JPS54156458A - Capacitor charging circuit - Google Patents

Capacitor charging circuit

Info

Publication number
JPS54156458A
JPS54156458A JP6525678A JP6525678A JPS54156458A JP S54156458 A JPS54156458 A JP S54156458A JP 6525678 A JP6525678 A JP 6525678A JP 6525678 A JP6525678 A JP 6525678A JP S54156458 A JPS54156458 A JP S54156458A
Authority
JP
Japan
Prior art keywords
potential
power supply
amplifying circuit
terminal
constitution
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
JP6525678A
Other languages
Japanese (ja)
Inventor
Hiroshi Yoshida
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP6525678A priority Critical patent/JPS54156458A/en
Publication of JPS54156458A publication Critical patent/JPS54156458A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
    • H03F1/305—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters in case of switching on or off of a power supply

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Amplifiers (AREA)

Abstract

PURPOSE:To eliminate the excessive input to the load at the power supply application to the amplifying circuit, with a simple constitution, by connecting the costant potential source to the capacitor C via the switching SW element of SCR constitution and determining the charging potential of C with the gate terminal of the SW element. CONSTITUTION:The SW element 10 consisting of SCR is provided with the AC negative feedback amplifying circuit consisting of the amplifying circuit 1, feedback elements 2 and 3, and capacitor C4. The gate electrode 12 of the element 10 and the current input terminal 11 are respectively connected to the constant voltage source. At the application of power supply, since the potential of C4 is close to the ground potential, the element 10 is ON and C4 is rapidly charged up. As C4 is charged up, the charging current decreases, the element 10 is OFF under the hold current, the potential between the terminals 12 and 13 is lower than the threshold voltage, and the element 10 keeps OFF state. Further, a part of the signal conducting the element 10 is picked up from the terminal 14, the output terminal 16 is compulsively made to ground potential to prevent the output at power supply application from being biased to the power supply side.
JP6525678A 1978-05-30 1978-05-30 Capacitor charging circuit Pending JPS54156458A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6525678A JPS54156458A (en) 1978-05-30 1978-05-30 Capacitor charging circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6525678A JPS54156458A (en) 1978-05-30 1978-05-30 Capacitor charging circuit

Publications (1)

Publication Number Publication Date
JPS54156458A true JPS54156458A (en) 1979-12-10

Family

ID=13281640

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6525678A Pending JPS54156458A (en) 1978-05-30 1978-05-30 Capacitor charging circuit

Country Status (1)

Country Link
JP (1) JPS54156458A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58141608U (en) * 1982-03-18 1983-09-24 三洋電機株式会社 differential amplifier circuit
JPS5973818U (en) * 1982-11-10 1984-05-19 三洋電機株式会社 Shock noise prevention circuit
JPS63245004A (en) * 1987-03-31 1988-10-12 Matsushita Electric Ind Co Ltd low frequency amplifier circuit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50122849A (en) * 1974-03-14 1975-09-26

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50122849A (en) * 1974-03-14 1975-09-26

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58141608U (en) * 1982-03-18 1983-09-24 三洋電機株式会社 differential amplifier circuit
JPS5973818U (en) * 1982-11-10 1984-05-19 三洋電機株式会社 Shock noise prevention circuit
JPS63245004A (en) * 1987-03-31 1988-10-12 Matsushita Electric Ind Co Ltd low frequency amplifier circuit

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