JPS5595181A - Logarithmic converter - Google Patents

Logarithmic converter

Info

Publication number
JPS5595181A
JPS5595181A JP368479A JP368479A JPS5595181A JP S5595181 A JPS5595181 A JP S5595181A JP 368479 A JP368479 A JP 368479A JP 368479 A JP368479 A JP 368479A JP S5595181 A JPS5595181 A JP S5595181A
Authority
JP
Japan
Prior art keywords
signal
converter
digital
circuit
precision
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
JP368479A
Other languages
Japanese (ja)
Inventor
Masatoshi Tomioka
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP368479A priority Critical patent/JPS5595181A/en
Publication of JPS5595181A publication Critical patent/JPS5595181A/en
Pending legal-status Critical Current

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  • Analogue/Digital Conversion (AREA)

Abstract

PURPOSE:To improve precision infinitely corresponding to the precision of an A/D converter by converting the output of a detection circuit, detecting an AC signal, into a digital signal by the A/D converter and then by performing logarithmic conversion by using the signal. CONSTITUTION:An AC signal from AC signal source 1 is converted into a DC signal by detection circuit 2. The DC signal from detection circuit 2 is converted into a digital signal by A/D converter 3 and digital log converter circuit 4 stores a numeral, obtained by logarithmically converting an analog signal previously, at an address of a memory circuit corresponding to the digital signal. This stored numeral is outputted to output terminal 5. As a result, high-precision conversion is carried into effect. Further, a logarithmic conversion error due to calculation can infinitely be reduced by increasing the number of output bits of the memory circuit of digital log converter circuit 4.
JP368479A 1979-01-16 1979-01-16 Logarithmic converter Pending JPS5595181A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP368479A JPS5595181A (en) 1979-01-16 1979-01-16 Logarithmic converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP368479A JPS5595181A (en) 1979-01-16 1979-01-16 Logarithmic converter

Publications (1)

Publication Number Publication Date
JPS5595181A true JPS5595181A (en) 1980-07-19

Family

ID=11564220

Family Applications (1)

Application Number Title Priority Date Filing Date
JP368479A Pending JPS5595181A (en) 1979-01-16 1979-01-16 Logarithmic converter

Country Status (1)

Country Link
JP (1) JPS5595181A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61255435A (en) * 1985-05-07 1986-11-13 Shimadzu Corp Logarithmic conversion device
DE102017210108A1 (en) 2016-06-24 2017-12-28 Mitsubishi Electric Corporation Object recognition device, object recognition method and self-drive system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61255435A (en) * 1985-05-07 1986-11-13 Shimadzu Corp Logarithmic conversion device
DE102017210108A1 (en) 2016-06-24 2017-12-28 Mitsubishi Electric Corporation Object recognition device, object recognition method and self-drive system

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