ES404145A1 - Un aparato para recepcion de una senal portadora modulada por una senal moduladora. - Google Patents

Un aparato para recepcion de una senal portadora modulada por una senal moduladora.

Info

Publication number
ES404145A1
ES404145A1 ES404145A ES404145A ES404145A1 ES 404145 A1 ES404145 A1 ES 404145A1 ES 404145 A ES404145 A ES 404145A ES 404145 A ES404145 A ES 404145A ES 404145 A1 ES404145 A1 ES 404145A1
Authority
ES
Spain
Prior art keywords
signal
input
output
pass
threshold value
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
ES404145A
Other languages
English (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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of ES404145A1 publication Critical patent/ES404145A1/es
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
    • H03G9/12—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers having semiconductor devices
    • H03G9/18—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers having semiconductor devices for tone control and volume expansion or compression
    • 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
    • H04B1/16—Circuits
    • H04B1/1646—Circuits adapted for the reception of stereophonic signals
    • H04B1/1661—Reduction of noise by manipulation of the baseband composite stereophonic signal or the decoded left and right channels
    • H04B1/1669—Reduction of noise by manipulation of the baseband composite stereophonic signal or the decoded left and right channels of the demodulated composite stereo signal
    • H04B1/1684—Reduction of noise by manipulation of the baseband composite stereophonic signal or the decoded left and right channels of the demodulated composite stereo signal of the decoded left or right stereo channel

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Noise Elimination (AREA)
  • Circuits Of Receivers In General (AREA)
  • Control Of Amplification And Gain Control (AREA)

Abstract

Un aparato para recepción de una señal portadora modulada por una señal moduladora, cuyo aparato comprende un dispositivo sintonizador que incluye al menos un amplificador y un detector para la señal portadora, y un amplificador de baja frecuencia para la amplificación de la señal moduladora detectada, caracterizado porque el amplificador de baja frecuencia incluye un circuito de reducción de ruido que atenúa las señales que tienen una frecuencia más alta que una frecuencia límite dada y una amplitud más pequeña que un valor de umbral dado, cuyo circuito de reducción de ruido está provisto de un paso de entrada que tiene una primera y una segunda salida y al cual está aplicada la señal a ser tratada, un paso sumador que tiene una primera y una segunda entrada y de cuya salida puede ser tomada la señal tratada , una primera vía de señal que forma la conexión entre la primera salida del paso de entrada y la primera entrada del paso sumador, una segunda vía de señal que forma la conexión entrela segunda salida del paso de entrada y la segunda entrada del paso sumador, un filtro de paso alto incluido en la primera vía de señal, un control automático de ganancia que está incluido en la primera vía de señal y cuya entrada está conectada a la salida del filtro de paso alto y cuya ganancia cambia cuando la señal ofrecida a su entrada es superior a dicho valor de umbral, y un dispositivo de control para ajusta de este valor de umbral, a cuyo dispositivo de control está aplicada una señal de control obtenida por rectificación de la señal portadora modulada.
ES404145A 1971-06-24 1972-06-22 Un aparato para recepcion de una senal portadora modulada por una senal moduladora. Expired ES404145A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7108692.A NL164435C (nl) 1971-06-24 1971-06-24 Ontvanginrichting.

Publications (1)

Publication Number Publication Date
ES404145A1 true ES404145A1 (es) 1975-12-16

Family

ID=19813472

Family Applications (1)

Application Number Title Priority Date Filing Date
ES404145A Expired ES404145A1 (es) 1971-06-24 1972-06-22 Un aparato para recepcion de una senal portadora modulada por una senal moduladora.

