JPS6422114A - Ad converter circuit - Google Patents

Ad converter circuit

Info

Publication number
JPS6422114A
JPS6422114A JP17825687A JP17825687A JPS6422114A JP S6422114 A JPS6422114 A JP S6422114A JP 17825687 A JP17825687 A JP 17825687A JP 17825687 A JP17825687 A JP 17825687A JP S6422114 A JPS6422114 A JP S6422114A
Authority
JP
Japan
Prior art keywords
conversion
rsff
resolution
reference voltage
sampling time
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
JP17825687A
Other languages
Japanese (ja)
Inventor
Takao Fujimoto
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Priority to JP17825687A priority Critical patent/JPS6422114A/en
Publication of JPS6422114A publication Critical patent/JPS6422114A/en
Pending legal-status Critical Current

Links

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  • Analogue/Digital Conversion (AREA)

Abstract

PURPOSE:To cause a resolution and an accuracy to be variable by using a reference voltage circuit to change hourly for the reference voltage generating circuit of an AD converter and changing a sampling time. CONSTITUTION:A programmable clock generator 15 is used as a sampling time base, an RSFF 13 is reset after an (n) pulse as a shift clock 16, an FET 10 is turned off and an AD conversion is completed. A CPU, when an AD converting completing signal comes from an (n) counter 14, fetches data into a data bus line. An AD converting start sets the RSFF 13 and starts. By using the I/O of a single chip microcomputer, a constant current value is made variable, a non-linear conversion can be executed by the occasional full scale conversion, and the resolution can be also determined by the number of the bits of a register placed in a RAM.
JP17825687A 1987-07-16 1987-07-16 Ad converter circuit Pending JPS6422114A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17825687A JPS6422114A (en) 1987-07-16 1987-07-16 Ad converter circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17825687A JPS6422114A (en) 1987-07-16 1987-07-16 Ad converter circuit

Publications (1)

Publication Number Publication Date
JPS6422114A true JPS6422114A (en) 1989-01-25

Family

ID=16045312

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17825687A Pending JPS6422114A (en) 1987-07-16 1987-07-16 Ad converter circuit

Country Status (1)

Country Link
JP (1) JPS6422114A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102347770A (en) * 2011-08-26 2012-02-08 中国北车集团大连机车研究所有限公司 Locomotive auxiliary control unit sampling and processing circuit
JP2015133631A (en) * 2014-01-14 2015-07-23 三菱電機株式会社 Analog-digital converter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102347770A (en) * 2011-08-26 2012-02-08 中国北车集团大连机车研究所有限公司 Locomotive auxiliary control unit sampling and processing circuit
JP2015133631A (en) * 2014-01-14 2015-07-23 三菱電機株式会社 Analog-digital converter

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