JPS5690623A - Delta modulation code decoder - Google Patents

Delta modulation code decoder

Info

Publication number
JPS5690623A
JPS5690623A JP16798079A JP16798079A JPS5690623A JP S5690623 A JPS5690623 A JP S5690623A JP 16798079 A JP16798079 A JP 16798079A JP 16798079 A JP16798079 A JP 16798079A JP S5690623 A JPS5690623 A JP S5690623A
Authority
JP
Japan
Prior art keywords
step size
modulation code
delta modulation
switched capacitor
capacitor filter
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
JP16798079A
Other languages
Japanese (ja)
Other versions
JPS6217900B2 (en
Inventor
Kazunari Irie
Naohisa Oota
Toshinori Tsuboi
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 JP16798079A priority Critical patent/JPS5690623A/en
Publication of JPS5690623A publication Critical patent/JPS5690623A/en
Publication of JPS6217900B2 publication Critical patent/JPS6217900B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M3/00—Conversion of analogue values to or from differential modulation
    • H03M3/02—Delta modulation, i.e. one-bit differential modulation
    • H03M3/022—Delta modulation, i.e. one-bit differential modulation with adaptable step size, e.g. adaptive delta modulation [ADM]

Abstract

PURPOSE:To perform decoding by a simple circuit by D/A-converting step size, corresponding to a delta modulation code, and then by integrating this analog signal by a switched capacitor filter. CONSTITUTION:A delta modulation code obtained from comparator 12 is supplied to logical operating circuit 15, which outputs step size. This step size is converted by D/A converter 17 into an analog signal, which is integrated by switched capacitor filter 22. As a result, only this step size is enough for the dynamic range of D/A converter 17, which can be composed of a small number of bits. The output of switched capacitor filter 22 is used as outputs of a local decoder and decoder, so that the hardware can be reduced.
JP16798079A 1979-12-24 1979-12-24 Delta modulation code decoder Granted JPS5690623A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16798079A JPS5690623A (en) 1979-12-24 1979-12-24 Delta modulation code decoder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16798079A JPS5690623A (en) 1979-12-24 1979-12-24 Delta modulation code decoder

Publications (2)

Publication Number Publication Date
JPS5690623A true JPS5690623A (en) 1981-07-22
JPS6217900B2 JPS6217900B2 (en) 1987-04-20

Family

ID=15859573

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16798079A Granted JPS5690623A (en) 1979-12-24 1979-12-24 Delta modulation code decoder

Country Status (1)

Country Link
JP (1) JPS5690623A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63185227A (en) * 1987-01-28 1988-07-30 Nec Corp Oversamping type analog-to-digital converter

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63111898U (en) * 1987-01-14 1988-07-18
JPH01101877A (en) * 1987-10-13 1989-04-19 Hakuriyuu Syuzo Kk Method for making fin liqueur of swellfish

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4896278A (en) * 1972-03-24 1973-12-08

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4896278A (en) * 1972-03-24 1973-12-08

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63185227A (en) * 1987-01-28 1988-07-30 Nec Corp Oversamping type analog-to-digital converter

Also Published As

Publication number Publication date
JPS6217900B2 (en) 1987-04-20

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