JPS57168525A - Detecting circuit of power supply voltage - Google Patents

Detecting circuit of power supply voltage

Info

Publication number
JPS57168525A
JPS57168525A JP56054138A JP5413881A JPS57168525A JP S57168525 A JPS57168525 A JP S57168525A JP 56054138 A JP56054138 A JP 56054138A JP 5413881 A JP5413881 A JP 5413881A JP S57168525 A JPS57168525 A JP S57168525A
Authority
JP
Japan
Prior art keywords
level
output
power supply
supply voltage
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.)
Granted
Application number
JP56054138A
Other languages
Japanese (ja)
Other versions
JPH0371816B2 (en
Inventor
Kiyoto Ota
Tsunezo Adachi
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 JP56054138A priority Critical patent/JPS57168525A/en
Publication of JPS57168525A publication Critical patent/JPS57168525A/en
Publication of JPH0371816B2 publication Critical patent/JPH0371816B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/22—Modifications for ensuring a predetermined initial state when the supply voltage has been applied

Landscapes

  • Electronic Switches (AREA)

Abstract

PURPOSE:To ensure an assured and stable resetting action for an electronic circuit device, by providing two voltage detecting parts that detect difference voltage values, a gate part to which the outputs of the voltage detecting parts plus a bistable circuit part. CONSTITUTION:The output levels of power supply voltage detecting parts 8 and 9 are set at L at a moment immediately before the rise of the power supply voltage. As a result, only an RS-FF11 is set and the output Q of the RS-FF11 is set at H level. Thus an NOR circuit 15 is set at L level, and the FF11 is never reset. When the power supply voltage rises up to the detecting level of the part 8, the output level of the part 8 is set at H level. As a result, the output of an inverter 12 is set at L level with no change caused to the output level of the circuit 15. When the power supply voltage rises more up to the detecting level of the part 9, the output levels of both parts 8 and 9 are set at H level. Thus the output levels of inverters 12 and 13 are set at L level. As a result, the output level of the circuit 15 is set at H level to reset the FF11. Then the output Q of the FF11 is switched to L level.
JP56054138A 1981-04-09 1981-04-09 Detecting circuit of power supply voltage Granted JPS57168525A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56054138A JPS57168525A (en) 1981-04-09 1981-04-09 Detecting circuit of power supply voltage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56054138A JPS57168525A (en) 1981-04-09 1981-04-09 Detecting circuit of power supply voltage

Publications (2)

Publication Number Publication Date
JPS57168525A true JPS57168525A (en) 1982-10-16
JPH0371816B2 JPH0371816B2 (en) 1991-11-14

Family

ID=12962207

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56054138A Granted JPS57168525A (en) 1981-04-09 1981-04-09 Detecting circuit of power supply voltage

Country Status (1)

Country Link
JP (1) JPS57168525A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4682051A (en) * 1984-02-28 1987-07-21 Fujitsu Limited Voltage level detection circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4682051A (en) * 1984-02-28 1987-07-21 Fujitsu Limited Voltage level detection circuit

Also Published As

Publication number Publication date
JPH0371816B2 (en) 1991-11-14

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