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JPS5545235A - Analogue-digital converter - Google Patents

Analogue-digital converter

Info

Publication number
JPS5545235A
JPS5545235A JP11829678A JP11829678A JPS5545235A JP S5545235 A JPS5545235 A JP S5545235A JP 11829678 A JP11829678 A JP 11829678A JP 11829678 A JP11829678 A JP 11829678A JP S5545235 A JPS5545235 A JP S5545235A
Authority
JP
Japan
Prior art keywords
comparator
microcomputer
terminal
voltage
switch
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
JP11829678A
Other languages
Japanese (ja)
Inventor
Mamoru Shimamoto
Taku Yamada
Shinji Shirasaki
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.)
Denso Corp
Original Assignee
NipponDenso 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 NipponDenso Co Ltd filed Critical NipponDenso Co Ltd
Priority to JP11829678A priority Critical patent/JPS5545235A/en
Publication of JPS5545235A publication Critical patent/JPS5545235A/en
Pending legal-status Critical Current

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  • Analogue/Digital Conversion (AREA)

Abstract

PURPOSE:To reduce considerably constituents and adjustment positions by comparing an input analogue voltage with a voltage, which changes in exponential functions, and inputting pulse signals having a width according to the input voltage to a microcomputer and processing them. CONSTITUTION:First, switch 6 is opened, and capacitor C3 is charged with reference power source voltage 2. A one-bit A/D conversion request signal is outputted from terminal 9a on a basis of the processing program of ROM 93 of microcomputer 9, and switch 6 is closed. C3 is discharged, and the potential of terminal 5b of comparator 5 lowers, and output 5c becomes 1 level. Next, switch 6 is opened by the signal from microcomputer 9, and discharge of C3 is started, and the potential of terminal 5b of comparator 5 rises in exponential functions; and when the potential above becomes higher than that of terminal 5a where an input analogue voltage is led, output 5c of comparator 5 becomes 0 level. A pulse width from 1 to 0 of the output of comparator 5 is measured by microcomputer 9 and is converted to a digital signal.
JP11829678A 1978-09-26 1978-09-26 Analogue-digital converter Pending JPS5545235A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11829678A JPS5545235A (en) 1978-09-26 1978-09-26 Analogue-digital converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11829678A JPS5545235A (en) 1978-09-26 1978-09-26 Analogue-digital converter

Publications (1)

Publication Number Publication Date
JPS5545235A true JPS5545235A (en) 1980-03-29

Family

ID=14733160

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11829678A Pending JPS5545235A (en) 1978-09-26 1978-09-26 Analogue-digital converter

Country Status (1)

Country Link
JP (1) JPS5545235A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60223329A (en) * 1984-04-20 1985-11-07 Tokico Ltd Analog-digital converter
JPS62158929U (en) * 1986-03-31 1987-10-08
US7385495B2 (en) 2004-10-18 2008-06-10 Volkswagen Ag Illumination device for vehicles and method for controlling an illumination device for vehicles

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3886541A (en) * 1973-04-25 1975-05-27 Rockwell International Corp Exponential ramp a/d converter
JPS5332651A (en) * 1976-09-07 1978-03-28 Yokogawa Hokushin Electric Corp Analog operation unit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3886541A (en) * 1973-04-25 1975-05-27 Rockwell International Corp Exponential ramp a/d converter
JPS5332651A (en) * 1976-09-07 1978-03-28 Yokogawa Hokushin Electric Corp Analog operation unit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60223329A (en) * 1984-04-20 1985-11-07 Tokico Ltd Analog-digital converter
JPS62158929U (en) * 1986-03-31 1987-10-08
US7385495B2 (en) 2004-10-18 2008-06-10 Volkswagen Ag Illumination device for vehicles and method for controlling an illumination device for vehicles

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