JPS56142464A - Percentage measurement and indication circuit - Google Patents

Percentage measurement and indication circuit

Info

Publication number
JPS56142464A
JPS56142464A JP4668080A JP4668080A JPS56142464A JP S56142464 A JPS56142464 A JP S56142464A JP 4668080 A JP4668080 A JP 4668080A JP 4668080 A JP4668080 A JP 4668080A JP S56142464 A JPS56142464 A JP S56142464A
Authority
JP
Japan
Prior art keywords
voltage
counter
comparative
unit
percentage
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
JP4668080A
Other languages
Japanese (ja)
Inventor
Miki Yamamoto
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP4668080A priority Critical patent/JPS56142464A/en
Publication of JPS56142464A publication Critical patent/JPS56142464A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/10—Measuring sum, difference or ratio

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

PURPOSE:To make it possible to measure and indicate a ratio between two voltages by a simple circuit, by comparing a comparative voltage with an output of a reference-voltage-adding unit having an analog switch capable of being switched in turn by an output of a counter. CONSTITUTION:A decimal counter 5 is cleared by a signal emitted from a smaple- holding-signal-emitting unit 3, and at the same time, a reference voltage 101 and a comparative voltage 102 are held by a reference-voltage-sample-hodling unit 1 and a comparative-voltage-smaple-holding unit 2, respectively. When the decimal counter 5 starts counting, an analog switches 6 are switched in turn, and an adding circuit consisting of an operating amplifier 7 and resistances 41-50 keep adding voltage by 1/100 of a number of a terminal 103 at a time. When a value of an input terminal 123 of a comparator 8 exceeds a value of a terminal 122, a gate 9 is closed and the decimal counter 5 stops counting. An indicating circuit 10 indicates a number of the counter 5 at that time, and percentage of the comparative voltage over the reference voltage is indicated. it is possible, by doing so, to easily seek the percentage without using a calculator.
JP4668080A 1980-04-09 1980-04-09 Percentage measurement and indication circuit Pending JPS56142464A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4668080A JPS56142464A (en) 1980-04-09 1980-04-09 Percentage measurement and indication circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4668080A JPS56142464A (en) 1980-04-09 1980-04-09 Percentage measurement and indication circuit

Publications (1)

Publication Number Publication Date
JPS56142464A true JPS56142464A (en) 1981-11-06

Family

ID=12754084

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4668080A Pending JPS56142464A (en) 1980-04-09 1980-04-09 Percentage measurement and indication circuit

Country Status (1)

Country Link
JP (1) JPS56142464A (en)

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