JPS54154365A - Power supply voltage detecting circuit - Google Patents

Power supply voltage detecting circuit

Info

Publication number
JPS54154365A
JPS54154365A JP6271378A JP6271378A JPS54154365A JP S54154365 A JPS54154365 A JP S54154365A JP 6271378 A JP6271378 A JP 6271378A JP 6271378 A JP6271378 A JP 6271378A JP S54154365 A JPS54154365 A JP S54154365A
Authority
JP
Japan
Prior art keywords
power supply
supply voltage
voltage detecting
terminal
detecting 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
JP6271378A
Other languages
Japanese (ja)
Inventor
Junichi Tabata
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.)
Seiko Instruments Inc
Original Assignee
Seiko Instruments Inc
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 Seiko Instruments Inc filed Critical Seiko Instruments Inc
Priority to JP6271378A priority Critical patent/JPS54154365A/en
Publication of JPS54154365A publication Critical patent/JPS54154365A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To eliminate unstability owing to variations of parts and make possible perfect circuit integration by comparing and detecting power supply voltages through plural voltage dividing circuits in electronic watches, etc.
CONSTITUTION: Outputs of power supply voltage dividing circuits A, C constituted by MOSFETs and resistances are compared in a voltage comparator B and the specified logic levels are outputted in terminal C according to the results of comparison. Here, if the supply voltage detecting value when the divided voltages Va and Vb inputted to FETs 7 and 9 respectively are equal is let to be Hj, then an H level is obtained in the terminal C when the power supply voltage VDD is larger than Ej and an L level when VDD<Vj. Hence, stable voltage detection may be accomplished.
COPYRIGHT: (C)1979,JPO&Japio
JP6271378A 1978-05-25 1978-05-25 Power supply voltage detecting circuit Pending JPS54154365A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6271378A JPS54154365A (en) 1978-05-25 1978-05-25 Power supply voltage detecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6271378A JPS54154365A (en) 1978-05-25 1978-05-25 Power supply voltage detecting circuit

Publications (1)

Publication Number Publication Date
JPS54154365A true JPS54154365A (en) 1979-12-05

Family

ID=13208237

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6271378A Pending JPS54154365A (en) 1978-05-25 1978-05-25 Power supply voltage detecting circuit

Country Status (1)

Country Link
JP (1) JPS54154365A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6134471A (en) * 1984-07-26 1986-02-18 Matsushita Electric Ind Co Ltd Power source voltage detection circuit
US5008566A (en) * 1988-11-30 1991-04-16 Nec Corporation Power supply voltage drop detection circuit for use in EEPROM memory
US5302861A (en) * 1992-11-25 1994-04-12 National Semiconductor Corporation Power on reset circuit with sharply sloped voltage transfer function
US5319255A (en) * 1991-08-29 1994-06-07 National Semiconductor Corporation Power up detect circuit for configurable logic array
US5378936A (en) * 1991-12-19 1995-01-03 Mitsubishi Denki Kabushiki Kaisha Voltage level detecting circuit
US5396115A (en) * 1993-10-26 1995-03-07 Texas Instruments Incorporated Current-sensing power-on reset circuit for integrated circuits
US5721502A (en) * 1995-06-06 1998-02-24 Analog Devices, Inc. Voltage-controlled reset for logic state initialization
CN100360945C (en) * 2005-04-20 2008-01-09 威盛电子股份有限公司 Electric voltage observation circuit
JP2014225739A (en) * 2013-05-15 2014-12-04 株式会社デンソー Voltage determination device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6134471A (en) * 1984-07-26 1986-02-18 Matsushita Electric Ind Co Ltd Power source voltage detection circuit
US5008566A (en) * 1988-11-30 1991-04-16 Nec Corporation Power supply voltage drop detection circuit for use in EEPROM memory
US5319255A (en) * 1991-08-29 1994-06-07 National Semiconductor Corporation Power up detect circuit for configurable logic array
US5378936A (en) * 1991-12-19 1995-01-03 Mitsubishi Denki Kabushiki Kaisha Voltage level detecting circuit
US5302861A (en) * 1992-11-25 1994-04-12 National Semiconductor Corporation Power on reset circuit with sharply sloped voltage transfer function
US5396115A (en) * 1993-10-26 1995-03-07 Texas Instruments Incorporated Current-sensing power-on reset circuit for integrated circuits
US5721502A (en) * 1995-06-06 1998-02-24 Analog Devices, Inc. Voltage-controlled reset for logic state initialization
CN100360945C (en) * 2005-04-20 2008-01-09 威盛电子股份有限公司 Electric voltage observation circuit
JP2014225739A (en) * 2013-05-15 2014-12-04 株式会社デンソー Voltage determination device

Similar Documents

Publication Publication Date Title
KR830009489A (en) High precision AC electric energy measuring system
JPS5674956A (en) Substrate bias voltage generation circuit
JPS54154365A (en) Power supply voltage detecting circuit
JPS5625290A (en) Semiconductor circuit
JPS52111648A (en) Constant voltage circuit
JPS5762779A (en) Alwave rectifying circuit
JPS56122526A (en) Semiconductor integrated circuit
JPS5326175A (en) Electronic watch
JPS5627952A (en) Circuit for generating substrate bias voltage
JPS5673919A (en) Oscillation circuit
JPS5563118A (en) Aft circuit
JPS57135370A (en) Level detecting circuit
JPS57103521A (en) Power supply circuit
JPS5448470A (en) A/d conversion circuit
JPS5337842A (en) Electronic circuit
JPS5485779A (en) Bipolar voltage detecting circuit
JPS5619209A (en) Wave detecting circuit
JPS5713819A (en) Output interface circuit
JPS5516540A (en) Pulse detection circuit
JPS54144879A (en) Threshold voltage measuring circuit for mos type transistor
JPS54154066A (en) Constant-voltage power supply circuit
JPS558160A (en) Oscillation circuit
JPS5516512A (en) Coding circuit
JPS5535261A (en) Wattmeter
JPS55149854A (en) Current detecting circuit for parallel-operated transistor circuit