FR2490856B1 - APPARATUS FOR REDUCING BACKGROUND NOISE OF THE REAL-TIME SPECTRAL ANALYSIS TYPE - Google Patents

APPARATUS FOR REDUCING BACKGROUND NOISE OF THE REAL-TIME SPECTRAL ANALYSIS TYPE

Info

Publication number
FR2490856B1
FR2490856B1 FR8020299A FR8020299A FR2490856B1 FR 2490856 B1 FR2490856 B1 FR 2490856B1 FR 8020299 A FR8020299 A FR 8020299A FR 8020299 A FR8020299 A FR 8020299A FR 2490856 B1 FR2490856 B1 FR 2490856B1
Authority
FR
France
Prior art keywords
real
background noise
spectral analysis
analysis type
reducing background
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.)
Expired
Application number
FR8020299A
Other languages
French (fr)
Other versions
FR2490856A1 (en
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.)
ELISON SARL
Original Assignee
ELISON SARL
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 ELISON SARL filed Critical ELISON SARL
Priority to FR8020299A priority Critical patent/FR2490856B1/en
Publication of FR2490856A1 publication Critical patent/FR2490856A1/en
Application granted granted Critical
Publication of FR2490856B1 publication Critical patent/FR2490856B1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G9/00—Combinations of two or more types of control, e.g. gain control and tone control
    • H03G9/02—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • 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
    • H03G3/341—Muting when no signals or only weak signals are present
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G5/00—Tone control or bandwidth control in amplifiers
    • H03G5/16—Automatic control
    • H03G5/18—Automatic control in untuned amplifiers
FR8020299A 1980-09-22 1980-09-22 APPARATUS FOR REDUCING BACKGROUND NOISE OF THE REAL-TIME SPECTRAL ANALYSIS TYPE Expired FR2490856B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8020299A FR2490856B1 (en) 1980-09-22 1980-09-22 APPARATUS FOR REDUCING BACKGROUND NOISE OF THE REAL-TIME SPECTRAL ANALYSIS TYPE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8020299A FR2490856B1 (en) 1980-09-22 1980-09-22 APPARATUS FOR REDUCING BACKGROUND NOISE OF THE REAL-TIME SPECTRAL ANALYSIS TYPE

Publications (2)

Publication Number Publication Date
FR2490856A1 FR2490856A1 (en) 1982-03-26
FR2490856B1 true FR2490856B1 (en) 1985-09-27

Family

ID=9246144

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8020299A Expired FR2490856B1 (en) 1980-09-22 1980-09-22 APPARATUS FOR REDUCING BACKGROUND NOISE OF THE REAL-TIME SPECTRAL ANALYSIS TYPE

Country Status (1)

Country Link
FR (1) FR2490856B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2599580B1 (en) * 1986-05-30 1988-09-23 Elison Sarl DEVICE FOR REDUCING BACKGROUND NOISE IN AN ELECTROACOUSTIC CHAIN.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1120541A (en) * 1965-08-11 1968-07-17 Dolby Ray Milton Improvements in noise reduction systems
US3803357A (en) * 1971-06-30 1974-04-09 J Sacks Noise filter
US4185168A (en) * 1976-05-04 1980-01-22 Causey G Donald Method and means for adaptively filtering near-stationary noise from an information bearing signal
US4135590A (en) * 1976-07-26 1979-01-23 Gaulder Clifford F Noise suppressor system

Also Published As

Publication number Publication date
FR2490856A1 (en) 1982-03-26

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Legal Events

Date Code Title Description
ST Notification of lapse