JPS5650468A - Absolute value circuit - Google Patents

Absolute value circuit

Info

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
Application number
JP12597879A
Other languages
Japanese (ja)
Inventor
Mikio Narita
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.)
Yokogawa Electric Corp
Original Assignee
Hokushin Electric Works Ltd
Yokogawa Hokushin Electric 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 Hokushin Electric Works Ltd, Yokogawa Hokushin Electric Corp filed Critical Hokushin Electric Works Ltd
Priority to JP12597879A priority Critical patent/JPS5650468A/en
Publication of JPS5650468A publication Critical patent/JPS5650468A/en
Pending legal-status Critical Current

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.
JP12597879A 1979-09-28 1979-09-28 Absolute value circuit Pending JPS5650468A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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