JPS5466749A - Antenna input circuit of high frequency amplification circuit - Google Patents
Antenna input circuit of high frequency amplification circuitInfo
- 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
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
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)
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 |
-
1977
- 1977-11-07 JP JP13371577A patent/JPS598085B2/en not_active Expired
Cited By (2)
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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