JPS55125708A - Radio receiver - Google Patents

Radio receiver

Info

Publication number
JPS55125708A
JPS55125708A JP3478479A JP3478479A JPS55125708A JP S55125708 A JPS55125708 A JP S55125708A JP 3478479 A JP3478479 A JP 3478479A JP 3478479 A JP3478479 A JP 3478479A JP S55125708 A JPS55125708 A JP S55125708A
Authority
JP
Japan
Prior art keywords
circuit
diodes
load
antenna
input
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
JP3478479A
Other languages
Japanese (ja)
Inventor
Mitsuzo Shimomura
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.)
Sharp Corp
Original Assignee
Sharp Corp
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 Sharp Corp filed Critical Sharp Corp
Priority to JP3478479A priority Critical patent/JPS55125708A/en
Publication of JPS55125708A publication Critical patent/JPS55125708A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3036—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers

Landscapes

  • Control Of Amplification And Gain Control (AREA)

Abstract

PURPOSE:To prevent abnormal phenomena such as distortion of input signal and oscillation, by providing the variable resistive element to the load of the antenna circuit and reducing the load to excessive input of the antenna circuit by applying the output of the intermediate frequency amplifying circuit to the variable resistive element. CONSTITUTION:When te reception signal level inputted to the antenna circuit 1 exceeds a given value, the positive voltage having the level corresponding to the reception signal is produced at the output terminal 82 of the intermediate frequency amplifying circuit 8 and it is fed to the diodes 5, 4 via the resistor 9. The diodes 5, 4 are operated so that the resistance characteristics can be reduced depending on the amplitude of the positive voltage. The resistance value of the diodes 5, 4 is reduced to reduce the load of the circuit 1, and the production of the distorted voltage at the variable capacitor 11 is suppressed even with greater reception input to the antenna, allowing to avoid the oscillation in the circuit 1.
JP3478479A 1979-03-23 1979-03-23 Radio receiver Pending JPS55125708A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3478479A JPS55125708A (en) 1979-03-23 1979-03-23 Radio receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3478479A JPS55125708A (en) 1979-03-23 1979-03-23 Radio receiver

Publications (1)

Publication Number Publication Date
JPS55125708A true JPS55125708A (en) 1980-09-27

Family

ID=12423896

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3478479A Pending JPS55125708A (en) 1979-03-23 1979-03-23 Radio receiver

Country Status (1)

Country Link
JP (1) JPS55125708A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0660511A2 (en) * 1993-12-27 1995-06-28 Ford Motor Company Automatic gain control in radio receivers

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5011428B1 (en) * 1970-12-29 1975-05-01

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5011428B1 (en) * 1970-12-29 1975-05-01

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0660511A2 (en) * 1993-12-27 1995-06-28 Ford Motor Company Automatic gain control in radio receivers
EP0660511A3 (en) * 1993-12-27 1996-07-03 Ford Motor Co Automatic gain control in radio receivers.

Similar Documents

Publication Publication Date Title
TW291625B (en) Tuned amplifier
KR910010897A (en) AM radio receiver
US3023369A (en) Variable-gain transistor circuit
JPS55125708A (en) Radio receiver
GB1273315A (en) Signal overload compensation circuit for antenna tuning system
JPS55104152A (en) Am stereo demodulation circuit
GB988800A (en) Improvements in or relating to electrically tunable resonant circuit arrangements
JPS5642444A (en) Zone switching system of mobile radio communication
GB925852A (en) Frequency-selective amplifier circuit
JPS5685944A (en) Wide band receiving circuit for optical communication
JPS6465921A (en) Waveform shaping circuit
SU754646A1 (en) Amplifier with correction of non-linear distortions
ATE13117T1 (en) CIRCUIT ARRANGEMENT FOR DETERMINING THE RECEPTION QUALITY FOR AN FM RECEIVER.
JPS55117316A (en) Frequency discriminating circuit
JPS5547740A (en) Fm receiver
JPS5478053A (en) Filter circuit
JPS5742240A (en) Squeltch circuit
JPS5287310A (en) Input tuning circuit in television receiver etc.
JPS5619219A (en) Stop signal generating circuit for automatic tuning receiver
JPS55136730A (en) Selection circuit for reception band
GB1114606A (en) Wave transmission network
GB1035391A (en) Voltage variable capacitor circuit
JPS5671319A (en) Equalizer of variable amplitude
JPS5612117A (en) Variable phase shifter
JPS57196635A (en) Input circuit for radio receiver