JPS6411413A - Clearing method for electronic circuit - Google Patents

Clearing method for electronic circuit

Info

Publication number
JPS6411413A
JPS6411413A JP16537387A JP16537387A JPS6411413A JP S6411413 A JPS6411413 A JP S6411413A JP 16537387 A JP16537387 A JP 16537387A JP 16537387 A JP16537387 A JP 16537387A JP S6411413 A JPS6411413 A JP S6411413A
Authority
JP
Japan
Prior art keywords
power source
comparator
source vcc
output
voltage
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
JP16537387A
Other languages
Japanese (ja)
Inventor
Masaki Sato
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.)
Hitachi Engineering Co Ltd
Hitachi Ltd
Original Assignee
Hitachi Engineering Co Ltd
Hitachi 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 Hitachi Engineering Co Ltd, Hitachi Ltd filed Critical Hitachi Engineering Co Ltd
Priority to JP16537387A priority Critical patent/JPS6411413A/en
Publication of JPS6411413A publication Critical patent/JPS6411413A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To minimize system malfunction without reference to the performance of a power source by using a voltage comparator for a power source level detection part, providing a delay element on its one side, and resetting a clear mode after a constant level is reached after the power source is turned on. CONSTITUTION:The + input of the voltage comparator 6 rises simultaneously with the power-on operation of the power source Vcc and the output of the comparator 6 turns on when the power source Vcc reaches the operating voltage of the comparator 6. A TR 11 connected to the output of the comparator 6, on the other hand, is cleared before turning on when the power source Vcc exceeds the base-emitter saturation voltage of the TR 11. Further, the - input of the comparator 6 is delayed by a capacitor 2 and after the power source Vcc is set up above the constant level, the output of the comparator 6 is inverted to reset the clear mode. Further, when the power source is turned off, a clear circuit operates having a detection point where a connected load (smoothing capacitor, IC circuit, etc.) does not exert any influence, and clearing operation is performed before a negative-side power source Vcc is ceased.
JP16537387A 1987-07-03 1987-07-03 Clearing method for electronic circuit Pending JPS6411413A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16537387A JPS6411413A (en) 1987-07-03 1987-07-03 Clearing method for electronic circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16537387A JPS6411413A (en) 1987-07-03 1987-07-03 Clearing method for electronic circuit

Publications (1)

Publication Number Publication Date
JPS6411413A true JPS6411413A (en) 1989-01-17

Family

ID=15811142

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16537387A Pending JPS6411413A (en) 1987-07-03 1987-07-03 Clearing method for electronic circuit

Country Status (1)

Country Link
JP (1) JPS6411413A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7034581B2 (en) * 2002-11-14 2006-04-25 Seiko Instruments Inc. Voltage detecting circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7034581B2 (en) * 2002-11-14 2006-04-25 Seiko Instruments Inc. Voltage detecting circuit

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