JPH02177612A - Power source reset circuit for direct current two-wire type sensor - Google Patents

Power source reset circuit for direct current two-wire type sensor

Info

Publication number
JPH02177612A
JPH02177612A JP32914788A JP32914788A JPH02177612A JP H02177612 A JPH02177612 A JP H02177612A JP 32914788 A JP32914788 A JP 32914788A JP 32914788 A JP32914788 A JP 32914788A JP H02177612 A JPH02177612 A JP H02177612A
Authority
JP
Japan
Prior art keywords
transistor
power source
voltage
reset circuit
direct current
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
JP32914788A
Other languages
Japanese (ja)
Other versions
JP2730112B2 (en
Inventor
Tomoshi Motouji
Akio Matsumoto
Yasushi Matsuoka
Yoshimi Kanda
Tsutomu Ajioka
Hirobumi Endo
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.)
Omron Corp
Original Assignee
Omron Tateisi Electronics Co
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 Omron Tateisi Electronics Co filed Critical Omron Tateisi Electronics Co
Priority to JP63329147A priority Critical patent/JP2730112B2/en
Publication of JPH02177612A publication Critical patent/JPH02177612A/en
Application granted granted Critical
Publication of JP2730112B2 publication Critical patent/JP2730112B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE: To execute a stable operation without being affected by the fluctuation of a voltage when an output is turned on by providing hysteresis for the reset operation starting voltage of a power source reset circuit.
CONSTITUTION: When a voltage VS is ≥3VBE, a transistor Tr1 is conducted and a current does not flow to a transistor Tr5. Then, a transistor Tr13 is also turned off. Accordingly, since the collector current of a transistor Tr6 flows into the base of a transistor Tr4, the transistor Tr4 is turned on. Since a result, since one diode D2 is short-circuited by the transistor Tr4, and hereafter, the transistor Tr1 is operated when the voltage V4 is ≥2VBE. Thus, the reset starting voltage of such a power source reset voltage falls down from the 3VBE to 2VBE and the stable operation can be executed.
COPYRIGHT: (C)1990,JPO&Japio
JP63329147A 1988-12-28 1988-12-28 Power reset circuit in DC two-wire sensor Expired - Lifetime JP2730112B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63329147A JP2730112B2 (en) 1988-12-28 1988-12-28 Power reset circuit in DC two-wire sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63329147A JP2730112B2 (en) 1988-12-28 1988-12-28 Power reset circuit in DC two-wire sensor

Publications (2)

Publication Number Publication Date
JPH02177612A true JPH02177612A (en) 1990-07-10
JP2730112B2 JP2730112B2 (en) 1998-03-25

Family

ID=18218166

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63329147A Expired - Lifetime JP2730112B2 (en) 1988-12-28 1988-12-28 Power reset circuit in DC two-wire sensor

Country Status (1)

Country Link
JP (1) JP2730112B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2779454A1 (en) 2013-03-15 2014-09-17 OMRON Corporation Sensor having a power reset and a load drive circuit

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5717043A (en) * 1980-07-04 1982-01-28 Hitachi Ltd Power-on resetting circuit
JPS60107912A (en) * 1983-11-15 1985-06-13 Mitsubishi Electric Corp Reset signal generator

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5717043A (en) * 1980-07-04 1982-01-28 Hitachi Ltd Power-on resetting circuit
JPS60107912A (en) * 1983-11-15 1985-06-13 Mitsubishi Electric Corp Reset signal generator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2779454A1 (en) 2013-03-15 2014-09-17 OMRON Corporation Sensor having a power reset and a load drive circuit

Also Published As

Publication number Publication date
JP2730112B2 (en) 1998-03-25

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