JPS5715530A - Power supply timer circuit - Google Patents

Power supply timer circuit

Info

Publication number
JPS5715530A
JPS5715530A JP8932180A JP8932180A JPS5715530A JP S5715530 A JPS5715530 A JP S5715530A JP 8932180 A JP8932180 A JP 8932180A JP 8932180 A JP8932180 A JP 8932180A JP S5715530 A JPS5715530 A JP S5715530A
Authority
JP
Japan
Prior art keywords
capacitor
power supply
turns
timer circuit
response signal
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
JP8932180A
Other languages
Japanese (ja)
Other versions
JPS647701B2 (en
Inventor
Susumu Iguchi
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP8932180A priority Critical patent/JPS5715530A/en
Publication of JPS5715530A publication Critical patent/JPS5715530A/en
Publication of JPS647701B2 publication Critical patent/JPS647701B2/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
    • H03K17/28—Modifications for introducing a time delay before switching

Landscapes

  • Electronic Switches (AREA)

Abstract

PURPOSE:To simplify the circuit constitution, by providing the 2nd transistor (TR) controlling the 1st TR together with a capacitor in response to the response signal of a load circuit. CONSTITUTION:When a power supply switch SW is switched to on-state, a capacitor C is connected across the power supply E via resistances R1, R2 and switch SW for charging the capacitor C. A transistor TR1 turns on, power is supplied to a load circuit L via the emitter and collector, and a response signal is given to the base of a TR2. Further, the TR2 turns on and the charge of the capacitor C is discharged. After that, when the circuit L completes the prescribed operation, the response signal to the base of the TR2 is stopped, the TR2 turns off, and the base current of the TR1 flows to the capacitor C.
JP8932180A 1980-07-01 1980-07-01 Power supply timer circuit Granted JPS5715530A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8932180A JPS5715530A (en) 1980-07-01 1980-07-01 Power supply timer circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8932180A JPS5715530A (en) 1980-07-01 1980-07-01 Power supply timer circuit

Publications (2)

Publication Number Publication Date
JPS5715530A true JPS5715530A (en) 1982-01-26
JPS647701B2 JPS647701B2 (en) 1989-02-09

Family

ID=13967397

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8932180A Granted JPS5715530A (en) 1980-07-01 1980-07-01 Power supply timer circuit

Country Status (1)

Country Link
JP (1) JPS5715530A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63276509A (en) * 1987-05-08 1988-11-14 Tokai Techno Kk Method and appratus for regeneration of resin-metal composite material
JPH0223123U (en) * 1988-07-18 1990-02-15

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63276509A (en) * 1987-05-08 1988-11-14 Tokai Techno Kk Method and appratus for regeneration of resin-metal composite material
JPH0223123U (en) * 1988-07-18 1990-02-15

Also Published As

Publication number Publication date
JPS647701B2 (en) 1989-02-09

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