JPS6444624A - Integral a/d converter - Google Patents

Integral a/d converter

Info

Publication number
JPS6444624A
JPS6444624A JP20204787A JP20204787A JPS6444624A JP S6444624 A JPS6444624 A JP S6444624A JP 20204787 A JP20204787 A JP 20204787A JP 20204787 A JP20204787 A JP 20204787A JP S6444624 A JPS6444624 A JP S6444624A
Authority
JP
Japan
Prior art keywords
voltage
time
measured
time counting
comparison
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
JP20204787A
Other languages
Japanese (ja)
Inventor
Mitsunobu Kuroda
Motoharu Terada
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP20204787A priority Critical patent/JPS6444624A/en
Publication of JPS6444624A publication Critical patent/JPS6444624A/en
Pending legal-status Critical Current

Links

Landscapes

  • Analogue/Digital Conversion (AREA)

Abstract

PURPOSE:To reduce the variance of a measured value due to temperature and that due to the variance of the precision of parts by using a time ratio of the time before crossing between a comparison voltage and a measured voltage to the time before crossing between the comparison voltage and a reference voltage and the reference voltage value to calculate an A/D conversion value of the measured voltage. CONSTITUTION:Charging is started in a constant current charging circuit 2 by the charging start signal from an A/D converting and signal processing part 1, and the comparison voltage of comparators 3 and 4 is linearly raised, and simultaneously, time counting is started in time counting parts 5 and 6. The comparison voltage is compared with a measured voltage V1 and a reference voltage V2 by comparators 3 and 4, and a time t1 when the measured voltage V1 exceeds the comparison voltage is counted by the time counting part 5, and this time counting is stopped when the comparison voltage exceeds the measured voltage V1. Similarly, only a time t2 when the reference voltage V2 is higher than the comparison voltage is counted by the time counting part 4. Counted values of time counting parts 3 and 4 are operated in an A/D conversion value correcting and calculating part 7 after a certain time, and the measured voltage V1 is obtained in accordance with V1=V2Xt1/t2.
JP20204787A 1987-08-13 1987-08-13 Integral a/d converter Pending JPS6444624A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20204787A JPS6444624A (en) 1987-08-13 1987-08-13 Integral a/d converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20204787A JPS6444624A (en) 1987-08-13 1987-08-13 Integral a/d converter

Publications (1)

Publication Number Publication Date
JPS6444624A true JPS6444624A (en) 1989-02-17

Family

ID=16451049

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20204787A Pending JPS6444624A (en) 1987-08-13 1987-08-13 Integral a/d converter

Country Status (1)

Country Link
JP (1) JPS6444624A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0958910A1 (en) * 1998-05-19 1999-11-24 Graf von Montgelas, Max Joseph Method and apparatus for manufacturing a plastic film
CN106840440A (en) * 2017-03-03 2017-06-13 成都信息工程大学 A kind of Temperature sampler and temperature acquisition method based on MCU internal comparators

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0958910A1 (en) * 1998-05-19 1999-11-24 Graf von Montgelas, Max Joseph Method and apparatus for manufacturing a plastic film
US6273699B1 (en) 1998-05-19 2001-08-14 Udo Finke Device for manufacturing plastic film
CN106840440A (en) * 2017-03-03 2017-06-13 成都信息工程大学 A kind of Temperature sampler and temperature acquisition method based on MCU internal comparators
CN106840440B (en) * 2017-03-03 2023-07-28 成都信息工程大学 Temperature collector based on MCU internal comparator and temperature collection method

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