JPS5477506A - Disturbance signal suppression circuit for fm radio receiver - Google Patents

Disturbance signal suppression circuit for fm radio receiver

Info

Publication number
JPS5477506A
JPS5477506A JP14528177A JP14528177A JPS5477506A JP S5477506 A JPS5477506 A JP S5477506A JP 14528177 A JP14528177 A JP 14528177A JP 14528177 A JP14528177 A JP 14528177A JP S5477506 A JPS5477506 A JP S5477506A
Authority
JP
Japan
Prior art keywords
circuit
signal
output
disturbance
disturbance signal
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
JP14528177A
Other languages
Japanese (ja)
Other versions
JPS5614011B2 (en
Inventor
Hideo Kawabata
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP14528177A priority Critical patent/JPS5477506A/en
Publication of JPS5477506A publication Critical patent/JPS5477506A/en
Publication of JPS5614011B2 publication Critical patent/JPS5614011B2/ja
Granted 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
    • H03G3/34—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems
    • H03G3/345—Muting during a short period of time when noise pulses are detected, i.e. blanking

Landscapes

  • Noise Elimination (AREA)

Abstract

PURPOSE:To ensure the effective suppression of the disturbance signal by controlling the frequency bands of the disturbance signals in accordance with the reception field. CONSTITUTION:The output of tuner 1 is introduced to the field intensity detecting circuit to obtain the control signal corresponding to the input field or the tuning condition. With this control signal, the active frequency band of circuit 6' which detects the disturbance signal from the output of FM detector 2 is controlled to be widen when the reception level is high and to be narrowed when the reception level is low respectively. And the control signal is generated from circuit 6' when the disturbance signal is detected to control gate 4. Thus, the output of delay amplifier circuit 3 is prevented from being supplied to output circuit 5. In this case, the signal given from signal holding circuit 8 is supplied to output circuit 5.
JP14528177A 1977-12-02 1977-12-02 Disturbance signal suppression circuit for fm radio receiver Granted JPS5477506A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14528177A JPS5477506A (en) 1977-12-02 1977-12-02 Disturbance signal suppression circuit for fm radio receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14528177A JPS5477506A (en) 1977-12-02 1977-12-02 Disturbance signal suppression circuit for fm radio receiver

Publications (2)

Publication Number Publication Date
JPS5477506A true JPS5477506A (en) 1979-06-21
JPS5614011B2 JPS5614011B2 (en) 1981-04-01

Family

ID=15381501

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14528177A Granted JPS5477506A (en) 1977-12-02 1977-12-02 Disturbance signal suppression circuit for fm radio receiver

Country Status (1)

Country Link
JP (1) JPS5477506A (en)

Also Published As

Publication number Publication date
JPS5614011B2 (en) 1981-04-01

Similar Documents

Publication Publication Date Title
JPS5560343A (en) Receiver
DE58906783D1 (en) FM BROADCAST RECEIVER.
GB1295380A (en)
GB1525897A (en) Blanker inhibit circuit in a radio receiver
JPS55150624A (en) Agc system of fm receiver
JPS5477506A (en) Disturbance signal suppression circuit for fm radio receiver
JPS5230309A (en) Tuner
JPS54140442A (en) Automatic sensitivity control circuit for receiver
GB960836A (en) Improvements in radar receivers incorporating interference suppression circuits
JPS57170617A (en) Receiver
JPS5595425A (en) Malfunction preventive unit of television receiver
JPS566542A (en) Muting system for fm radio receiver
JPS5582543A (en) Fm receiver
JPS5579538A (en) Tuner unit of television receiver
JPS5547740A (en) Fm receiver
JPS55140337A (en) Intermodulation disturbance improving circuit of radio receiver
JPS55162637A (en) Fm receiver
JPS57201378A (en) Video synchronization detecting device and phase correcting device
JPS57121377A (en) Video intermediate frequency circuit for television receiver
JPS5486291A (en) Radio direction detector
JPS56106435A (en) Fm receiver
JPS5644212A (en) Agc circuit
JPS54152414A (en) Squelch system of fm mobile radio equipment
JPS5238823A (en) Agc circuit of television receiver
JPS57162842A (en) Receiver