JPS57141718A - Up-down remote controlling receiver by squelch operating level - Google Patents

Up-down remote controlling receiver by squelch operating level

Info

Publication number
JPS57141718A
JPS57141718A JP2729681A JP2729681A JPS57141718A JP S57141718 A JPS57141718 A JP S57141718A JP 2729681 A JP2729681 A JP 2729681A JP 2729681 A JP2729681 A JP 2729681A JP S57141718 A JPS57141718 A JP S57141718A
Authority
JP
Japan
Prior art keywords
signal
squelch
outputted
given
inputted
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
JP2729681A
Other languages
Japanese (ja)
Inventor
Toshio Nakagawa
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.)
Fujitsu General Ltd
Aerojet Rocketdyne Holdings Inc
Original Assignee
Fujitsu General Ltd
Gencorp Inc
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 Fujitsu General Ltd, Gencorp Inc filed Critical Fujitsu General Ltd
Priority to JP2729681A priority Critical patent/JPS57141718A/en
Publication of JPS57141718A publication Critical patent/JPS57141718A/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
    • H03G3/34—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

Landscapes

  • Noise Elimination (AREA)

Abstract

PURPOSE:To quicken squelch operating speed, by counting the number of pulses within a set reference time for inputted control signals and increasing or decreasing the squelch operation based on the number of counts. CONSTITUTION:A timer circuit 2 sets a time of a timer according to the number of pulses within a prescribed time T. One pulse signal is outputted from a monostable multivibrator 7 with one operation of the circuit 2 and a clock signal is given to a counter 8. A monostable multivibrator 3 is triggered with an input signal from an input terminal 1 and given to a binary counter 4, this output is applied to a gate circuit 5 and a set signal is outputted. This set signal is inputted to an FF6, the output goes to H level and is given to the counter 8, the clock signal is set to up-operation and outputted from a decoder 9. On the other hand, similar setting is made when a remote control signal for squelch operation level down is inputted.
JP2729681A 1981-02-26 1981-02-26 Up-down remote controlling receiver by squelch operating level Pending JPS57141718A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2729681A JPS57141718A (en) 1981-02-26 1981-02-26 Up-down remote controlling receiver by squelch operating level

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2729681A JPS57141718A (en) 1981-02-26 1981-02-26 Up-down remote controlling receiver by squelch operating level

Publications (1)

Publication Number Publication Date
JPS57141718A true JPS57141718A (en) 1982-09-02

Family

ID=12217119

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2729681A Pending JPS57141718A (en) 1981-02-26 1981-02-26 Up-down remote controlling receiver by squelch operating level

Country Status (1)

Country Link
JP (1) JPS57141718A (en)

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