JPS5595181A - Logarithmic converter - Google Patents
Logarithmic converterInfo
- 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
Links
Landscapes
- 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.
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61255435A (en) * | 1985-05-07 | 1986-11-13 | Shimadzu Corp | Logarithm converter |
DE102017210108A1 (en) | 2016-06-24 | 2017-12-28 | Mitsubishi Electric Corporation | Object recognition device, object recognition method and self-drive system |
-
1979
- 1979-01-16 JP JP368479A patent/JPS5595181A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61255435A (en) * | 1985-05-07 | 1986-11-13 | Shimadzu Corp | Logarithm converter |
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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