JPS55166340A - Switching circuit - Google Patents

Switching circuit

Info

Publication number
JPS55166340A
JPS55166340A JP5847479A JP5847479A JPS55166340A JP S55166340 A JPS55166340 A JP S55166340A JP 5847479 A JP5847479 A JP 5847479A JP 5847479 A JP5847479 A JP 5847479A JP S55166340 A JPS55166340 A JP S55166340A
Authority
JP
Japan
Prior art keywords
load
con
resistance
led
capacitor
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
JP5847479A
Other languages
Japanese (ja)
Other versions
JPS5932927B2 (en
Inventor
Masatoshi Miyahara
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 JP5847479A priority Critical patent/JPS5932927B2/en
Publication of JPS55166340A publication Critical patent/JPS55166340A/en
Publication of JPS5932927B2 publication Critical patent/JPS5932927B2/en
Expired 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
    • H03K17/18—Modifications for indicating state of switch

Landscapes

  • Electronic Switches (AREA)

Abstract

PURPOSE:To ensure the assured working of the load as well as realize the confirmation of the state under which the output of the transistor is supplied to the load, by securing the connection via the serial circuit of the resistance and the capacitor among the collector of the transistor, the cathode of LED and the load each. CONSTITUTION:When transistor TR is off, the voltage is supplied to the load from power source P via resistance r1, capacitor Con and resistance r2 each. As a result, capacitor Con is charged with the time constant of Cx(R1+R2), where C shows the capacitor of Con and R1 and R2 shown the resistance value of resistances r1 and r2 respectively. Now if TR is turned on, the charge stored in Con is discharged with the time constant of CxR2 and via TR, LED and resistance r2 each. Thus the LED glows. In case Con has a conduction fault, the charge/discharge of Con is discontinued. Thus the LED is kept off to secure the fail-safe performance of the circuit. As a result, the assured working is ensured for the load although the DTL or TTL may be connected to the load, at the same time realizing the confirmation of the state under which the output of the TR is supplied to the load.
JP5847479A 1979-05-10 1979-05-10 switching circuit Expired JPS5932927B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5847479A JPS5932927B2 (en) 1979-05-10 1979-05-10 switching circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5847479A JPS5932927B2 (en) 1979-05-10 1979-05-10 switching circuit

Publications (2)

Publication Number Publication Date
JPS55166340A true JPS55166340A (en) 1980-12-25
JPS5932927B2 JPS5932927B2 (en) 1984-08-11

Family

ID=13085421

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5847479A Expired JPS5932927B2 (en) 1979-05-10 1979-05-10 switching circuit

Country Status (1)

Country Link
JP (1) JPS5932927B2 (en)

Also Published As

Publication number Publication date
JPS5932927B2 (en) 1984-08-11

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