JPS57166709A - Amplifier - Google Patents

Amplifier

Info

Publication number
JPS57166709A
JPS57166709A JP5218681A JP5218681A JPS57166709A JP S57166709 A JPS57166709 A JP S57166709A JP 5218681 A JP5218681 A JP 5218681A JP 5218681 A JP5218681 A JP 5218681A JP S57166709 A JPS57166709 A JP S57166709A
Authority
JP
Japan
Prior art keywords
gain
low
collector
variable resistor
amplifier
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
JP5218681A
Other languages
Japanese (ja)
Other versions
JPH0130325B2 (en
Inventor
Nobuhiko Takahashi
Masataka Arimune
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.)
DX Antenna Co Ltd
Original Assignee
DX Antenna 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 DX Antenna Co Ltd filed Critical DX Antenna Co Ltd
Priority to JP5218681A priority Critical patent/JPS57166709A/en
Publication of JPS57166709A publication Critical patent/JPS57166709A/en
Publication of JPH0130325B2 publication Critical patent/JPH0130325B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Control Of Amplification And Gain Control (AREA)
  • Amplifiers (AREA)

Abstract

PURPOSE: To improve the noise factor characteristics of the high frequency amplifier of a household booster, etc., when its gain is maximized, by connecting a DC power source to the output electrode of a transistor (TR) through a variable resistor, and the arm of the variable resistor to an output terminal.
CONSTITUTION: An input terminal 20 is connected to the base of NPN TR24 through a capacitor (C) 22, and its emitter is grounded. The base and collector of the TR24 are connected mutually through a resistance (R) 26, and the collector is connected to a +Vcc through a series circuit of a variable resistor (VR) 28 and an R30. The arm of the VR28 is connected to the collector of the TR24 through an R32 and also connected to an output terminal 36 through a C34. Consequently, a gain, a Vce, and an IC are adjusted through the operation of the R28, and an amplifier, therefore, has a high gain and a low noise when an input level is low, and a low gain and low distortion when high.
COPYRIGHT: (C)1982,JPO&Japio
JP5218681A 1981-04-06 1981-04-06 Amplifier Granted JPS57166709A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5218681A JPS57166709A (en) 1981-04-06 1981-04-06 Amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5218681A JPS57166709A (en) 1981-04-06 1981-04-06 Amplifier

Publications (2)

Publication Number Publication Date
JPS57166709A true JPS57166709A (en) 1982-10-14
JPH0130325B2 JPH0130325B2 (en) 1989-06-19

Family

ID=12907767

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5218681A Granted JPS57166709A (en) 1981-04-06 1981-04-06 Amplifier

Country Status (1)

Country Link
JP (1) JPS57166709A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007221331A (en) * 2006-02-15 2007-08-30 Dx Antenna Co Ltd High-frequency amplifier

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007221331A (en) * 2006-02-15 2007-08-30 Dx Antenna Co Ltd High-frequency amplifier

Also Published As

Publication number Publication date
JPH0130325B2 (en) 1989-06-19

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