JPS5535509A - Digital-analog logarithmic convertor circuit - Google Patents

Digital-analog logarithmic convertor circuit

Info

Publication number
JPS5535509A
JPS5535509A JP10813978A JP10813978A JPS5535509A JP S5535509 A JPS5535509 A JP S5535509A JP 10813978 A JP10813978 A JP 10813978A JP 10813978 A JP10813978 A JP 10813978A JP S5535509 A JPS5535509 A JP S5535509A
Authority
JP
Japan
Prior art keywords
digital
analog logarithmic
resistors
binary number
input
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
JP10813978A
Other languages
Japanese (ja)
Inventor
Hideo Yamauchi
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.)
AGC Inc
Original Assignee
Asahi Glass 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 Asahi Glass Co Ltd filed Critical Asahi Glass Co Ltd
Priority to JP10813978A priority Critical patent/JPS5535509A/en
Publication of JPS5535509A publication Critical patent/JPS5535509A/en
Pending legal-status Critical Current

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  • Analogue/Digital Conversion (AREA)

Abstract

PURPOSE: To convert approximately a digital signal into an analog logarithmic signal uses only resistor and a switch.
CONSTITUTION: Four resistors 1∼4, auxiliary resistors 6∼9 and switches 10-13 are connected as shown in the figure, and the switches 10∼13 are drived against 1, 2, 4 and 8 of input digital binary number. The resistors 1∼4 and 6∼9 have been selected to be same for each of them. Let 1∼4 be Ra and 6∼9 be Rb, then it is better to select that Rb is 1.0∼2.0 times of Ra. The resistance value Z among input terminals 5, 14 including the contact that operated corresponding to input binary number, becomes what was approximately converted into analog logarithmic value from the input binary number.
COPYRIGHT: (C)1980,JPO&Japio
JP10813978A 1978-09-05 1978-09-05 Digital-analog logarithmic convertor circuit Pending JPS5535509A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10813978A JPS5535509A (en) 1978-09-05 1978-09-05 Digital-analog logarithmic convertor circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10813978A JPS5535509A (en) 1978-09-05 1978-09-05 Digital-analog logarithmic convertor circuit

Publications (1)

Publication Number Publication Date
JPS5535509A true JPS5535509A (en) 1980-03-12

Family

ID=14476917

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10813978A Pending JPS5535509A (en) 1978-09-05 1978-09-05 Digital-analog logarithmic convertor circuit

Country Status (1)

Country Link
JP (1) JPS5535509A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002087089A3 (en) * 2001-04-23 2004-03-11 Hans-Wolfgang Diesing Circuit arrangement for physiologically optimised digital adjustment and detection of electric and electronic analog values and levels

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002087089A3 (en) * 2001-04-23 2004-03-11 Hans-Wolfgang Diesing Circuit arrangement for physiologically optimised digital adjustment and detection of electric and electronic analog values and levels

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