JPS57199325A - Time limit circuit - Google Patents

Time limit circuit

Info

Publication number
JPS57199325A
JPS57199325A JP8462481A JP8462481A JPS57199325A JP S57199325 A JPS57199325 A JP S57199325A JP 8462481 A JP8462481 A JP 8462481A JP 8462481 A JP8462481 A JP 8462481A JP S57199325 A JPS57199325 A JP S57199325A
Authority
JP
Japan
Prior art keywords
circuit
time limit
time
terminal
output
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
JP8462481A
Other languages
Japanese (ja)
Inventor
Hiromi Matsumura
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP8462481A priority Critical patent/JPS57199325A/en
Publication of JPS57199325A publication Critical patent/JPS57199325A/en
Pending 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
    • H03K17/28—Modifications for introducing a time delay before switching

Landscapes

  • Electronic Switches (AREA)

Abstract

PURPOSE:To increase the reliability of a time limit circuit, by providing a detection circuit detecting the lapse of a prescribed time and a storage circuit storing the result of detection. CONSTITUTION:An output of a transistor TR4 connected to a time limit element 3 is applied to a terminal T of a DFF11 being a storage circuit. A power supply 1 is applied to this FF11 at all times and a reset circuit consisting of a capacitor 12 and a resistor 13 is provided. When a switch 2 is closed, and the time exceeds the set time and the TR4 turns on, then the terminal T of the FF11 goes to high level. Thus, the output Q goes to high and keeps this high level independently of the level of the terminal T. Then, the state of the output Q after the set time is not subject to the effect of the time limit element 3. Thus, the reliability of the time limit circuit can be increased with a simple circuit.
JP8462481A 1981-06-02 1981-06-02 Time limit circuit Pending JPS57199325A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8462481A JPS57199325A (en) 1981-06-02 1981-06-02 Time limit circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8462481A JPS57199325A (en) 1981-06-02 1981-06-02 Time limit circuit

Publications (1)

Publication Number Publication Date
JPS57199325A true JPS57199325A (en) 1982-12-07

Family

ID=13835824

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8462481A Pending JPS57199325A (en) 1981-06-02 1981-06-02 Time limit circuit

Country Status (1)

Country Link
JP (1) JPS57199325A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59211323A (en) * 1983-05-16 1984-11-30 Yukio Fujita Long time timer utilizing discharge time of battery
WO2002097988A1 (en) * 2001-06-01 2002-12-05 Koninklijke Philips Electronics N.V. Optimized on/off control circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59211323A (en) * 1983-05-16 1984-11-30 Yukio Fujita Long time timer utilizing discharge time of battery
WO2002097988A1 (en) * 2001-06-01 2002-12-05 Koninklijke Philips Electronics N.V. Optimized on/off control circuit

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