JPS56128462A - Impedance comparator - Google Patents

Impedance comparator

Info

Publication number
JPS56128462A
JPS56128462A JP3135580A JP3135580A JPS56128462A JP S56128462 A JPS56128462 A JP S56128462A JP 3135580 A JP3135580 A JP 3135580A JP 3135580 A JP3135580 A JP 3135580A JP S56128462 A JPS56128462 A JP S56128462A
Authority
JP
Japan
Prior art keywords
capacitor
level
voltage
impedance
circuit
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
JP3135580A
Other languages
Japanese (ja)
Inventor
Makoto Sugano
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.)
Tamagawa Gakuen
Original Assignee
Tamagawa Gakuen
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 Tamagawa Gakuen filed Critical Tamagawa Gakuen
Priority to JP3135580A priority Critical patent/JPS56128462A/en
Publication of JPS56128462A publication Critical patent/JPS56128462A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

PURPOSE:To compare the level between two impedances, by charging a capacitor through each impedance and examines the polarity of the charged electric charge during the AC positive and negative polarity voltage. CONSTITUTION:The circuit 13a to which the diode 11a and impedance element 12a are connected is connected in parallel to the circuit 12b having the same structure as the circuit 13a. In this case, however, the diodes 11a and 11b have the opposite polarity to each other. An AC power source 15 is connected to the circuit via a capacitor 14. Then a voltmeter 17 is connected via a low pass filter 16 to detect the DC voltage of the capacitor 14. The filter 16 prevents a supply of the current of the source 15 to the voltmeter, and the impedance of the capacitor 19 is selected at a level small enough in terms of the frequency of the source 15. In such constitution, the voltage proportional to the level of the impedances of the impedance elements 12a and 12b is charged for the mean voltage across the capacitor 14. Thus the level of impedances is compared by the level of the voltage.
JP3135580A 1980-03-12 1980-03-12 Impedance comparator Pending JPS56128462A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3135580A JPS56128462A (en) 1980-03-12 1980-03-12 Impedance comparator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3135580A JPS56128462A (en) 1980-03-12 1980-03-12 Impedance comparator

Publications (1)

Publication Number Publication Date
JPS56128462A true JPS56128462A (en) 1981-10-07

Family

ID=12328916

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3135580A Pending JPS56128462A (en) 1980-03-12 1980-03-12 Impedance comparator

Country Status (1)

Country Link
JP (1) JPS56128462A (en)

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