JPS57152020A - Power supply circuit for device with small sized printer - Google Patents

Power supply circuit for device with small sized printer

Info

Publication number
JPS57152020A
JPS57152020A JP56037610A JP3761081A JPS57152020A JP S57152020 A JPS57152020 A JP S57152020A JP 56037610 A JP56037610 A JP 56037610A JP 3761081 A JP3761081 A JP 3761081A JP S57152020 A JPS57152020 A JP S57152020A
Authority
JP
Japan
Prior art keywords
voltage
circuit
power supply
terminal
battery
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
JP56037610A
Other languages
Japanese (ja)
Inventor
Hisao Sato
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.)
SHINSHIYUU SEIKI KK
Seiko Epson Corp
Suwa Seikosha KK
Epson Corp
Original Assignee
SHINSHIYUU SEIKI KK
Seiko Epson Corp
Suwa Seikosha KK
Epson 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 SHINSHIYUU SEIKI KK, Seiko Epson Corp, Suwa Seikosha KK, Epson Corp filed Critical SHINSHIYUU SEIKI KK
Priority to JP56037610A priority Critical patent/JPS57152020A/en
Publication of JPS57152020A publication Critical patent/JPS57152020A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
    • G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
    • G05F1/565—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor
    • G05F1/569—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for protection
    • G05F1/571—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for protection with overvoltage detector

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
  • Electronic Switches (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Continuous-Control Power Sources That Use Transistors (AREA)

Abstract

PURPOSE:To achieve the function and safety with low cost, by inserting a transistor (TR) with a positive feedback circuit between a battery and a stabilized power supply circuit and interrupting a current to the stabilized power supply circuit when a battery voltage is dropped. CONSTITUTION:The collector and the emitter of a control TR11 are respectively connected between a battery 1 and a power supply terminal 14 of a stabilized power supply circuit 7. A voltage dividing a battery voltage with a resistor 10 is applied to the base of the TR11 and positive feedback is performed from an output terminal 15 of the circuit 7 via a resistor 12. A power supply is supplied to an MOS-LSI 8 from the terminal 15 of the circuit 7. If the battery voltage is lowered and the base of the TR11 does not reach a cut-in voltage, since no bias current of the circuit 7 flows, a voltage at the terminal 15 is zero. If the battery voltage is high, a current flows to the collector of the TR11, the circuit 7 is operated and the voltage at the terminal 15. Since this voltage increase is positive-fed-back with the resistor 12, the circuit 7 is rapidly at normal operation. Inversely, if the battery voltage is lowered than a prescribed value, the voltage at the terminal 15 is zero with hysteresis.
JP56037610A 1981-03-16 1981-03-16 Power supply circuit for device with small sized printer Pending JPS57152020A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56037610A JPS57152020A (en) 1981-03-16 1981-03-16 Power supply circuit for device with small sized printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56037610A JPS57152020A (en) 1981-03-16 1981-03-16 Power supply circuit for device with small sized printer

Publications (1)

Publication Number Publication Date
JPS57152020A true JPS57152020A (en) 1982-09-20

Family

ID=12502359

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56037610A Pending JPS57152020A (en) 1981-03-16 1981-03-16 Power supply circuit for device with small sized printer

Country Status (1)

Country Link
JP (1) JPS57152020A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59143669A (en) * 1983-02-07 1984-08-17 Matsushita Electric Ind Co Ltd Printing device
JPS6250180A (en) * 1985-08-29 1987-03-04 Mitsubishi Electric Corp Thermal head drive unit
JPS6488612A (en) * 1987-09-29 1989-04-03 Furuno Electric Co Dc voltage stabilized power source device
JPH04263303A (en) * 1991-02-18 1992-09-18 Sharp Corp Dc stabilized power unit

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59143669A (en) * 1983-02-07 1984-08-17 Matsushita Electric Ind Co Ltd Printing device
JPH0461783B2 (en) * 1983-02-07 1992-10-02 Matsushita Electric Ind Co Ltd
JPS6250180A (en) * 1985-08-29 1987-03-04 Mitsubishi Electric Corp Thermal head drive unit
JPH0557916B2 (en) * 1985-08-29 1993-08-25 Mitsubishi Electric Corp
JPS6488612A (en) * 1987-09-29 1989-04-03 Furuno Electric Co Dc voltage stabilized power source device
JPH04263303A (en) * 1991-02-18 1992-09-18 Sharp Corp Dc stabilized power unit

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