JPS57140027A - Sequential comparison type ad converter in pcm audio processor - Google Patents

Sequential comparison type ad converter in pcm audio processor

Info

Publication number
JPS57140027A
JPS57140027A JP2600981A JP2600981A JPS57140027A JP S57140027 A JPS57140027 A JP S57140027A JP 2600981 A JP2600981 A JP 2600981A JP 2600981 A JP2600981 A JP 2600981A JP S57140027 A JPS57140027 A JP S57140027A
Authority
JP
Japan
Prior art keywords
sar2
bits
order
conversion
sar3
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
JP2600981A
Other languages
Japanese (ja)
Other versions
JPH0576210B2 (en
Inventor
Hitoshi Kajiwara
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.)
ARUPAIN KK
Alpine Electronics Inc
Original Assignee
ARUPAIN KK
Alpine Electronics Inc
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 ARUPAIN KK, Alpine Electronics Inc filed Critical ARUPAIN KK
Priority to JP2600981A priority Critical patent/JPS57140027A/en
Publication of JPS57140027A publication Critical patent/JPS57140027A/en
Publication of JPH0576210B2 publication Critical patent/JPH0576210B2/ja
Granted 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
    • H03M1/12—Analogue/digital converters
    • H03M1/14—Conversion in steps with each step involving the same or a different conversion means and delivering more than one bit
    • H03M1/144—Conversion in steps with each step involving the same or a different conversion means and delivering more than one bit the steps being performed sequentially in a single stage, i.e. recirculation type
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12—Analogue/digital converters
    • H03M1/34—Analogue value compared with reference values
    • H03M1/38—Analogue value compared with reference values sequentially only, e.g. successive approximation type
    • H03M1/46—Analogue value compared with reference values sequentially only, e.g. successive approximation type with digital/analogue converter for supplying reference values to converter

Landscapes

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

Abstract

PURPOSE:To prevent the lowering in converting speed due to increased resolution bit, by detecting and correcting the error in a data after conversion of high- order l bits, and making conversion of low-order n-l bits after lapse of a prescribed time. CONSTITUTION:Start clocks and shift clocks are transmitted from a clock generator CG1 to sequential comparison registers SAR2 and SAR3, an enable signal is transmitted to the SAR3, and l-bit digital signals are transmitted from the SARs 2 and 3 to a DA converter DAC4. The sum of an analog signal converted at the DAC4 and an analog signal applied to a terminal 9 is compared with a zero potential at a comparator CM8, and 0 or 1 signal is transferred from a CM8 to the SAR2 depending on the amplitude. After a prescribed time elapses after the conversion of data in high-order l-bits at the SAR2, an operating signal is outputted from the CG1 to a correction circuit 5, where the error of output of the SAR2 is detected and corrected when the output of the CM8 goes to 1, and the SAR3 makes conversion of low-order l-bits for output.
JP2600981A 1981-02-24 1981-02-24 Sequential comparison type ad converter in pcm audio processor Granted JPS57140027A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2600981A JPS57140027A (en) 1981-02-24 1981-02-24 Sequential comparison type ad converter in pcm audio processor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2600981A JPS57140027A (en) 1981-02-24 1981-02-24 Sequential comparison type ad converter in pcm audio processor

Publications (2)

Publication Number Publication Date
JPS57140027A true JPS57140027A (en) 1982-08-30
JPH0576210B2 JPH0576210B2 (en) 1993-10-22

Family

ID=12181692

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2600981A Granted JPS57140027A (en) 1981-02-24 1981-02-24 Sequential comparison type ad converter in pcm audio processor

Country Status (1)

Country Link
JP (1) JPS57140027A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110111585A (en) * 2018-02-01 2019-08-09 吉旗物联科技（上海）有限公司 Method based on GPS quick obtaining CANbus speed

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53120248A (en) * 1977-03-29 1978-10-20 Mitsubishi Electric Corp Analog-digital conversion circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53120248A (en) * 1977-03-29 1978-10-20 Mitsubishi Electric Corp Analog-digital conversion circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110111585A (en) * 2018-02-01 2019-08-09 吉旗物联科技（上海）有限公司 Method based on GPS quick obtaining CANbus speed

Also Published As

Publication number Publication date
JPH0576210B2 (en) 1993-10-22

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