JPS56123024A - Power supply circuit - Google Patents

Power supply circuit

Info

Publication number
JPS56123024A
JPS56123024A JP2717580A JP2717580A JPS56123024A JP S56123024 A JPS56123024 A JP S56123024A JP 2717580 A JP2717580 A JP 2717580A JP 2717580 A JP2717580 A JP 2717580A JP S56123024 A JPS56123024 A JP S56123024A
Authority
JP
Japan
Prior art keywords
power supply
load
approximately
voltage
microcomputer
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
JP2717580A
Other languages
Japanese (ja)
Other versions
JPS6017121B2 (en
Inventor
Mitsuo Morihisa
Norio Rokushiya
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.)
Sharp Corp
Original Assignee
Sharp 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 Sharp Corp filed Critical Sharp Corp
Priority to JP55027175A priority Critical patent/JPS6017121B2/en
Publication of JPS56123024A publication Critical patent/JPS56123024A/en
Publication of JPS6017121B2 publication Critical patent/JPS6017121B2/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Power Sources (AREA)
  • Direct Current Feeding And Distribution (AREA)
  • Electronic Switches (AREA)

Abstract

PURPOSE:To prevent the noise and increment of the number of parts in the power supply part for microcomputer, by adding a means, which is switched when the output voltage reaches a value sufficient for the load, between the recifier and the load. CONSTITUTION:It is necessary that all counter are cleared temporarily (auto- clear function) at the power supply time in the device using a microcomputer. This auto-clear function is executed by the high-speed voltage rise (10ms or less). In this power supply circuit, the circuit surrounded with broken line 8 is provided between rectifier 2 and load 4, in the concrete, between bulk smoothing capacitor 3 and three-terminal regulator 5. When voltage VR1 reaches the threshold voltage (approximately 0.7V) of switching transistor TR11 according to power supply, TR11 is turned on, and simultaneously, it exceeds the threshold voltage (approximately 2.5V) of transistor driver 13, and therefore, switching TR11 and transistor driver 13 are turned on simultaneously approximately, so that the prescribed output voltage of a rapid rise is applied to load 4.
JP55027175A 1980-03-03 1980-03-03 power circuit Expired JPS6017121B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55027175A JPS6017121B2 (en) 1980-03-03 1980-03-03 power circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55027175A JPS6017121B2 (en) 1980-03-03 1980-03-03 power circuit

Publications (2)

Publication Number Publication Date
JPS56123024A true JPS56123024A (en) 1981-09-26
JPS6017121B2 JPS6017121B2 (en) 1985-05-01

Family

ID=12213723

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55027175A Expired JPS6017121B2 (en) 1980-03-03 1980-03-03 power circuit

Country Status (1)

Country Link
JP (1) JPS6017121B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5935220A (en) * 1982-08-23 1984-02-25 Sony Magnescale Inc Countermeasure circuit to instantaneous break of power source

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5935220A (en) * 1982-08-23 1984-02-25 Sony Magnescale Inc Countermeasure circuit to instantaneous break of power source

Also Published As

Publication number Publication date
JPS6017121B2 (en) 1985-05-01

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