IT8148041A0 - Perfezionamento nei ricevitori per segnali stereofonici a modulazionedi ampiezza - Google Patents

Perfezionamento nei ricevitori per segnali stereofonici a modulazionedi ampiezza

Info

Publication number
IT8148041A0
IT8148041A0 IT8148041A IT4804181A IT8148041A0 IT 8148041 A0 IT8148041 A0 IT 8148041A0 IT 8148041 A IT8148041 A IT 8148041A IT 4804181 A IT4804181 A IT 4804181A IT 8148041 A0 IT8148041 A0 IT 8148041A0
Authority
IT
Italy
Prior art keywords
stereophone
receivers
improvement
signals
amplitude modulation
Prior art date
Application number
IT8148041A
Other languages
English (en)
Other versions
IT1142352B (it
Inventor
Francis H Hilbert
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 IT8148041A0 publication Critical patent/IT8148041A0/it
Application granted granted Critical
Publication of IT1142352B publication Critical patent/IT1142352B/it

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/44—Arrangements characterised by circuits or components specially adapted for broadcast
    • H04H20/46—Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95
    • H04H20/47—Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95 specially adapted for stereophonic broadcast systems
    • H04H20/49—Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95 specially adapted for stereophonic broadcast systems for AM stereophonic broadcast systems
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
    • H10F30/00—Individual radiation-sensitive semiconductor devices in which radiation controls the flow of current through the devices, e.g. photodetectors
    • H10F30/20—Individual radiation-sensitive semiconductor devices in which radiation controls the flow of current through the devices, e.g. photodetectors the devices having potential barriers, e.g. phototransistors
    • H10F30/21—Individual radiation-sensitive semiconductor devices in which radiation controls the flow of current through the devices, e.g. photodetectors the devices having potential barriers, e.g. phototransistors the devices being sensitive to infrared, visible or ultraviolet radiation
    • H10F30/28—Individual radiation-sensitive semiconductor devices in which radiation controls the flow of current through the devices, e.g. photodetectors the devices having potential barriers, e.g. phototransistors the devices being sensitive to infrared, visible or ultraviolet radiation the devices being characterised by field-effect operation, e.g. junction field-effect phototransistors
    • H10F30/283—Individual radiation-sensitive semiconductor devices in which radiation controls the flow of current through the devices, e.g. photodetectors the devices having potential barriers, e.g. phototransistors the devices being sensitive to infrared, visible or ultraviolet radiation the devices being characterised by field-effect operation, e.g. junction field-effect phototransistors the devices having Schottky gates
    • H10F30/2843—Schottky gate FETs, e.g. photo MESFETs

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Stereo-Broadcasting Methods (AREA)
  • Circuits Of Receivers In General (AREA)
IT48041/81A 1980-03-24 1981-03-17 Perfezionamento nei ricevitori per segnali stereofonici a modulazione di ampiezza IT1142352B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/133,189 US4371747A (en) 1980-03-24 1980-03-24 AM Stereophonic decoder

Publications (2)

Publication Number Publication Date
IT8148041A0 true IT8148041A0 (it) 1981-03-17
IT1142352B IT1142352B (it) 1986-10-08

Family

ID=22457414

Family Applications (1)

Application Number Title Priority Date Filing Date
IT48041/81A IT1142352B (it) 1980-03-24 1981-03-17 Perfezionamento nei ricevitori per segnali stereofonici a modulazione di ampiezza

Country Status (16)

