FR2478901B1 - Etage de selection du signal alternatif de plus grande amplitude parmi deux signaux de frequences differentes - Google Patents

Etage de selection du signal alternatif de plus grande amplitude parmi deux signaux de frequences differentes

Info

Publication number
FR2478901B1
FR2478901B1 FR8005981A FR8005981A FR2478901B1 FR 2478901 B1 FR2478901 B1 FR 2478901B1 FR 8005981 A FR8005981 A FR 8005981A FR 8005981 A FR8005981 A FR 8005981A FR 2478901 B1 FR2478901 B1 FR 2478901B1
Authority
FR
Grant status
Grant
Patent type
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
FR8005981A
Other languages
English (en)
Other versions
FR2478901A1 (fr )
Inventor
Jean Salmon
Daniel Laurent
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.)
Jeumont-Schneider
Original Assignee
Jeumont-Schneider
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
Grant date

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
    • G01R23/005Circuits for comparing several input signals and for indicating the result of this comparison, e.g. equal, different, greater, smaller (comparing phase or frequency of 2 mutually independent oscillations in demodulators)
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B61RAILWAYS
    • B61LGUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L3/00Devices along the route for controlling devices on the vehicle or vehicle train, e.g. to release brake, to operate a warning signal
    • B61L3/16Continuous control along the route
    • B61L3/22Continuous control along the route using magnetic or electrostatic induction; using electromagnetic radiation
    • B61L3/24Continuous control along the route using magnetic or electrostatic induction; using electromagnetic radiation employing different frequencies or coded pulse groups, e.g. in combination with track circuits
    • B61L3/243Continuous control along the route using magnetic or electrostatic induction; using electromagnetic radiation employing different frequencies or coded pulse groups, e.g. in combination with track circuits using alternating current
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/10Frequency-modulated carrier systems, i.e. using frequency-shift keying
    • H04L27/14Demodulator circuits; Receiver circuits
    • H04L27/156Demodulator circuits; Receiver circuits with demodulation using temporal properties of the received signal, e.g. detecting pulse width
    • H04L27/1563Demodulator circuits; Receiver circuits with demodulation using temporal properties of the received signal, e.g. detecting pulse width using transition or level detection
FR8005981A 1980-03-18 1980-03-18 Etage de selection du signal alternatif de plus grande amplitude parmi deux signaux de frequences differentes Expired FR2478901B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8005981A FR2478901B1 (fr) 1980-03-18 1980-03-18 Etage de selection du signal alternatif de plus grande amplitude parmi deux signaux de frequences differentes

Applications Claiming Priority (9)

Application Number Priority Date Filing Date Title
FR8005981A FR2478901B1 (fr) 1980-03-18 1980-03-18 Etage de selection du signal alternatif de plus grande amplitude parmi deux signaux de frequences differentes
BE204096A BE887913A (fr) 1980-03-18 1981-03-12 Etage de selection du signal alternatif de plus grande amplitude parmi deux signaux frequences differentes
DE19813140626 DE3140626A1 (de) 1980-03-18 1981-03-17 Selection stage of the ac signal having the greater amplitude
GB8134237A GB2083980B (en) 1980-03-18 1981-03-17 Selection stage of the ac signal having the greater amplitude
NL8120059A NL8120059A (en) 1980-03-18 1981-03-17 Circuit selecting highest amplitude of two AC signals - uses open loop operational amplifier, to which are applied summed AC signals, with zero crossing counter and weak signal filter
US06324398 US4488238A (en) 1980-03-18 1981-03-17 Selection stage of the AC signal of greater amplitude between two signals of different frequencies
CA 373212 CA1166707A (fr) 1980-03-18 1981-03-17 Etage de selection du signal alternatif de plus grande amplitude parmi deux signaux de frequences differentes
DE19813140626 DE3140626C1 (de) 1980-03-18 1981-03-17 Schaltungsanordnung zur Selektion eines elektrischen Wechselsignals
PCT/FR1981/000039 WO1981002714A1 (fr) 1980-03-18 1981-03-17 Etage de selection du signal alternatif de plus grande amplitude parmi deux signaux de frequences differentes

Publications (2)

Publication Number Publication Date
FR2478901A1 true FR2478901A1 (fr) 1981-09-25
FR2478901B1 true FR2478901B1 (fr) 1986-02-07

Family

ID=9239775

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8005981A Expired FR2478901B1 (fr) 1980-03-18 1980-03-18 Etage de selection du signal alternatif de plus grande amplitude parmi deux signaux de frequences differentes

Country Status (7)

Country Link
US (1) US4488238A (fr)
BE (1) BE887913A (fr)
CA (1) CA1166707A (fr)
DE (1) DE3140626C1 (fr)
FR (1) FR2478901B1 (fr)
GB (1) GB2083980B (fr)
WO (1) WO1981002714A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4625279A (en) * 1984-05-11 1986-11-25 Westinghouse Electric Corp. Vehicle speed control apparatus and method
FR2736225B1 (fr) * 1995-06-27 1997-08-01 Gec Alsthom Transport Sa Dispositif permettant de s'affranchir des problemes de diaphonie lors de la localisation d'un vehicule se deplacant le long de moyens de propagation d'ondes electromagnetiques
US7027897B2 (en) * 2004-01-27 2006-04-11 Bombardier Transportation Gmbh Apparatus and method for suppressing mechanical resonance in a mass transit vehicle

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL298515A (fr) * 1962-10-01
GB1151614A (en) * 1967-02-22 1969-05-14 Gen Electric & English Elect Improvements in or relating to Electric Signal Receivers
GB1164386A (en) * 1967-05-26 1969-09-17 Standard Telephones Cables Ltd Frequency Separation.
FR2076219A5 (fr) * 1970-01-07 1971-10-15 Signaux Entr Electriques
BE799885R (fr) * 1972-05-26 1973-09-17 Thomson Csf Perfectionnements aux dispositifs d'intercommunication a rayonnement limite,
US3760278A (en) * 1970-12-23 1973-09-18 Thomson Csf Limited range radiocommunication system
FR2176266A5 (fr) * 1972-03-17 1973-10-26 Jeumont Schneider
FR2313812B2 (fr) * 1972-03-17 1977-12-09 Jeumont Schneider
US3973746A (en) * 1975-05-02 1976-08-10 Walt Disney Productions Collision avoidance system

Also Published As

Publication number Publication date Type
WO1981002714A1 (fr) 1981-10-01 application
DE3140626C1 (de) 1984-03-08 grant
CA1166707A1 (fr) grant
GB2083980B (en) 1984-06-06 grant
FR2478901A1 (fr) 1981-09-25 application
BE887913A1 (fr) grant
BE887913A (fr) 1981-07-01 grant
US4488238A (en) 1984-12-11 grant
GB2083980A (en) 1982-03-31 application
CA1166707A (fr) 1984-05-01 grant

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Legal Events

Date Code Title Description
ST Notification of lapse