JPS57107631A - Generating circuit for initializing signal - Google Patents

Generating circuit for initializing signal

Info

Publication number
JPS57107631A
JPS57107631A JP55184769A JP18476980A JPS57107631A JP S57107631 A JPS57107631 A JP S57107631A JP 55184769 A JP55184769 A JP 55184769A JP 18476980 A JP18476980 A JP 18476980A JP S57107631 A JPS57107631 A JP S57107631A
Authority
JP
Japan
Prior art keywords
capacitor
circuit
resistor
power supply
initializing 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.)
Pending
Application number
JP55184769A
Other languages
Japanese (ja)
Inventor
Yuji Yamamoto
Shigeru Shiragaki
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.)
Azbil Corp
Original Assignee
Azbil 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 Azbil Corp filed Critical Azbil Corp
Priority to JP55184769A priority Critical patent/JPS57107631A/en
Publication of JPS57107631A publication Critical patent/JPS57107631A/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
    • H03K17/22—Modifications for ensuring a predetermined initial state when the supply voltage has been applied
    • 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
    • H03K2017/226—Modifications for ensuring a predetermined initial state when the supply voltage has been applied in bipolar transistor switches

Abstract

PURPOSE:To simplify the circuit constitution, by detecting a voltage of a capacitor at the application of power supply and generating an initializing signal, in an oscillation circuit having a time constant circuit of the capacitor charged with the power supply and a resistor. CONSTITUTION:When a power supply Vcc is applied, a capacitor 2 is charged via a resistor 1 and a capacitor 2 starts charging. When a voltage of the capacitor 2 is increased, an output of a detector 7 becomes a low level from a high level at first. This output becomes an initializing signal. Next, when a Schmitt trigger circuit 3 is inverted and the capacitor 2 is discharged via a resistor 6 and a transistor (TR) 5, the Schmitt trigger circuit is again inverted through the discharge of a certain amount. In this case, the state of the detection circuit 7 is unchanged. The oscillation signal is obtained from the TR5.
JP55184769A 1980-12-25 1980-12-25 Generating circuit for initializing signal Pending JPS57107631A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55184769A JPS57107631A (en) 1980-12-25 1980-12-25 Generating circuit for initializing signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55184769A JPS57107631A (en) 1980-12-25 1980-12-25 Generating circuit for initializing signal

Publications (1)

Publication Number Publication Date
JPS57107631A true JPS57107631A (en) 1982-07-05

Family

ID=16158993

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55184769A Pending JPS57107631A (en) 1980-12-25 1980-12-25 Generating circuit for initializing signal

Country Status (1)

Country Link
JP (1) JPS57107631A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5184558A (en) * 1975-01-21 1976-07-23 Matsushita Electric Ind Co Ltd SUTETSUPUDENATSUHATSUSEIKAIRO

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5184558A (en) * 1975-01-21 1976-07-23 Matsushita Electric Ind Co Ltd SUTETSUPUDENATSUHATSUSEIKAIRO

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