JPS55129763A - Selection circuit of voltage coefficient for resistance - Google Patents

Selection circuit of voltage coefficient for resistance

Info

Publication number
JPS55129763A
JPS55129763A JP3816179A JP3816179A JPS55129763A JP S55129763 A JPS55129763 A JP S55129763A JP 3816179 A JP3816179 A JP 3816179A JP 3816179 A JP3816179 A JP 3816179A JP S55129763 A JPS55129763 A JP S55129763A
Authority
JP
Japan
Prior art keywords
voltage
fed
resistance
resistances
amplifier
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
JP3816179A
Other languages
Japanese (ja)
Inventor
Saburo Kaji
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 JP3816179A priority Critical patent/JPS55129763A/en
Publication of JPS55129763A publication Critical patent/JPS55129763A/en
Pending legal-status Critical Current

Links

Landscapes

  • Testing Relating To Insulation (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

PURPOSE: To enable selection with good accuracy in a short time, by the impedance conversion through the application of low and high voltage to the selected resistance and selecting the value of voltage coefficient through the comparison of output voltage obtained.
CONSTITUTION: The output voltage of the OP amplifier 30 is fed to the variable resistance 21, resistances 22 and 23 and variable resistance 24 for voltage coefficient selection range set, when a high voltage is fed to the selected resistance 12. The charging voltage is fed to the capacitor 40 when a low voltage is fed to the resistancs 12, and the voltage dividing this voltage with the resistances 25 and 26 by means of the OP amplifier 35 for impedance conversion, and the divided voltage of the resistances 21, 22, 23 and 24 are fed to the OP amplifier 36 for comparator, and LED 41 illuminates when the resistance 12 is within the voltage coefficient numeral selection range set value with the AND gate 39.
COPYRIGHT: (C)1980,JPO&Japio
JP3816179A 1979-03-29 1979-03-29 Selection circuit of voltage coefficient for resistance Pending JPS55129763A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3816179A JPS55129763A (en) 1979-03-29 1979-03-29 Selection circuit of voltage coefficient for resistance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3816179A JPS55129763A (en) 1979-03-29 1979-03-29 Selection circuit of voltage coefficient for resistance

Publications (1)

Publication Number Publication Date
JPS55129763A true JPS55129763A (en) 1980-10-07

Family

ID=12517675

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3816179A Pending JPS55129763A (en) 1979-03-29 1979-03-29 Selection circuit of voltage coefficient for resistance

Country Status (1)

Country Link
JP (1) JPS55129763A (en)

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