JPS56104547A - Noise eliminating circuit - Google Patents

Noise eliminating circuit

Info

Publication number
JPS56104547A
JPS56104547A JP792280A JP792280A JPS56104547A JP S56104547 A JPS56104547 A JP S56104547A JP 792280 A JP792280 A JP 792280A JP 792280 A JP792280 A JP 792280A JP S56104547 A JPS56104547 A JP S56104547A
Authority
JP
Japan
Prior art keywords
components
frequency
point
low
input power
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
JP792280A
Other languages
Japanese (ja)
Other versions
JPS6257132B2 (en
Inventor
Yoichiro Mitani
Ryuichi Kato
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.)
NTN Corp
Original Assignee
NTN Toyo Bearing 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 NTN Toyo Bearing Co Ltd filed Critical NTN Toyo Bearing Co Ltd
Priority to JP792280A priority Critical patent/JPS56104547A/en
Publication of JPS56104547A publication Critical patent/JPS56104547A/en
Publication of JPS6257132B2 publication Critical patent/JPS6257132B2/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

Landscapes

  • Noise Elimination (AREA)

Abstract

PURPOSE:To subtract and eliminate low-frequency periodical noise components by the subtracting circuit and eliminate next high-frequency aperiodic noise components by the low-pass filter circuit, after extracting only low-frequency periodical noise components from the input signal. CONSTITUTION:Filter circuits 1 and 2 combined to become a band pass filter circuit and take out frequency power components indicated by f=1/2piRC and frequency components near them from input power at point (a). When frequency f1 of low-frequency periodical noise components DELTAP1 of input power is denoted as 10Hz, components DELTAP1 in input power are extracted selectively by operating variable resistor VR of the level adjusting circuit to select RC=0.016. By subtracting power, which appears at point (c), from input power inputted to point (a) by subtractor 4, the output of the subtractor which appears at point (d) has components DELTAP1 eliminated, and only components DELTAP2 are superposed.
JP792280A 1980-01-25 1980-01-25 Noise eliminating circuit Granted JPS56104547A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP792280A JPS56104547A (en) 1980-01-25 1980-01-25 Noise eliminating circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP792280A JPS56104547A (en) 1980-01-25 1980-01-25 Noise eliminating circuit

Publications (2)

Publication Number Publication Date
JPS56104547A true JPS56104547A (en) 1981-08-20
JPS6257132B2 JPS6257132B2 (en) 1987-11-30

Family

ID=11679012

Family Applications (1)

Application Number Title Priority Date Filing Date
JP792280A Granted JPS56104547A (en) 1980-01-25 1980-01-25 Noise eliminating circuit

Country Status (1)

Country Link
JP (1) JPS56104547A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62284536A (en) * 1986-03-11 1987-12-10 ドイチエ・トムソン−ブラント・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング Digital compensator for specific obstacle signal

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01178022A (en) * 1988-01-07 1989-07-14 Toyota Autom Loom Works Ltd Fuel display device of lpg bottle for industrial use vehicle

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5153817U (en) * 1974-10-23 1976-04-24
JPS51134322U (en) * 1975-04-19 1976-10-29
JPS5361202A (en) * 1976-11-13 1978-06-01 Clarion Co Ltd Noise limiting system
JPS53121496A (en) * 1977-03-31 1978-10-23 Nittetsu Mining Co Ltd Circuit for deleting low frequency beat

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5153817U (en) * 1974-10-23 1976-04-24
JPS51134322U (en) * 1975-04-19 1976-10-29
JPS5361202A (en) * 1976-11-13 1978-06-01 Clarion Co Ltd Noise limiting system
JPS53121496A (en) * 1977-03-31 1978-10-23 Nittetsu Mining Co Ltd Circuit for deleting low frequency beat

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62284536A (en) * 1986-03-11 1987-12-10 ドイチエ・トムソン−ブラント・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング Digital compensator for specific obstacle signal
JPH0519336B2 (en) * 1986-03-11 1993-03-16 Thomson Brandt Gmbh

Also Published As

Publication number Publication date
JPS6257132B2 (en) 1987-11-30

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