JPS5664533A - A/d d/a converter - Google Patents

A/d d/a converter

Info

Publication number
JPS5664533A
JPS5664533A JP13933779A JP13933779A JPS5664533A JP S5664533 A JPS5664533 A JP S5664533A JP 13933779 A JP13933779 A JP 13933779A JP 13933779 A JP13933779 A JP 13933779A JP S5664533 A JPS5664533 A JP S5664533A
Authority
JP
Japan
Prior art keywords
circuit
pulse
division
phase difference
output
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
JP13933779A
Other languages
Japanese (ja)
Other versions
JPS6030136B2 (en
Inventor
Masao Yamazawa
Michinobu Ohata
Toshihiko Matsumura
Hisami Tanaka
Hideyuki Kurosawa
Masaaki Sasagawa
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.)
Fujitsu Ltd
Nippon Telegraph and Telephone Corp
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd, Nippon Telegraph and Telephone Corp filed Critical Fujitsu Ltd
Priority to JP54139337A priority Critical patent/JPS6030136B2/en
Publication of JPS5664533A publication Critical patent/JPS5664533A/en
Publication of JPS6030136B2 publication Critical patent/JPS6030136B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B14/00—Transmission systems not characterised by the medium used for transmission
    • H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
    • H04B14/04—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse code modulation
    • H04B14/044—Sample and hold circuits

Abstract

PURPOSE:To ensure an optional setting for the read and write clocks of an A/D. D/A converter, by varying the degree of division of a dividing means with the converting cycle indication pulse and then using the divided pulse obtained for the working clock. CONSTITUTION:The working clock producing part 8 at the A/D.D/A converting part 1 is a kind of digital PLL circuit, and includes the dividing circuit 12 which divides the basic clock pulse applied from the oscillating circuit 11, the phase difference detecting circuit 14 which generates the signal according to the phase difference between the output of the circuit 12 and the sampling pulse, and control signal generating circuit 15 which controls the division ratio of the circuit 12 according to the output of the circuit 14 respectively. The division ratio of the circuit 12 is selected in accordance with the desired number of division of the sampling pulse.
JP54139337A 1979-10-30 1979-10-30 A/D/D/A converter Expired JPS6030136B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54139337A JPS6030136B2 (en) 1979-10-30 1979-10-30 A/D/D/A converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54139337A JPS6030136B2 (en) 1979-10-30 1979-10-30 A/D/D/A converter

Publications (2)

Publication Number Publication Date
JPS5664533A true JPS5664533A (en) 1981-06-01
JPS6030136B2 JPS6030136B2 (en) 1985-07-15

Family

ID=15242969

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54139337A Expired JPS6030136B2 (en) 1979-10-30 1979-10-30 A/D/D/A converter

Country Status (1)

Country Link
JP (1) JPS6030136B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63153549A (en) * 1986-08-21 1988-06-25 Fuji Photo Film Co Ltd Image recorder

Also Published As

Publication number Publication date
JPS6030136B2 (en) 1985-07-15

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