JPS5772424A - Digital-analogue converter - Google Patents

Digital-analogue converter

Info

Publication number
JPS5772424A
JPS5772424A JP14770980A JP14770980A JPS5772424A JP S5772424 A JPS5772424 A JP S5772424A JP 14770980 A JP14770980 A JP 14770980A JP 14770980 A JP14770980 A JP 14770980A JP S5772424 A JPS5772424 A JP S5772424A
Authority
JP
Japan
Prior art keywords
signal
tau
pulse
digital
pulse signal
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
JP14770980A
Other languages
Japanese (ja)
Inventor
Eisaku Yamada
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.)
Komatsu Ltd
Original Assignee
Komatsu 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 Komatsu Ltd filed Critical Komatsu Ltd
Priority to JP14770980A priority Critical patent/JPS5772424A/en
Publication of JPS5772424A publication Critical patent/JPS5772424A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/66—Digital/analogue converters

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Analogue/Digital Conversion (AREA)

Abstract

PURPOSE:To convert an input digital signal to a smooth analogue waveform without break points in a high speed, by utilizing the probability stastical processing. CONSTITUTION:A spurious random pulse signal (x) of the same number of bits (N-number bits) as a digital signal inputted to a D-A converter is generated at an output period tau by a spurious random signal generator 2, and an amplitude probability density function P(x) of the pulse signal (x) is made constant. This pulse signal (x) is latched in a latch circuit 3 at every tau and is applied to a digital comparator 1 surely in every pulse. The comparator 1 compares the pulse signal (x) and a sample value f(iTs), which is obtained by sampling an input digital signal f(t) at a sample period Ts(>>tau), with each other for every bit, and outputs a high- level signal under the condition of x<f(iTs). This output signal is converted to an analogue signal corresponding to the input digital through a filter 4 consisting of an integrating circuit.
JP14770980A 1980-10-22 1980-10-22 Digital-analogue converter Pending JPS5772424A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14770980A JPS5772424A (en) 1980-10-22 1980-10-22 Digital-analogue converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14770980A JPS5772424A (en) 1980-10-22 1980-10-22 Digital-analogue converter

Publications (1)

Publication Number Publication Date
JPS5772424A true JPS5772424A (en) 1982-05-06

Family

ID=15436439

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14770980A Pending JPS5772424A (en) 1980-10-22 1980-10-22 Digital-analogue converter

Country Status (1)

Country Link
JP (1) JPS5772424A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60128719A (en) * 1983-12-16 1985-07-09 Toshiba Corp Digital-analog converter
JPH02183627A (en) * 1989-01-09 1990-07-18 Yokogawa Electric Corp D/a converter
JPH06311040A (en) * 1993-04-26 1994-11-04 Jeco Co Ltd Pulse width modulation circuit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4919931A (en) * 1972-06-15 1974-02-21

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4919931A (en) * 1972-06-15 1974-02-21

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60128719A (en) * 1983-12-16 1985-07-09 Toshiba Corp Digital-analog converter
JPH02183627A (en) * 1989-01-09 1990-07-18 Yokogawa Electric Corp D/a converter
JPH06311040A (en) * 1993-04-26 1994-11-04 Jeco Co Ltd Pulse width modulation circuit

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