Country Status (11)

Country Link
US (1) US3803496A (es)
JP (1) JPS5318124B1 (es)
AT (1) AT318712B (es)
AU (1) AU471365B2 (es)
CA (1) CA966195A (es)
DE (1) DE2230755C3 (es)
ES (1) ES404145A1 (es)
FR (1) FR2143467B1 (es)
GB (1) GB1396585A (es)
IT (1) IT956760B (es)
NL (1) NL164435C (es)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5750097B2 (es) * 1973-06-06 1982-10-26
US4000369A (en) * 1974-12-05 1976-12-28 Rockwell International Corporation Analog signal channel equalization with signal-in-noise embodiment
US4155041A (en) * 1976-05-13 1979-05-15 Burns Richard C System for reducing noise transients
US4110784A (en) * 1976-08-30 1978-08-29 Rca Corporation Noise reduction apparatus
DE2833590C2 (de) * 1978-07-31 1984-09-06 Il'ja Semenovič Izakson Adaptives Filter
US4259742A (en) * 1978-11-06 1981-03-31 Burns Richard C Electronic switching system for reducing noise transients
US4416024A (en) * 1979-12-17 1983-11-15 Sanyo Electric Co., Inc. Distortion reducing circuit in FM receiver
US4321586A (en) * 1980-08-21 1982-03-23 Knogo Corporation Article theft detection
DE3303881C2 (de) * 1983-02-05 1986-02-13 Seifert, Hans, Prof. Dr.-Ing., 5880 Lüdenscheid Einrichtung zur Bremsenergie-Rückgewinnung für Fahrzeuge
CN114915304B (zh) * 2022-03-28 2023-08-11 海能达通信股份有限公司 接收机及其信号抗干扰电路、信号抗干扰方法
CN119766259A (zh) * 2025-03-05 2025-04-04 武汉船舶通信研究所(中国船舶集团有限公司第七二二研究所) 一种高灵敏大动态抗干扰低频接收装置

Also Published As

Publication number Publication date
US3803496A (en) 1974-04-09
JPS5318124B1 (es) 1978-06-13
AT318712B (de) 1974-11-11
NL164435C (nl) 1980-12-15
AU4362372A (en) 1974-01-03
DE2230755A1 (de) 1972-12-28
AU471365B2 (en) 1976-04-15
FR2143467B1 (es) 1973-07-13
DE2230755B2 (de) 1979-09-27
DE2230755C3 (de) 1980-06-04
IT956760B (it) 1973-10-10
FR2143467A1 (es) 1973-02-02
CA966195A (en) 1975-04-15
NL7108692A (es) 1972-12-28
GB1396585A (en) 1975-06-04
NL164435B (nl) 1980-07-15

Similar Documents

Publication Publication Date Title
GB1120541A (en) Improvements in noise reduction systems
ES404145A1 (es) Un aparato para recepcion de una senal portadora modulada por una senal moduladora.
US3358234A (en) Ssb system which overcomes problems of squelch, impulse interference and agc as commonly encountered
SE7901479L (sv) Bruselimineringskrets
US2527617A (en) Radio receiving system
GB1514556A (en) Signal processor for reducing interference between frequency-modulated signals
GB1197509A (en) Pulse Delta Modulation Transmission System and Transmitters and Receivers to be Used in Said System
US2253338A (en) Modulated-carrier signal receiver
US2404338A (en) Noise suppression circuits
US2518449A (en) Noise limiter
ES385066A1 (es) Una disposicion de circuito para la supresion de interfe- rencias en un receptor de senales electricas.
US3163717A (en) Signal-processing apparatus utilizing variable threshold limiting means for an fm/fmmultiplex signal
CA2058482C (en) Baseband signal processing circuit for a radio communication apparatus
US3146402A (en) Frequency-modulated subcarrier detector
SU542329A1 (ru) Устройство дл временной автоматической регулировки усилинени
US2471427A (en) Interference reducing amplitude modulation detector
GB1228795A (es)
SU466607A1 (ru) Устройство автоматической регулировки усилени
JPS5735425A (en) Squelch device
GB1230201A (es)
GB1104815A (en) Silencing devices for radio receivers
JPS54157017A (en) Fm signal receiving circuit
FR93357E (fr) Systeme de transmission de signaux.
US3518370A (en) Modulation error cancelling apparatus
ES374084A1 (es) Un control automatico de soplido para ser usado en recepto-res de frecuencia modulada.