JPS57182684A - Timer - Google Patents

Timer

Info

Publication number
JPS57182684A
JPS57182684A JP6918781A JP6918781A JPS57182684A JP S57182684 A JPS57182684 A JP S57182684A JP 6918781 A JP6918781 A JP 6918781A JP 6918781 A JP6918781 A JP 6918781A JP S57182684 A JPS57182684 A JP S57182684A
Authority
JP
Japan
Prior art keywords
period
timer
thyristor
capacitor
semi
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
JP6918781A
Other languages
Japanese (ja)
Inventor
Shoji Tsuchiya
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP6918781A priority Critical patent/JPS57182684A/en
Publication of JPS57182684A publication Critical patent/JPS57182684A/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
    • H03K17/292—Modifications for introducing a time delay before switching in thyristor, unijunction transistor or programmable unijunction transistor switches

Abstract

PURPOSE:To form a timer of a comparative long time limit by a simple circuit, by converting the charge accumulated in a capacitor to a pulse current synchronizing with supply voltage, and applying it to the gate of an Ac thyristor. CONSTITUTION:This timer is constituted so that to the base of a transistor 13, a pulse current of suitable phase is applied at its every semi-period against AC supply voltage. When a switch 9 is closed in this state, a capacitor 8 is charged at every 1 period in which forward voltage is applied to diodes 10, 7, is discharged at every semi-period through the gate of an AC thyristor 4 by the transistor 13, and almost constant potential is held at a place where the quantity of discharge and the quantity of charge are balanced. When the switch 9 is opened in this state, the capacitor 8 is not charged, and the AC thyristor 4 is turned on continuously for a constant interval of time, discharging the accumulated charge in order at every semi-period. According to such a constitution, it is possible to obtain a timer of a comparatively long time limit by a simple circuit.
JP6918781A 1981-05-07 1981-05-07 Timer Pending JPS57182684A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6918781A JPS57182684A (en) 1981-05-07 1981-05-07 Timer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6918781A JPS57182684A (en) 1981-05-07 1981-05-07 Timer

Publications (1)

Publication Number Publication Date
JPS57182684A true JPS57182684A (en) 1982-11-10

Family

ID=13395466

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6918781A Pending JPS57182684A (en) 1981-05-07 1981-05-07 Timer

Country Status (1)

Country Link
JP (1) JPS57182684A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9287770B1 (en) 2014-09-04 2016-03-15 Martin Kanner Analog timer circuit with time constant multiplication effect
US9631838B2 (en) 2015-02-04 2017-04-25 Martin Kanner Boiler control comprising analog up/down timer circuit for generating variable threshold signal

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9287770B1 (en) 2014-09-04 2016-03-15 Martin Kanner Analog timer circuit with time constant multiplication effect
US9631838B2 (en) 2015-02-04 2017-04-25 Martin Kanner Boiler control comprising analog up/down timer circuit for generating variable threshold signal
US10247426B2 (en) 2015-02-04 2019-04-02 Martin Kanner Boiler control comprising analog up/down timer circuit for generating variable threshold signal

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