JPS5669926A - A/d converter - Google Patents

A/d converter

Info

Publication number
JPS5669926A
JPS5669926A JP14827379A JP14827379A JPS5669926A JP S5669926 A JPS5669926 A JP S5669926A JP 14827379 A JP14827379 A JP 14827379A JP 14827379 A JP14827379 A JP 14827379A JP S5669926 A JPS5669926 A JP S5669926A
Authority
JP
Japan
Prior art keywords
anlo
limit value
lower limit
registers
converted
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
JP14827379A
Other languages
Japanese (ja)
Inventor
Masayoshi Kanehara
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP14827379A priority Critical patent/JPS5669926A/en
Publication of JPS5669926A publication Critical patent/JPS5669926A/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
    • H03M1/12—Analogue/digital converters
    • H03M1/18—Automatic control for modifying the range of signals the converter can handle, e.g. gain ranging

Abstract

PURPOSE:To lighten a load on a data processing program by obtaining a comparison voltage by equally dividing given data by 2 between its upper limit value and lower limit value. CONSTITUTION:When ANLO is A/D-converted, multiplexer 4 selects ANLO and the upper limit value and lower limit value of ANLO are set in registers 1a and 1b respectively. The contents of registers 1a and 1b are converted by D/A converters 6a and 6b into analog values, which are applied to D/A converter 2 via buffers 7a and 7b. Consequently, the potential difference between the upper and lower limit values is equally divided by 2 and voltage comparator 3 obtains the l-bit digital value closest to ANLO.
JP14827379A 1979-11-12 1979-11-12 A/d converter Pending JPS5669926A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14827379A JPS5669926A (en) 1979-11-12 1979-11-12 A/d converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14827379A JPS5669926A (en) 1979-11-12 1979-11-12 A/d converter

Publications (1)

Publication Number Publication Date
JPS5669926A true JPS5669926A (en) 1981-06-11

Family

ID=15449072

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14827379A Pending JPS5669926A (en) 1979-11-12 1979-11-12 A/d converter

Country Status (1)

Country Link
JP (1) JPS5669926A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6064524A (en) * 1983-08-02 1985-04-13 シ−メンス、アクチエンゲゼルシヤフト Integrated semiconductor circuit
JPS623529A (en) * 1985-06-29 1987-01-09 Nec Corp Automatic gain control circuit
JPH02268522A (en) * 1989-04-10 1990-11-02 Nec Corp A/d converter
JP2006140819A (en) * 2004-11-12 2006-06-01 Denso Corp Successive approximation ad converter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6064524A (en) * 1983-08-02 1985-04-13 シ−メンス、アクチエンゲゼルシヤフト Integrated semiconductor circuit
JPS623529A (en) * 1985-06-29 1987-01-09 Nec Corp Automatic gain control circuit
JPH02268522A (en) * 1989-04-10 1990-11-02 Nec Corp A/d converter
JP2006140819A (en) * 2004-11-12 2006-06-01 Denso Corp Successive approximation ad converter

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