JPS5466749A - Antenna input circuit of high frequency amplification circuit - Google Patents

Antenna input circuit of high frequency amplification circuit

Info

Publication number
JPS5466749A
JPS5466749A JP13371577A JP13371577A JPS5466749A JP S5466749 A JPS5466749 A JP S5466749A JP 13371577 A JP13371577 A JP 13371577A JP 13371577 A JP13371577 A JP 13371577A JP S5466749 A JPS5466749 A JP S5466749A
Authority
JP
Japan
Prior art keywords
input
base
voltage
capacitor
coil
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
JP13371577A
Other languages
Japanese (ja)
Other versions
JPS598085B2 (en
Inventor
Masabumi Serizawa
Kiyotake Fukui
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 JP13371577A priority Critical patent/JPS598085B2/en
Publication of JPS5466749A publication Critical patent/JPS5466749A/en
Publication of JPS598085B2 publication Critical patent/JPS598085B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Control Of Amplification And Gain Control (AREA)

Abstract

PURPOSE: To establish the input circuit withstanding the large input signal, by taking the high frequency amplifying circuit as non-tuning input system, reducing the capacitance of capacitive antenna equivalently, obtaining high gain and remarkable delay AGC, and preventing large signal input distortion.
CONSTITUTION: The input terminal 2 applying the signal voltage to the input electrode of the active element 1 high in the input impedance is connected to one end of the coil 3, and the common electrode is connected to the reference potential point 14 via the low resistor 15. Further, between another end of the coil 3 and the reference voltage point 14, the AGC transistor 6 in which the capacitor 10 is connected between the base and emitter and the attenuation Tr6 connecting the atenuation capacitor 19 between the base of the element 1 and the reference voltage point 14 are provided. The collector of Tr5 and the base of Tr6 are directly coupled and a bias voltage is applied with the voltage stabilizing element 7. Bias and AGC voltage are fed to the element 1 via the high resistor 9 at the junction 4 of the base of Tr5 and the coil 3, and the capacitor 10 determining the time constant of Tr6 is inserted between the base and collector of Tr5.
COPYRIGHT: (C)1979,JPO&Japio
JP13371577A 1977-11-07 1977-11-07 Antenna input circuit of high frequency amplifier circuit Expired JPS598085B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13371577A JPS598085B2 (en) 1977-11-07 1977-11-07 Antenna input circuit of high frequency amplifier circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13371577A JPS598085B2 (en) 1977-11-07 1977-11-07 Antenna input circuit of high frequency amplifier circuit

Publications (2)

Publication Number Publication Date
JPS5466749A true JPS5466749A (en) 1979-05-29
JPS598085B2 JPS598085B2 (en) 1984-02-22

Family

ID=15111198

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13371577A Expired JPS598085B2 (en) 1977-11-07 1977-11-07 Antenna input circuit of high frequency amplifier circuit

Country Status (1)

Country Link
JP (1) JPS598085B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6079825U (en) * 1983-11-07 1985-06-03 ローム株式会社 amplifier circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6079825U (en) * 1983-11-07 1985-06-03 ローム株式会社 amplifier circuit
JPH0339934Y2 (en) * 1983-11-07 1991-08-22

Also Published As

Publication number Publication date
JPS598085B2 (en) 1984-02-22

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