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JPS54130868A - Logarithmic characteristic ad converter - Google Patents

Logarithmic characteristic ad converter

Info

Publication number
JPS54130868A
JPS54130868A JP4046978A JP4046978A JPS54130868A JP S54130868 A JPS54130868 A JP S54130868A JP 4046978 A JP4046978 A JP 4046978A JP 4046978 A JP4046978 A JP 4046978A JP S54130868 A JPS54130868 A JP S54130868A
Authority
JP
Japan
Prior art keywords
voltage
integrator
constitution
value
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.)
Granted
Application number
JP4046978A
Other languages
Japanese (ja)
Other versions
JPS5951780B2 (en
Inventor
Shiro Oikawa
Hiroshi Ishihara
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.)
Shimadzu Corp
Original Assignee
Shimadzu 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 Shimadzu Corp filed Critical Shimadzu Corp
Priority to JP4046978A priority Critical patent/JPS5951780B2/en
Publication of JPS54130868A publication Critical patent/JPS54130868A/en
Publication of JPS5951780B2 publication Critical patent/JPS5951780B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Analogue/Digital Conversion (AREA)

Abstract

PURPOSE: To obtain a high-reliability logarithmic characteristic A/D converter in a simple constitution by using an integrator for integration as well as logarithm conversion.
CONSTITUTION: Initially, switch element 7 is turned off to give a normal integrator constitution to integrator 1, and input voltage Vi given to input terminal 5 is integrated throughout fixed section T. Here, when switch element 5 is turned on, output voltage V1 is attenuated through capacitor 4 and resistance 6 according as the time elapses, and this voltage is detected by detector 9 when this voltage has reached reference voltage V0 after time T1. Then, gate circuit 10 is opened for time T1, and clock pulses CP during this opening timer are counted by counter 11, and this counted value becomes a value obtained by converting the logarithm value of the input voltage Vi integrated value to a digital quantity.
COPYRIGHT: (C)1979,JPO&Japio
JP4046978A 1978-03-31 1978-03-31 Logarithmic AD converter Expired JPS5951780B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4046978A JPS5951780B2 (en) 1978-03-31 1978-03-31 Logarithmic AD converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4046978A JPS5951780B2 (en) 1978-03-31 1978-03-31 Logarithmic AD converter

Publications (2)

Publication Number Publication Date
JPS54130868A true JPS54130868A (en) 1979-10-11
JPS5951780B2 JPS5951780B2 (en) 1984-12-15

Family

ID=12581486

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4046978A Expired JPS5951780B2 (en) 1978-03-31 1978-03-31 Logarithmic AD converter

Country Status (1)

Country Link
JP (1) JPS5951780B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60157337A (en) * 1984-01-26 1985-08-17 Sony Corp Analog-to-digital converter

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA842593B (en) * 1983-04-21 1984-11-28 Goodyear Tire & Rubber Tire packaging

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60157337A (en) * 1984-01-26 1985-08-17 Sony Corp Analog-to-digital converter

Also Published As

Publication number Publication date
JPS5951780B2 (en) 1984-12-15

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