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JPS5769259A - Voltage detecting circuit - Google Patents

Voltage detecting circuit

Info

Publication number
JPS5769259A
JPS5769259A JP14519080A JP14519080A JPS5769259A JP S5769259 A JPS5769259 A JP S5769259A JP 14519080 A JP14519080 A JP 14519080A JP 14519080 A JP14519080 A JP 14519080A JP S5769259 A JPS5769259 A JP S5769259A
Authority
JP
Japan
Prior art keywords
voltage
constitution
power source
threshold voltage
inverter
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
JP14519080A
Other languages
Japanese (ja)
Inventor
Toshiro Ohashi
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP14519080A priority Critical patent/JPS5769259A/en
Publication of JPS5769259A publication Critical patent/JPS5769259A/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
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16504—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the components employed
    • G01R19/16519—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the components employed using FET's

Landscapes

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

Abstract

PURPOSE:To sense the decrease in the voltage of a load accurately, by obtaining a constitution wherein a reference voltage itself is not subjected to the effect of a threshold voltage of a metallic oxide semiconductor, and compensating said threshold voltage of the metallic oxide semiconductor. CONSTITUTION:A series circuit of resistors R1 and R2 generates the reference voltage corresponding to the voltage variation in a power source connected to input terminals 1 and 2. At N channel MOS transistor Tr1 outputs a voltage corresponding to the reference voltage and a threshold voltage of an N channel MOS transistor Tr2. Said voltage is applied to the gate of Tr2, and its ON resistance is varied. When the power source voltage is decreased and the voltage generated at the input terminal of the inverter 5 becomes larger than the threshold voltage of the inverter 5 due to the resistance value of Tr2 and a resistor RL, the output is changed from a high level to a low level. In this constitution, the decrease in the power source voltage such as a battery can be accurately sensed.
JP14519080A 1980-10-17 1980-10-17 Voltage detecting circuit Pending JPS5769259A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14519080A JPS5769259A (en) 1980-10-17 1980-10-17 Voltage detecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14519080A JPS5769259A (en) 1980-10-17 1980-10-17 Voltage detecting circuit

Publications (1)

Publication Number Publication Date
JPS5769259A true JPS5769259A (en) 1982-04-27

Family

ID=15379499

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14519080A Pending JPS5769259A (en) 1980-10-17 1980-10-17 Voltage detecting circuit

Country Status (1)

Country Link
JP (1) JPS5769259A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0634750A2 (en) * 1993-07-12 1995-01-18 Kabushiki Kaisha Toshiba Apparatus and method for reading multi-level data stored in a semiconductor memory

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0634750A2 (en) * 1993-07-12 1995-01-18 Kabushiki Kaisha Toshiba Apparatus and method for reading multi-level data stored in a semiconductor memory
EP0634750A3 (en) * 1993-07-12 1996-01-10 Toshiba Kk Apparatus and method for reading multi-level data stored in a semiconductor memory.
US5852575A (en) * 1993-07-12 1998-12-22 Kabushiki Kaisha Toshiba Apparatus and method for reading multi-level data stored in a semiconductor memory

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