JPS55143844A - Noise blanking circuit following mean noise level - Google Patents

Noise blanking circuit following mean noise level

Info

Publication number
JPS55143844A
JPS55143844A JP5408680A JP5408680A JPS55143844A JP S55143844 A JPS55143844 A JP S55143844A JP 5408680 A JP5408680 A JP 5408680A JP 5408680 A JP5408680 A JP 5408680A JP S55143844 A JPS55143844 A JP S55143844A
Authority
JP
Japan
Prior art keywords
noise
blanking circuit
circuit following
following mean
noise level
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
JP5408680A
Other languages
English (en)
Inventor
Waresu Doresuraa Rojiyaa
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.)
Motorola Solutions Inc
Original Assignee
Motorola 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 Motorola Inc filed Critical Motorola Inc
Publication of JPS55143844A publication Critical patent/JPS55143844A/ja
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • 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
    • H03G3/345—Muting during a short period of time when noise pulses are detected, i.e. blanking
JP5408680A 1979-04-23 1980-04-22 Noise blanking circuit following mean noise level Pending JPS55143844A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US3262579A 1979-04-23 1979-04-23

Publications (1)

Publication Number Publication Date
JPS55143844A true JPS55143844A (en) 1980-11-10

Family

ID=21865935

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5408680A Pending JPS55143844A (en) 1979-04-23 1980-04-22 Noise blanking circuit following mean noise level

Country Status (7)

Country Link
US (1) US4327446A (ja)
EP (1) EP0018716A3 (ja)
JP (1) JPS55143844A (ja)
KR (1) KR830002234B1 (ja)
BR (1) BR8002141A (ja)
CA (1) CA1176336A (ja)
MX (1) MX148402A (ja)

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3130341A1 (de) * 1980-09-17 1982-06-16 Hitachi, Ltd., Tokyo Rauschsperre und mit dieser versehener fm-funkempfaenger
US4450573A (en) * 1981-12-07 1984-05-22 Motorola Inc. Bit data operated squelch
US4521917A (en) * 1983-11-14 1985-06-04 General Electric Company Noise blanking circuit and method
US4617474A (en) * 1984-06-27 1986-10-14 Jason Barry L Signal detector
US4675863A (en) 1985-03-20 1987-06-23 International Mobile Machines Corp. Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels
EP0208425A3 (en) * 1985-06-13 1988-01-13 Devon County Council Television sub-carrier transmission
US4637066A (en) * 1985-07-02 1987-01-13 General Motors Corporation Noise blanking signal generator for AM radio
US4843626A (en) * 1986-07-10 1989-06-27 Werrbach Donn R Multiband limiter with automatic limiting threshold (ALT) compensation
US4825448A (en) * 1986-08-07 1989-04-25 International Mobile Machines Corporation Subscriber unit for wireless digital telephone system
FR2623672A1 (fr) * 1987-11-19 1989-05-26 Alcatel Thomson Radiotelephone Dispositif d'amelioration du confort d'ecoute par suppression des phenomenes transitoires dans une chaine de reception d'un equipement fm/pm a bande etroite, notamment en radiotelephonie
US5170489A (en) * 1988-11-30 1992-12-08 Ellis Glazebrook Noise blanker with continuous wave interference compensation
US4965854A (en) * 1988-11-30 1990-10-23 General Electric Company Noise blanker with continuous wave interference compensation
EP0597525A1 (en) * 1992-11-09 1994-05-18 Koninklijke Philips Electronics N.V. Device for detecting pulsatory interference signals
US5389912A (en) * 1993-02-10 1995-02-14 Arvin; Parham P. Truck clearance anti-collision device
US5546383A (en) 1993-09-30 1996-08-13 Cooley; David M. Modularly clustered radiotelephone system
DE69835529T2 (de) * 1997-11-03 2007-01-18 Harris Corp., Melbourne Rekonfigurierbarer funksystemaufbau
US6577851B1 (en) * 1999-11-16 2003-06-10 Motorola, Inc. Impulse noise blanker
US8583427B2 (en) * 1999-11-18 2013-11-12 Broadcom Corporation Voice and data exchange over a packet based network with voice detection
US6775526B2 (en) * 2000-12-01 2004-08-10 Microchip Technology Incorporated Modulated input signal filter
EP1271771B1 (en) * 2001-06-28 2006-08-09 STMicroelectronics GmbH Method and apparatus for removing noise spikes
US20080204379A1 (en) * 2007-02-22 2008-08-28 Microsoft Corporation Display with integrated audio transducer device
US7805120B2 (en) * 2007-04-17 2010-09-28 Delphi Technologies, Inc. Noise blanker circuit and method for removing noise and correcting a signal
EP3182164B1 (en) * 2015-12-15 2018-07-04 Airbus Defence and Space GmbH Noise distribution shaping for signals, particularly cdma signals, with mitigation of artifact signals
US10085067B2 (en) 2016-01-12 2018-09-25 Ppc Broadband, Inc. Network interface device with dynamic noise conditioning
CA3012728A1 (en) 2016-01-29 2017-08-03 Ppc Broadband, Inc. Dynamic noise mitigation device
US10476608B2 (en) 2017-07-27 2019-11-12 Ppc Broadband, Inc. Network interface devices with upstream noise suppressors

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3098872A (en) * 1958-03-06 1963-07-23 Deere & Co Production of nitrourea
US3098972A (en) * 1961-10-10 1963-07-23 Howard James Wesley Transistorized pulse gate noise limiter
US3191124A (en) * 1961-10-30 1965-06-22 Avco Corp Amplitude noise control gate
US3188571A (en) * 1962-11-28 1965-06-08 Collins Radio Co Detected noise actuated, agc noisequieting action dependent, and total noise level adaptive rf receiver squelch system
NL145420B (nl) * 1969-10-25 1975-03-17 Philips Nv Schakeling voor het onderdrukken van storingen in een fm radio-ontvanger.
US3588705A (en) * 1969-11-12 1971-06-28 Nasa Frequency-modulation demodulator threshold extension device
US3623144A (en) * 1970-05-13 1971-11-23 Motorola Inc Impulse noise-blanking system employing field effect transistors
US3699457A (en) * 1971-08-11 1972-10-17 Motorola Inc Noise blanker circuit including rate bias and rate shutoff circuitry and audio blanking
DE2512412C3 (de) * 1975-03-21 1979-02-01 Blaupunkt-Werke Gmbh, 3200 Hildesheim Schaltungsanordnung zum Unterdrücken von Störungen in einem FM-Rundfunkempfänger
DE2633000A1 (de) * 1976-07-22 1978-01-26 Blaupunkt Werke Gmbh Rundfunkempfaenger mit stoerimpulsaustastung
GB1578374A (en) * 1976-11-08 1980-11-05 Clarion Co Ltd Noise reduction in audio reproducing systems

Also Published As

Publication number Publication date
EP0018716A3 (en) 1981-02-11
KR830002234B1 (ko) 1983-10-20
EP0018716A2 (en) 1980-11-12
CA1176336A (en) 1984-10-16
BR8002141A (pt) 1980-11-25
US4327446A (en) 1982-04-27
MX148402A (es) 1983-04-18
KR830003994A (ko) 1983-06-30

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