JPS58164317A - Current reduction system of a-d converter - Google Patents

Current reduction system of a-d converter

Info

Publication number
JPS58164317A
JPS58164317A JP4677582A JP4677582A JPS58164317A JP S58164317 A JPS58164317 A JP S58164317A JP 4677582 A JP4677582 A JP 4677582A JP 4677582 A JP4677582 A JP 4677582A JP S58164317 A JPS58164317 A JP S58164317A
Authority
JP
Japan
Prior art keywords
12n
comparators
converter
operation
switching
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
JP4677582A
Inventor
Takahiro Fuse
Osamu Kameda
Original Assignee
Casio Comput Co Ltd
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 Casio Comput Co Ltd filed Critical Casio Comput Co Ltd
Priority to JP4677582A priority Critical patent/JPS58164317A/en
Publication of JPS58164317A publication Critical patent/JPS58164317A/en
Application status is Pending legal-status Critical

Links

Classifications

    • HELECTRICITY
    • H03BASIC ELECTRONIC CIRCUITRY
    • H03MCODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00Analogue/digital conversion; Digital/analogue conversion
    • H03M1/002Provisions or arrangements for saving power, e.g. by allowing a sleep mode, using lower supply voltage for downstream stages, using multiple clock domains or by selectively turning on stages when needed
    • HELECTRICITY
    • H03BASIC ELECTRONIC CIRCUITRY
    • H03MCODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12Analogue/digital converters
    • H03M1/34Analogue value compared with reference values
    • H03M1/36Analogue value compared with reference values simultaneously only, i.e. parallel type
    • H03M1/361Analogue value compared with reference values simultaneously only, i.e. parallel type having a separate comparator and reference value for each quantisation level, i.e. full flash converter type
    • H03M1/362Analogue value compared with reference values simultaneously only, i.e. parallel type having a separate comparator and reference value for each quantisation level, i.e. full flash converter type the reference values being generated by a resistive voltage divider
    • H03M1/365Analogue value compared with reference values simultaneously only, i.e. parallel type having a separate comparator and reference value for each quantisation level, i.e. full flash converter type the reference values being generated by a resistive voltage divider the voltage divider being a single resistor string

Abstract

PURPOSE:To perform high-speed switching and to reduce current consumption by providing a circuit for switching in an A-D converter IC and performing the switching between an operation and a stand-by state. CONSTITUTION:In the A-D converter IC3 which compares a video signal in parallel by comparators 121-12n and outputs digital signals from a decoder 13, the bias circuit 14 which inputs the signal CE' of a chip enable signal from a control circuit to control the comparators 121-12n is provided. While the input signal CE is at a low level, the comparators 121-12n are placed in operation to sample the video signal and while the input signal CE is at a high level, the comparators 121-12n are not in operation. The A-D converter IC3 is switched by the external input signal CE, so the high-speed switching and less current consumption are realized.
JP4677582A 1982-03-24 1982-03-24 Current reduction system of a-d converter Pending JPS58164317A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4677582A JPS58164317A (en) 1982-03-24 1982-03-24 Current reduction system of a-d converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4677582A JPS58164317A (en) 1982-03-24 1982-03-24 Current reduction system of a-d converter

Publications (1)

Publication Number Publication Date
JPS58164317A true JPS58164317A (en) 1983-09-29

Family

ID=12756697

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4677582A Pending JPS58164317A (en) 1982-03-24 1982-03-24 Current reduction system of a-d converter

Country Status (1)

Country Link
JP (1) JPS58164317A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007214959A (en) * 2006-02-10 2007-08-23 Oki Electric Ind Co Ltd Analog/digital conversion circuit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5732126A (en) * 1980-08-04 1982-02-20 Matsushita Electric Ind Co Ltd Comparator circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5732126A (en) * 1980-08-04 1982-02-20 Matsushita Electric Ind Co Ltd Comparator circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007214959A (en) * 2006-02-10 2007-08-23 Oki Electric Ind Co Ltd Analog/digital conversion circuit
JP4705858B2 (en) * 2006-02-10 2011-06-22 Okiセミコンダクタ株式会社 Analog / digital conversion circuit

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