JPS6416027A - A/d converter - Google Patents

A/d converter

Info

Publication number
JPS6416027A
JPS6416027A JP16984787A JP16984787A JPS6416027A JP S6416027 A JPS6416027 A JP S6416027A JP 16984787 A JP16984787 A JP 16984787A JP 16984787 A JP16984787 A JP 16984787A JP S6416027 A JPS6416027 A JP S6416027A
Authority
JP
Japan
Prior art keywords
bit
weighted
switch
capacitor
offset
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.)
Granted
Application number
JP16984787A
Other languages
Japanese (ja)
Other versions
JP2548207B2 (en
Inventor
Hisao Otake
Seiji Okamoto
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.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry 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 Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP62169847A priority Critical patent/JP2548207B2/en
Publication of JPS6416027A publication Critical patent/JPS6416027A/en
Application granted granted Critical
Publication of JP2548207B2 publication Critical patent/JP2548207B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Analogue/Digital Conversion (AREA)

Abstract

PURPOSE:To obtain an conversion characteristic without any offset by using a comparison capacitor weighted with 2<-1> so as to shift the decision of each bit by 1/2 LSB (least significant bit), and applying the A/D conversion afterward. CONSTITUTION:For example, in a 4-bit A/D converter including a sign bit, a capacitor ladder 1 consists of the additional capacitor 2 weighted with 2<-1>, and comparison capacitors 3-6 weighted respectively with 2<-1>, 2<0>, 2<1>, 2<2>, respectively. Then the capacitors 2-6 are charged by an input voltage Vx and the switch 8 is turned off to connect the sampling switch 10 to the ground side and in connecting the ladder switch 11 to the negative reference voltage source 15, then the input voltage Va of the comparator 7 goes to -1/16/VR-Vx and each bit decision is shifted by 1/2 LBS. Thus, in the conversion characteristic, the center value of the analog input and the digital output are matched, then no offset is provided.
JP62169847A 1987-07-09 1987-07-09 A / D converter Expired - Lifetime JP2548207B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62169847A JP2548207B2 (en) 1987-07-09 1987-07-09 A / D converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62169847A JP2548207B2 (en) 1987-07-09 1987-07-09 A / D converter

Publications (2)

Publication Number Publication Date
JPS6416027A true JPS6416027A (en) 1989-01-19
JP2548207B2 JP2548207B2 (en) 1996-10-30

Family

ID=15894036

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62169847A Expired - Lifetime JP2548207B2 (en) 1987-07-09 1987-07-09 A / D converter

Country Status (1)

Country Link
JP (1) JP2548207B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03214818A (en) * 1990-01-19 1991-09-20 Nec Corp Digital analog conversion circuit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57109424A (en) * 1980-12-26 1982-07-07 Oki Electric Ind Co Ltd Analogue-digital converter

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57109424A (en) * 1980-12-26 1982-07-07 Oki Electric Ind Co Ltd Analogue-digital converter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03214818A (en) * 1990-01-19 1991-09-20 Nec Corp Digital analog conversion circuit

Also Published As

Publication number Publication date
JP2548207B2 (en) 1996-10-30

Similar Documents

Publication Publication Date Title
EP0249986A3 (en) Analog-to-digital converter
GB1518482A (en) Signal conversion circuits
US4542370A (en) Cascade-comparator A/D converter
WO1996025798A3 (en) Analog-to-digital conversion with multiple charge redistribution conversions
DE3275620D1 (en) Analog-to-digital converters
JPS5728429A (en) Signal converter
EP0351788A3 (en) Analog-to-digital converting system
AU563148B2 (en) A/d converter
EP0325378A3 (en) Digital-to-analog converter
DE3681277D1 (en) CONSTRUCTION TAPE DIGITAL-ANALOG CONVERTER WITH HIGH RESOLUTION.
EP0298493A3 (en) Successive approximation type a/d converter
JPS6416027A (en) A/d converter
JPS57124933A (en) Digital-to-analog converter
NO863761L (en) PROCEDURE FOR DIGITAL ANALOGUE TRANSFORMATION OF DIGITAL INFORMATION FOR BIPOLAR ANALOG SIGNALS.
WO1997003499A3 (en) Analog-to-digital converter for generating a digital n-bit gray-code
JPS57178417A (en) Digital to analog converting circuit
JPS57202126A (en) Digital-to-analog converter
EP0373736A3 (en) Analog to digital converter
JPS56104532A (en) Digital-analog converting circuit
AU558047B2 (en) Analog to digital converter
JPS57202124A (en) Digital-to-analog converting circuit
EP1142126A4 (en) Capacitive flash analog to digital converter
JPS5725722A (en) Analog-to-digital converter
EP0225968A3 (en) Quasi-analog reconstruction of an amplitude and frequency varying analog input signal
JPS5620329A (en) Decoding circuit

Legal Events

Date Code Title Description
EXPY Cancellation because of completion of term