Country Link
US (1) US4371747A (it)
EP (1) EP0048729B1 (it)
JP (1) JPS5915424B2 (it)
KR (1) KR860000311B1 (it)
AR (1) AR226585A1 (it)
BR (1) BR8107943A (it)
CA (1) CA1152159A (it)
DE (1) DE3165602D1 (it)
ES (1) ES500620A0 (it)
IL (1) IL61998A (it)
IT (1) IT1142352B (it)
MX (1) MX149526A (it)
PT (1) PT72652B (it)
SG (1) SG67687G (it)
WO (1) WO1981002822A1 (it)
ZA (1) ZA81854B (it)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4499426A (en) * 1980-07-02 1985-02-12 Motorola, Inc. Baseband discriminator for frequency or transform modulation
US4490837A (en) * 1982-08-30 1984-12-25 Motorola, Inc. AM Stereo to FM stereo converter
US4618981A (en) * 1985-02-28 1986-10-21 Motorola, Inc. Tone detector with pseudo phase locked loop
US4631745A (en) * 1985-04-26 1986-12-23 Motorola, Inc. Analog divider with minimal phase distortion
US4679237A (en) * 1985-08-02 1987-07-07 Motorola, Inc. Correction control circuit for AM stereophonic receivers
US4757539A (en) * 1985-12-19 1988-07-12 Sanyo Electric Co., Ltd. Apparatus and method for decoding an AM stereo broadcasting signal of an independent sideband system
US4688254A (en) * 1986-04-01 1987-08-18 Motorola, Inc. Controlled blend for AM stereo receivers
US4680794A (en) * 1986-07-29 1987-07-14 Motorola, Inc. AM stereo system with modified spectrum
US5014316A (en) * 1990-03-21 1991-05-07 Delco Electronics Corporation Compatible quadrature amplitude modulation detector system
US5222144A (en) * 1991-10-28 1993-06-22 Ford Motor Company Digital quadrature radio receiver with two-step processing
JP3586006B2 (ja) * 1995-09-08 2004-11-10 東芝デジタルメディアエンジニアリング株式会社 Ａｍステレオデコーダ回路

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3231672A (en) * 1958-10-20 1966-01-25 Philco Corp Transmission system for stereophonic signals
US3043914A (en) * 1958-10-20 1962-07-10 Philco Corp Single channel stereophonic system
US3007005A (en) * 1959-02-12 1961-10-31 Philco Corp Transmitter for stereophonic information signals
DE1252283B (it) * 1959-03-16
US3089096A (en) * 1959-04-09 1963-05-07 Philco Corp Stereophonic detector and matrixing circuit
US3068475A (en) * 1959-10-07 1962-12-11 Rca Corp Stereophonic sound signalling system
US3080453A (en) * 1959-11-13 1963-03-05 Rca Corp Stereophonic sound receiver system
US3067293A (en) * 1959-11-19 1962-12-04 Philco Corp Single channel stereophonic broad-casting system
US3218393A (en) * 1960-02-11 1965-11-16 Leonard R Kahn Compatible stereophonic transmission and reception systems, and methods and components characterizing same
US3068419A (en) * 1960-09-23 1962-12-11 Philco Corp Amplitude limiter bridge with conjugate signal input and limited output
NL6608507A (it) * 1966-06-18 1967-12-19
US3908090A (en) * 1972-05-10 1975-09-23 Leonard R Kahn Compatible AM stereophonic transmission system
US3823268A (en) * 1972-06-07 1974-07-09 Mc Intosh Labor Inc Dynamic stereo separation control
US4018994A (en) * 1974-07-10 1977-04-19 Kahn Leonard R Compatible AM stereophonic receivers
US4037057A (en) * 1974-08-01 1977-07-19 Nippon Gakki Seizo Kabushiki Kaisha Noise-cancelling apparatus for FM stereo receiver
US4079204A (en) * 1975-12-26 1978-03-14 Sansui Electric Co., Ltd. AM Stereophonic transmission system
US4218586A (en) * 1976-04-07 1980-08-19 Motorola, Inc. Compatible AM stereo broadcast system
IL51777A (en) * 1976-04-07 1978-12-17 Motorola Inc Am stereo broadcast system
US4172966A (en) * 1978-02-23 1979-10-30 Motorola, Inc. AM stereophonic receiver

Also Published As

Publication number Publication date
EP0048729A4 (en) 1982-08-05
KR830005779A (ko) 1983-09-09
EP0048729A1 (en) 1982-04-07
DE3165602D1 (de) 1984-09-27
IL61998A0 (en) 1981-02-27
PT72652A (en) 1981-04-01
CA1152159A (en) 1983-08-16
IL61998A (en) 1984-02-29
JPS57500360A (it) 1982-02-25
AR226585A1 (es) 1982-07-30
ES8203179A1 (es) 1982-03-01
PT72652B (en) 1982-06-01
ES500620A0 (es) 1982-03-01
EP0048729B1 (en) 1984-08-22
IT1142352B (it) 1986-10-08
MX149526A (es) 1983-11-18
BR8107943A (pt) 1982-03-09
US4371747A (en) 1983-02-01
KR860000311B1 (ko) 1986-03-31
SG67687G (en) 1988-02-19
JPS5915424B2 (ja) 1984-04-09
ZA81854B (en) 1982-03-31
WO1981002822A1 (en) 1981-10-01

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Legal Events

Date Code Title Description
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19990331