JPS5494859A - Amplifier - Google Patents

Amplifier

Info

Publication number
JPS5494859A
JPS5494859A JP212678A JP212678A JPS5494859A JP S5494859 A JPS5494859 A JP S5494859A JP 212678 A JP212678 A JP 212678A JP 212678 A JP212678 A JP 212678A JP S5494859 A JPS5494859 A JP S5494859A
Authority
JP
Japan
Prior art keywords
output
tuning
impedance
attenuator
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
JP212678A
Other languages
Japanese (ja)
Other versions
JPS585603B2 (en
Inventor
Joji Kane
Masato Moriwaki
Michio Okamoto
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP212678A priority Critical patent/JPS585603B2/en
Publication of JPS5494859A publication Critical patent/JPS5494859A/en
Publication of JPS585603B2 publication Critical patent/JPS585603B2/en
Expired 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
    • H03F1/08—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements
    • H03F1/12—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements by use of attenuating means

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Amplification And Gain Control (AREA)
  • Amplifiers (AREA)

Abstract

PURPOSE:To keep constant the amplification factor independently of the tuning frequency, by correcting the attenuation of attenuator for the change in the amplification factor due to variable frequency for the amplifier used at VHF band. CONSTITUTION:The input from the input terminal 2 is amplified at the tuning amplifier 1 using voltage dependancy variable reactance element (Varicap etc.) and it is outputted from the output terminal 7 after being level-corrected at the attenuator 6. The tuning frequency of the tuning amplifier 1 is controlled with the output voltage of the tuning controller 3, and a part of the output of the tuning controller 3 is inputted to the impedance converter 5 via the semi-fixed variable voltage dividing ratio 4 which can be set for arbitrary voltage dividing ratio. This converter 5 has higher input impedance and lower output impedance. The emitter follower circuit of transistors is used, and the low impedance output of the converter 5 acts as the drive output controlling the attenuation of the attenuator 6.
JP212678A 1978-01-11 1978-01-11 Width increasing device Expired JPS585603B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP212678A JPS585603B2 (en) 1978-01-11 1978-01-11 Width increasing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP212678A JPS585603B2 (en) 1978-01-11 1978-01-11 Width increasing device

Publications (2)

Publication Number Publication Date
JPS5494859A true JPS5494859A (en) 1979-07-26
JPS585603B2 JPS585603B2 (en) 1983-02-01

Family

ID=11520640

Family Applications (1)

Application Number Title Priority Date Filing Date
JP212678A Expired JPS585603B2 (en) 1978-01-11 1978-01-11 Width increasing device

Country Status (1)

Country Link
JP (1) JPS585603B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60117835U (en) * 1984-01-20 1985-08-09 佐藤　幹夫 decorative glass

Also Published As

Publication number Publication date
JPS585603B2 (en) 1983-02-01

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