JPS57179754A - Voltage comparator - Google Patents

Voltage comparator

Info

Publication number
JPS57179754A
JPS57179754A JP6665281A JP6665281A JPS57179754A JP S57179754 A JPS57179754 A JP S57179754A JP 6665281 A JP6665281 A JP 6665281A JP 6665281 A JP6665281 A JP 6665281A JP S57179754 A JPS57179754 A JP S57179754A
Authority
JP
Japan
Prior art keywords
voltage
inverter
input
switch
closed
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.)
Granted
Application number
JP6665281A
Other languages
Japanese (ja)
Other versions
JPH0332752B2 (en
Inventor
Juichi Yoneyama
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.)
JIDO KEISOKU GIJUTSU KENKIYUUKUMIAI
JIDOU KEISOKU GIJUTSU KENKIYUU
JIDOU KEISOKU GIJUTSU KENKIYUUKUMIAI
Original Assignee
JIDO KEISOKU GIJUTSU KENKIYUUKUMIAI
JIDOU KEISOKU GIJUTSU KENKIYUU
JIDOU KEISOKU GIJUTSU KENKIYUUKUMIAI
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 JIDO KEISOKU GIJUTSU KENKIYUUKUMIAI, JIDOU KEISOKU GIJUTSU KENKIYUU, JIDOU KEISOKU GIJUTSU KENKIYUUKUMIAI filed Critical JIDO KEISOKU GIJUTSU KENKIYUUKUMIAI
Priority to JP6665281A priority Critical patent/JPS57179754A/en
Publication of JPS57179754A publication Critical patent/JPS57179754A/en
Publication of JPH0332752B2 publication Critical patent/JPH0332752B2/ja
Granted 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
    • G01R19/0038—Circuits for comparing several input signals and for indicating the result of this comparison, e.g. equal, different, greater, smaller (comparing pulses or pulse trains according to amplitude)

Landscapes

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

Abstract

PURPOSE:To erase offset voltage, by detecting the difference between a reference voltage and an unknown input voltage by an inverter and supplying the difference of potential between the input and output terminals of the inverter to the load element of an F/F. CONSTITUTION:When switches S1, S3 and S4 are closed with switches S2 and S5 opened, respectively, a capacitor C is charged by a reference voltage VR and via the switch S1. Then the switch S2 is closed, and an unknown input voltage VX is applied. Thus the voltage of an input terminal P<1> varies from VR to VX, and the voltage equivalent to the degree of change is sent to an inverter I to be amplified. The voltage of the input/output terminals of the inverter I is applied to the gates of MOSFETs Q1 and Q2 which function as the active load elements of a flip-flop F/F. When the switch S5 is closed with the switch S4 opened, the MOSFETs Q3 and Q4 are made active and broken, respectively in the case of VX>VR. Then the FETQ4 becomes active in the case of VX<VR. Thus no offset voltage is caused since a short circuit is previously given between the input and output terminals of the inverter I.
JP6665281A 1981-04-30 1981-04-30 Voltage comparator Granted JPS57179754A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6665281A JPS57179754A (en) 1981-04-30 1981-04-30 Voltage comparator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6665281A JPS57179754A (en) 1981-04-30 1981-04-30 Voltage comparator

Publications (2)

Publication Number Publication Date
JPS57179754A true JPS57179754A (en) 1982-11-05
JPH0332752B2 JPH0332752B2 (en) 1991-05-14

Family

ID=13322039

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6665281A Granted JPS57179754A (en) 1981-04-30 1981-04-30 Voltage comparator

Country Status (1)

Country Link
JP (1) JPS57179754A (en)

Also Published As

Publication number Publication date
JPH0332752B2 (en) 1991-05-14

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