JPS55136704A - Generation circuit of digital sinusoidal wave - Google Patents

Generation circuit of digital sinusoidal wave

Info

Publication number
JPS55136704A
JPS55136704A JP4465879A JP4465879A JPS55136704A JP S55136704 A JPS55136704 A JP S55136704A JP 4465879 A JP4465879 A JP 4465879A JP 4465879 A JP4465879 A JP 4465879A JP S55136704 A JPS55136704 A JP S55136704A
Authority
JP
Japan
Prior art keywords
modulas
rom4
rom3
register
content
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
JP4465879A
Other languages
Japanese (ja)
Other versions
JPS6334641B2 (en
Inventor
Takao Nishitani
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 JP4465879A priority Critical patent/JPS55136704A/en
Publication of JPS55136704A publication Critical patent/JPS55136704A/en
Publication of JPS6334641B2 publication Critical patent/JPS6334641B2/ja
Granted 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
    • G06F1/0321—Waveform generators, i.e. devices for generating periodical functions of time, e.g. direct digital synthesizers
    • G06F1/0328—Waveform generators, i.e. devices for generating periodical functions of time, e.g. direct digital synthesizers in which the phase increment is adjustable, e.g. by using an adder-accumulator

Landscapes

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

Abstract

PURPOSE:To improve the digital signal generator in which desired frequencies can accurately be obtained if an integer ratio is established between the advance clock and the fundamental frequency, by adding or replacing a simple hardware in addition to the conventional method of 2N as modulas. CONSTITUTION:Taking the address of the modulas M operation ROM3 as i and the content as k, these relations are k=1 when i<k and k=i-M when M<=i<2M. Further, the relation between the address i and the content k of the sinusoidal wave ROM4 is k=sin(2pii/M). The number of words of ROMs 3, 4 is 2M. The output of the modulas M operation ROM3 addresses with the content of the register 2 and the harmonics designation input from the terminal 5 are added with each other, and the result is given to the register 2 receiving the advance clock from the terminal 7. The output of the register 2 is added to ROM3 and also fed to the sinusoidal ROM4. ROM4 outputs sin(2piki/M).
JP4465879A 1979-04-12 1979-04-12 Generation circuit of digital sinusoidal wave Granted JPS55136704A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4465879A JPS55136704A (en) 1979-04-12 1979-04-12 Generation circuit of digital sinusoidal wave

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4465879A JPS55136704A (en) 1979-04-12 1979-04-12 Generation circuit of digital sinusoidal wave

Publications (2)

Publication Number Publication Date
JPS55136704A true JPS55136704A (en) 1980-10-24
JPS6334641B2 JPS6334641B2 (en) 1988-07-12

Family

ID=12697537

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4465879A Granted JPS55136704A (en) 1979-04-12 1979-04-12 Generation circuit of digital sinusoidal wave

Country Status (1)

Country Link
JP (1) JPS55136704A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6018005A (en) * 1983-07-12 1985-01-30 Nec Corp Digital oscillating circuit

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IBM TECHNICAL DISCLOSURE BULLETIN=1978 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6018005A (en) * 1983-07-12 1985-01-30 Nec Corp Digital oscillating circuit

Also Published As

Publication number Publication date
JPS6334641B2 (en) 1988-07-12

Similar Documents

Publication Publication Date Title
JPS5619506A (en) Code converting method
JPS55136704A (en) Generation circuit of digital sinusoidal wave
KR890011192A (en) Digital FM Demodulator
JPS55162679A (en) Sampling clock reproducing unit
JPS5383609A (en) Wave generator for electronic musical instruments
Nowak Linear phase digital filter design
Doorenbosch A monolithically integrated wide-tunable sine oscillator
JPS55150028A (en) Clock circuit for digital operation processor
SU568164A1 (en) Shf mixer
Dvornikov et al. A case of joint operation of many oscillators
JPS5241829A (en) Inverter apparatus
SU780147A1 (en) Frequency multiplier
JPS6434004A (en) Digital frequency generator
SU853817A1 (en) Frequency manipulator
JPS54148576A (en) Frequency calibrator
Krivosheykin et al. Analysis of operation of frequency synthesizer of television receiver with micro-electronic computer in a control circuit
BASHKIROV Possibilities of synthesizing circuits from modules for the engineering and logic design of digital devices
JPS51112259A (en) Thyristor gate circuit utilizing third harmonic wave voltage
JPS56114443A (en) High frequency variable phase signal generation equipment
JPS5690694A (en) Key signal setting method of electronic equipment
JPS5467471A (en) Electronic watch with receiver
Kanmuri et al. Millimeter-wave signal generator
Gurevich et al. Nonsinusoidal regimes of an oscillator based on a multifrequency SAW resonator
JPS5323216A (en) Higher harmonic generat ing circuit
Hewison et al. Frequency tuneable ring wave pulser