JPS57119525A - Eliminating circuit for impulsive noise - Google Patents

Eliminating circuit for impulsive noise

Info

Publication number
JPS57119525A
JPS57119525A JP56004969A JP496981A JPS57119525A JP S57119525 A JPS57119525 A JP S57119525A JP 56004969 A JP56004969 A JP 56004969A JP 496981 A JP496981 A JP 496981A JP S57119525 A JPS57119525 A JP S57119525A
Authority
JP
Japan
Prior art keywords
impulsive noise
frequency
noise
circuit
desired 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.)
Pending
Application number
JP56004969A
Other languages
Japanese (ja)
Inventor
Noriyuki Azuma
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 JP56004969A priority Critical patent/JPS57119525A/en
Publication of JPS57119525A publication Critical patent/JPS57119525A/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
    • H03G3/345—Muting during a short period of time when noise pulses are detected, i.e. blanking

Landscapes

  • Manipulation Of Pulses (AREA)
  • Noise Elimination (AREA)

Abstract

PURPOSE:To eliminating an impulsive noise by a noise eliminating circuit of simple constitution which eliminates an ignition noise, by providing an impulsive noise amplifying circuit with M-shaped frequency characteristics which have a valley at an intermediate frequency. CONSTITUTION:The frequency characteristics of an impulsive noise amplifying circuit 9' are set to M-shaped band-pass characteristics which are wider than the frequency band of an intermediate-frequency amplifying circuit and have a valley at the intermediate frequency of a desired signal system. Consequently, an impulsive noise is separated from a desired signal and detected. For this purpose, the separated pulse signal is supplied to a gate circuit 5 to eliminate the impulsive noise without reference to the relative level between the impulsive noise and desired signal.
JP56004969A 1981-01-19 1981-01-19 Eliminating circuit for impulsive noise Pending JPS57119525A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56004969A JPS57119525A (en) 1981-01-19 1981-01-19 Eliminating circuit for impulsive noise

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56004969A JPS57119525A (en) 1981-01-19 1981-01-19 Eliminating circuit for impulsive noise

Publications (1)

Publication Number Publication Date
JPS57119525A true JPS57119525A (en) 1982-07-26

Family

ID=11598415

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56004969A Pending JPS57119525A (en) 1981-01-19 1981-01-19 Eliminating circuit for impulsive noise

Country Status (1)

Country Link
JP (1) JPS57119525A (en)

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