JPS55143807A - Bias circuit of linear amplifier - Google Patents

Bias circuit of linear amplifier

Info

Publication number
JPS55143807A
JPS55143807A JP5143979A JP5143979A JPS55143807A JP S55143807 A JPS55143807 A JP S55143807A JP 5143979 A JP5143979 A JP 5143979A JP 5143979 A JP5143979 A JP 5143979A JP S55143807 A JPS55143807 A JP S55143807A
Authority
JP
Japan
Prior art keywords
current
precharge
feeding
circuit
emitters
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
JP5143979A
Other languages
Japanese (ja)
Inventor
Noriji Ito
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP5143979A priority Critical patent/JPS55143807A/en
Publication of JPS55143807A publication Critical patent/JPS55143807A/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)
  • Amplifiers (AREA)

Abstract

PURPOSE:To control a precharging current to suppress generation of pop noise and so on, by inserting a current Miller circuit among a feeding source, a bias means and a precharge means. CONSTITUTION:Transistors Q124 and Q123 for current Miller constitution are inserted among feeding circuit 100, a bias means, and a precharge means. When resistances R121 and R122 are so selected that R121=R122 may be true and prescribed bias potential VS is set to the half of feeding potential VC, sum 2VBE of voltage between bases and emitters of transistors Q121 and Q124 is compensated by the sum of voltages between bases and emitters of Q122 and Q123. Meanwhile, collector current I12 of Q124 is given by (VC-4VBE)/(R121+R122), and the collector current of Q148, namely, precharge current I1+I12 becomes KI12 on a basis of the property of the current Miller circuit, however, constant K is determined by the ratio of emitter areas of Q124 and Q148. Consequently, if current I12 is set in this manner, the precharge current is controlled automatically, so that generation of pop noise and so on can be suppressed.
JP5143979A 1979-04-27 1979-04-27 Bias circuit of linear amplifier Pending JPS55143807A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5143979A JPS55143807A (en) 1979-04-27 1979-04-27 Bias circuit of linear amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5143979A JPS55143807A (en) 1979-04-27 1979-04-27 Bias circuit of linear amplifier

Publications (1)

Publication Number Publication Date
JPS55143807A true JPS55143807A (en) 1980-11-10

Family

ID=12886953

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5143979A Pending JPS55143807A (en) 1979-04-27 1979-04-27 Bias circuit of linear amplifier

Country Status (1)

Country Link
JP (1) JPS55143807A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57178405A (en) * 1981-04-06 1982-11-02 Philips Nv Amplifier
JPS59148410A (en) * 1983-02-15 1984-08-25 Nec Corp Power amplifier
JPS6162422U (en) * 1984-09-28 1986-04-26
JPS62101105A (en) * 1985-10-28 1987-05-11 Honda Motor Co Ltd Method of starting ultra-low frequency amplifier circuit
JPS6284217U (en) * 1985-11-11 1987-05-29
JP2006296086A (en) * 2005-04-11 2006-10-26 Minebea-Matsushita Motor Corp Stepping motor with lead screw

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4841653A (en) * 1971-09-27 1973-06-18

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4841653A (en) * 1971-09-27 1973-06-18

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57178405A (en) * 1981-04-06 1982-11-02 Philips Nv Amplifier
JPS59148410A (en) * 1983-02-15 1984-08-25 Nec Corp Power amplifier
JPH0458201B2 (en) * 1983-02-15 1992-09-16 Nippon Electric Co
JPS6162422U (en) * 1984-09-28 1986-04-26
JPS62101105A (en) * 1985-10-28 1987-05-11 Honda Motor Co Ltd Method of starting ultra-low frequency amplifier circuit
JPS6284217U (en) * 1985-11-11 1987-05-29
JP2006296086A (en) * 2005-04-11 2006-10-26 Minebea-Matsushita Motor Corp Stepping motor with lead screw

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