JPS6419829A - Sequential comparing type a/d converting circuit - Google Patents

Sequential comparing type a/d converting circuit

Info

Publication number
JPS6419829A
JPS6419829A JP17470787A JP17470787A JPS6419829A JP S6419829 A JPS6419829 A JP S6419829A JP 17470787 A JP17470787 A JP 17470787A JP 17470787 A JP17470787 A JP 17470787A JP S6419829 A JPS6419829 A JP S6419829A
Authority
JP
Japan
Prior art keywords
comparing
sampling
input voltage
analog input
significant bit
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
JP17470787A
Other languages
Japanese (ja)
Inventor
Tatsuro Totani
Nobutaka Nagasaki
Hiroyuki Matsuura
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.)
Hitachi Microcomputer System Ltd
Hitachi Ltd
Original Assignee
Hitachi Ltd
Hitachi Microcomputer Engineering 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 Hitachi Ltd, Hitachi Microcomputer Engineering Ltd filed Critical Hitachi Ltd
Priority to JP17470787A priority Critical patent/JPS6419829A/en
Publication of JPS6419829A publication Critical patent/JPS6419829A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To improve the charging rate of an analog input voltage to the capacity of a sampling without deteriorating converting accuracy by respectively individually providing chopper type comparators for comparing the most significant bit and for comparing a second and subsequent bits and executing the comparing operation of a former and the sampling operation of a latter in parallel. CONSTITUTION:During the comparison and the operation of the most significant bit, an analog input voltage Vin for comparing the second and subsequent bits is previously sampled and started in a sampling capacity 8 holed with a second chopper type comparator 2. At the time t3 in the vicinity of completing the comparing operation of the most significant bit, when a sampling period for comparing the second and subsequent bits is completed, the comparison operation of the second bit at a comparatively early time t4 succeeding thereto can be started. Thereby, the charging rate of the analog input voltage Vin to the sampling capacity 8 can be improved without lowering the converting accuracy or the converting speed.
JP17470787A 1987-07-15 1987-07-15 Sequential comparing type a/d converting circuit Pending JPS6419829A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17470787A JPS6419829A (en) 1987-07-15 1987-07-15 Sequential comparing type a/d converting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17470787A JPS6419829A (en) 1987-07-15 1987-07-15 Sequential comparing type a/d converting circuit

Publications (1)

Publication Number Publication Date
JPS6419829A true JPS6419829A (en) 1989-01-23

Family

ID=15983249

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17470787A Pending JPS6419829A (en) 1987-07-15 1987-07-15 Sequential comparing type a/d converting circuit

Country Status (1)

Country Link
JP (1) JPS6419829A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0334725A (en) * 1989-06-30 1991-02-14 Nec Corp Analog/digital converter
JP2012068074A (en) * 2010-09-22 2012-04-05 New Japan Radio Co Ltd Voltage range detecting device
JP2015041896A (en) * 2013-08-22 2015-03-02 株式会社東芝 A/d converter

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0334725A (en) * 1989-06-30 1991-02-14 Nec Corp Analog/digital converter
JP2012068074A (en) * 2010-09-22 2012-04-05 New Japan Radio Co Ltd Voltage range detecting device
JP2015041896A (en) * 2013-08-22 2015-03-02 株式会社東芝 A/d converter

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