JPS5650468A - Absolute value circuit - Google Patents
Absolute value circuitInfo
- Publication number
- JPS5650468A JPS5650468A JP12597879A JP12597879A JPS5650468A JP S5650468 A JPS5650468 A JP S5650468A JP 12597879 A JP12597879 A JP 12597879A JP 12597879 A JP12597879 A JP 12597879A JP S5650468 A JPS5650468 A JP S5650468A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- conversion
- precision
- absolute value
- 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
Links
Abstract
PURPOSE:To make high-precision conversion possible with a simple constitution, by reducing the number of resistors concerning directly the conversion precision of input/output when the circuit is constituted with differential operational amplifiers, switching elements, and resistors. CONSTITUTION:In case that input voltage Ei is applied to input terminal 1, diode 9 is turned on if Ei is positive, and voltage Ei is subjected to impedance conversion by operational amplifier 11 as it is and appears at output terminal 12. That is, Ei= Eo, (Ei>0) is true. Next, if voltage Ei is negative, diode 9 is turned on, and voltage EN generated at output terminal 10 becomes -(R7/R6)Ei, (Ei<0), and this voltage EN is subjected to impedance conversion as it is and becomes output voltage Eo. If resistances R6 and R7 are equal, Eo=-Ei, (Ei<0) is true, and voltage Eo is obtained as the absolute value of voltage Ei. In this case, the conversion precision is dependent upon resistance values of R6 and R7 and is not dependent upon the precision of many resistances, so that high-precision conversion can be secured with a simple constitution.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12597879A JPS5650468A (en) | 1979-09-28 | 1979-09-28 | Absolute value circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12597879A JPS5650468A (en) | 1979-09-28 | 1979-09-28 | Absolute value circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5650468A true JPS5650468A (en) | 1981-05-07 |
Family
ID=14923691
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12597879A Pending JPS5650468A (en) | 1979-09-28 | 1979-09-28 | Absolute value circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5650468A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0520432A2 (en) * | 1991-06-27 | 1992-12-30 | Canon Kabushiki Kaisha | Signal processing circuit and system for detection of absolute value |
-
1979
- 1979-09-28 JP JP12597879A patent/JPS5650468A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0520432A2 (en) * | 1991-06-27 | 1992-12-30 | Canon Kabushiki Kaisha | Signal processing circuit and system for detection of absolute value |
US5642070A (en) * | 1991-06-27 | 1997-06-24 | Canon Kabushiki Kaisha | Signal processing circuit and system for detection of absolute value |
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