JPS551672A - Initial reset circuit - Google Patents

Initial reset circuit

Info

Publication number
JPS551672A
JPS551672A JP7508578A JP7508578A JPS551672A JP S551672 A JPS551672 A JP S551672A JP 7508578 A JP7508578 A JP 7508578A JP 7508578 A JP7508578 A JP 7508578A JP S551672 A JPS551672 A JP S551672A
Authority
JP
Japan
Prior art keywords
initial reset
reset circuit
transistor
constitution
zener
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
JP7508578A
Other languages
Japanese (ja)
Inventor
Yoshiaki Hirano
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP7508578A priority Critical patent/JPS551672A/en
Publication of JPS551672A publication Critical patent/JPS551672A/en
Pending legal-status Critical Current

Links

Landscapes

  • Techniques For Improving Reliability Of Storages (AREA)
  • Electronic Switches (AREA)

Abstract

PURPOSE: To realize the initial reset circuit causing the reset pulse only when memory is volatile, with a very simple circuit constitution through the use of Zener diodes.
CONSTITUTION: When the power supply voltage V1 is less than the Zener voltage V2 of the Zener diode D1 and less than the memory storage voltage Vm due to momentary power failure, the said diode D1 is conductive, the switching transistor Tr2 turns off, and the charge in the capacitor C1 is discharged. Accordingly, when the power supply voltage V1 is restored, the capacitor C1 is charged up through the base of the transistor Tr2, the transistor Tr2 turns on while this period, and reset pulses are developed at the ouput. Thus, the initial reset circuit with very simple circuit constitution can be realized.
COPYRIGHT: (C)1980,JPO&Japio
JP7508578A 1978-06-20 1978-06-20 Initial reset circuit Pending JPS551672A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7508578A JPS551672A (en) 1978-06-20 1978-06-20 Initial reset circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7508578A JPS551672A (en) 1978-06-20 1978-06-20 Initial reset circuit

Publications (1)

Publication Number Publication Date
JPS551672A true JPS551672A (en) 1980-01-08

Family

ID=13565977

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7508578A Pending JPS551672A (en) 1978-06-20 1978-06-20 Initial reset circuit

Country Status (1)

Country Link
JP (1) JPS551672A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5724636U (en) * 1980-07-14 1982-02-08
JPS5923822U (en) * 1982-07-31 1984-02-14 日本電気ホームエレクトロニクス株式会社 Power outage compensation reset circuit
JPS5940926U (en) * 1982-09-08 1984-03-16 株式会社東芝 Reset circuit with backup power supply
JPS59107180U (en) * 1983-01-05 1984-07-19 沖電気工業株式会社 terminal board
JPS59142828U (en) * 1983-03-10 1984-09-25 株式会社日立ホームテック Microcomputer reset circuit
US7795932B2 (en) 2008-02-15 2010-09-14 Hynix Semiconductor Inc. Reset signal generator and a method for generating reset signal of a semiconductor integrated circuit

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5724636U (en) * 1980-07-14 1982-02-08
JPS5923822U (en) * 1982-07-31 1984-02-14 日本電気ホームエレクトロニクス株式会社 Power outage compensation reset circuit
JPS5940926U (en) * 1982-09-08 1984-03-16 株式会社東芝 Reset circuit with backup power supply
JPH0237061Y2 (en) * 1982-09-08 1990-10-08
JPS59107180U (en) * 1983-01-05 1984-07-19 沖電気工業株式会社 terminal board
JPS59142828U (en) * 1983-03-10 1984-09-25 株式会社日立ホームテック Microcomputer reset circuit
US7795932B2 (en) 2008-02-15 2010-09-14 Hynix Semiconductor Inc. Reset signal generator and a method for generating reset signal of a semiconductor integrated circuit

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