IT1212744B - CIRCUIT FOR THE ATTENUATION OF INTERFERENCE IN A RADIO RECEIVER BY USING AN ADJUSTABLE BANDWIDTH LOW-PASS FILTER. - Google Patents

CIRCUIT FOR THE ATTENUATION OF INTERFERENCE IN A RADIO RECEIVER BY USING AN ADJUSTABLE BANDWIDTH LOW-PASS FILTER.

Info

Publication number
IT1212744B
IT1212744B IT8321173A IT2117383A IT1212744B IT 1212744 B IT1212744 B IT 1212744B IT 8321173 A IT8321173 A IT 8321173A IT 2117383 A IT2117383 A IT 2117383A IT 1212744 B IT1212744 B IT 1212744B
Authority
IT
Italy
Prior art keywords
attenuation
interference
circuit
pass filter
radio receiver
Prior art date
Application number
IT8321173A
Other languages
Italian (it)
Other versions
IT8321173A0 (en
Inventor
Ettore Mastrojeni
Original Assignee
Sogs Ates Componenti Elettroni
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 Sogs Ates Componenti Elettroni filed Critical Sogs Ates Componenti Elettroni
Priority to IT8321173A priority Critical patent/IT1212744B/en
Publication of IT8321173A0 publication Critical patent/IT8321173A0/en
Priority to GB08411875A priority patent/GB2140235A/en
Priority to DE19843418037 priority patent/DE3418037A1/en
Priority to NL8401564A priority patent/NL8401564A/en
Priority to FR8407763A priority patent/FR2546350A1/en
Application granted granted Critical
Publication of IT1212744B publication Critical patent/IT1212744B/en

Links

Classifications

    • 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
IT8321173A 1983-05-19 1983-05-19 CIRCUIT FOR THE ATTENUATION OF INTERFERENCE IN A RADIO RECEIVER BY USING AN ADJUSTABLE BANDWIDTH LOW-PASS FILTER. IT1212744B (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
IT8321173A IT1212744B (en) 1983-05-19 1983-05-19 CIRCUIT FOR THE ATTENUATION OF INTERFERENCE IN A RADIO RECEIVER BY USING AN ADJUSTABLE BANDWIDTH LOW-PASS FILTER.
GB08411875A GB2140235A (en) 1983-05-19 1984-05-10 Circuits for reducing noise in electromagnetic wave receivers
DE19843418037 DE3418037A1 (en) 1983-05-19 1984-05-15 CIRCUIT FOR DAMPING INTERFERENCE IN A RADIO RECEIVER BY USING A LOW-PASS FILTER WITH ADJUSTABLE PASSAGE RANGE
NL8401564A NL8401564A (en) 1983-05-19 1984-05-15 SWITCH TO REDUCE NOISE IN A RADIO RECEIVER, BY USING A LOW-TRANSMISSION FILTER WITH AN ADJUSTABLE BAND.
FR8407763A FR2546350A1 (en) 1983-05-19 1984-05-18 CIRCUIT FOR MITIGATION OF DISTURBANCES IN A RADIO RECEIVER THANKS TO THE USE OF A LOW-PASS FILTER WITH ADJUSTABLE BANDWIDTH

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT8321173A IT1212744B (en) 1983-05-19 1983-05-19 CIRCUIT FOR THE ATTENUATION OF INTERFERENCE IN A RADIO RECEIVER BY USING AN ADJUSTABLE BANDWIDTH LOW-PASS FILTER.

Publications (2)

Publication Number Publication Date
IT8321173A0 IT8321173A0 (en) 1983-05-19
IT1212744B true IT1212744B (en) 1989-11-30

Family

ID=11177861

Family Applications (1)

Application Number Title Priority Date Filing Date
IT8321173A IT1212744B (en) 1983-05-19 1983-05-19 CIRCUIT FOR THE ATTENUATION OF INTERFERENCE IN A RADIO RECEIVER BY USING AN ADJUSTABLE BANDWIDTH LOW-PASS FILTER.

Country Status (5)

Country Link
DE (1) DE3418037A1 (en)
FR (1) FR2546350A1 (en)
GB (1) GB2140235A (en)
IT (1) IT1212744B (en)
NL (1) NL8401564A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4591805A (en) * 1984-05-30 1986-05-27 General Electric Company Adaptive bandwidth amplifier
DE4192545T (en) * 1990-10-10 1992-10-08
JPH06164659A (en) * 1992-11-27 1994-06-10 Nec Corp Detection circuit
WO1996017440A1 (en) * 1994-11-29 1996-06-06 Gallagher Group Limited Method of electronic control
FI99068C (en) * 1995-01-27 1997-09-25 Nokia Mobile Phones Ltd Procedure for improving speaker function in mobile phone and mobile phone
GB2356305B (en) * 1996-07-11 2001-07-25 Nec Corp Portable telephone capable of decreasing noise

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB428772A (en) * 1932-10-19 1935-05-20 Marconi Wireless Telegraph Co Improvements in or relating to frequency discriminating circuit arrangements suitable for use in radio receivers
US3798559A (en) * 1971-04-20 1974-03-19 Matsushita Electric Ind Co Ltd Noise reduction system
DE2452360A1 (en) * 1974-11-05 1976-05-06 Blaupunkt Werke Gmbh Receiver noise suppressor circuit dependent on field strength - with operating voltage derived from HF carrier, controls low-pass admittance curve
JPS539403A (en) * 1976-07-14 1978-01-27 Pioneer Electronic Corp Fm stereophonic receiver
JPS54122017A (en) * 1978-03-16 1979-09-21 Clarion Co Ltd Noise reducing circuit
US4221930A (en) * 1979-04-11 1980-09-09 Rca Corporation FM Defect compensation apparatus
JPS58151724A (en) * 1982-03-05 1983-09-09 Nec Corp Receiver

Also Published As

Publication number Publication date
NL8401564A (en) 1984-12-17
FR2546350A1 (en) 1984-11-23
DE3418037A1 (en) 1984-11-22
GB8411875D0 (en) 1984-06-13
IT8321173A0 (en) 1983-05-19
GB2140235A (en) 1984-11-21

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