JPS5523660A - A/d converter - Google Patents

A/d converter

Info

Publication number
JPS5523660A
JPS5523660A JP9678778A JP9678778A JPS5523660A JP S5523660 A JPS5523660 A JP S5523660A JP 9678778 A JP9678778 A JP 9678778A JP 9678778 A JP9678778 A JP 9678778A JP S5523660 A JPS5523660 A JP S5523660A
Authority
JP
Japan
Prior art keywords
capacitance
stage
voltage
reference voltage
capacitors
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
JP9678778A
Other languages
Japanese (ja)
Inventor
Masahiko Kawamura
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.)
CHIYOU LSI GIJUTSU KENKYU KUMIAI
Original Assignee
CHIYOU LSI GIJUTSU KENKYU KUMIAI
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 CHIYOU LSI GIJUTSU KENKYU KUMIAI filed Critical CHIYOU LSI GIJUTSU KENKYU KUMIAI
Priority to JP9678778A priority Critical patent/JPS5523660A/en
Publication of JPS5523660A publication Critical patent/JPS5523660A/en
Pending legal-status Critical Current

Links

Landscapes

  • Analogue/Digital Conversion (AREA)

Abstract

PURPOSE: To establish the small sized A/D converter, by connecting the cpacitor of capacitance 2C in series with a plurality of comparing voltage storage capacitors of capacitance C, applying reference voltage to the first stage, and producing the comparison voltage after the first stage.
CONSTITUTION: The capacitors C21 to C23 of capacitance 2C are connected un series with the comparison voltage storage capacitors C11 to C13 of capacitance C. The reference voltage VREF is fed to the first stage circuit of C11 and C21, and the stage after the first stage is connected to the storage capacitor of the prestage via the switches S1 and S2, and the final stage is connected with the capacitor C3 of capacitance C via the switches S3, then at the terminal of C11 to C13, 1/2i of the reference voltage (where: i=1∼3) is obtained. Next, the input voltage VIN is held at the capacitor C0 of the capacitance C and it is inputted to the comparator COM with the combination of the switch group I, G1 to G3, B1 to B3. Thus, the bit coefficient bi of each bit represented in VIN=Σbi/2i×VREF between the input voltage and the reference voltage is sequentially determined. Thus, two types of capacitors can be used and the A/D converter in small size and high speed can be obtained.
COPYRIGHT: (C)1980,JPO&Japio
JP9678778A 1978-08-09 1978-08-09 A/d converter Pending JPS5523660A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9678778A JPS5523660A (en) 1978-08-09 1978-08-09 A/d converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9678778A JPS5523660A (en) 1978-08-09 1978-08-09 A/d converter

Publications (1)

Publication Number Publication Date
JPS5523660A true JPS5523660A (en) 1980-02-20

Family

ID=14174342

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9678778A Pending JPS5523660A (en) 1978-08-09 1978-08-09 A/d converter

Country Status (1)

Country Link
JP (1) JPS5523660A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5724699A (en) * 1980-07-17 1982-02-09 Mitsubishi Heavy Ind Ltd Disposal of highly concentrated waste liquid

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5724699A (en) * 1980-07-17 1982-02-09 Mitsubishi Heavy Ind Ltd Disposal of highly concentrated waste liquid

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