS6037486B2 (en) 1980-02-05 1980-02-05 sine function generator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55012614A JPS6037486B2 (en) 1980-02-05 1980-02-05 sine function generator

Publications (2)

Publication Number Publication Date
JPS56110120A true JPS56110120A (en) 1981-09-01
JPS6037486B2 JPS6037486B2 (en) 1985-08-27

Family

ID=11810247

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55012614A Expired JPS6037486B2 (en) 1980-02-05 1980-02-05 sine function generator

Country Status (1)

Country Link
JP (1) JPS6037486B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01181115A (en) * 1988-01-14 1989-07-19 Matsushita Electric Ind Co Ltd Trigonometric function generating circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01181115A (en) * 1988-01-14 1989-07-19 Matsushita Electric Ind Co Ltd Trigonometric function generating circuit

Also Published As

Publication number Publication date
JPS6037486B2 (en) 1985-08-27

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