FR1275212A - Montage récepteur pour signaux d'appel de fréquence prédéterminée - Google Patents

Montage récepteur pour signaux d'appel de fréquence prédéterminée

Info

Publication number
FR1275212A
FR1275212A FR845186A FR845186A FR1275212A FR 1275212 A FR1275212 A FR 1275212A FR 845186 A FR845186 A FR 845186A FR 845186 A FR845186 A FR 845186A FR 1275212 A FR1275212 A FR 1275212A
Authority
FR
France
Prior art keywords
predetermined frequency
receiver assembly
call signals
frequency call
signals
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
FR845186A
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.)
Hasler AG
Original Assignee
Hasler AG
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
Priority to NL258644D priority Critical patent/NL258644A/xx
Priority to CH8134559A priority patent/CH376810A/de
Application filed by Hasler AG filed Critical Hasler AG
Priority to FR845186A priority patent/FR1275212A/fr
Application granted granted Critical
Publication of FR1275212A publication Critical patent/FR1275212A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/022—Selective call receivers
    • H04W88/025—Selective call decoders
    • H04W88/027—Selective call decoders using frequency address codes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
    • H01H47/20—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay for producing frequency-selective operation of the relay
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G11/00—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general
    • H03G11/002—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general without controlling loop
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G11/00—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general
    • H03G11/02—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general by means of diodes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • 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
    • H03G3/341—Muting when no signals or only weak signals are present
    • 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
    • H04B1/1638—Special circuits to enhance selectivity of receivers not otherwise provided for

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
FR845186A 1959-12-02 1960-11-28 Montage récepteur pour signaux d'appel de fréquence prédéterminée Expired FR1275212A (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
NL258644D NL258644A (fr) 1959-12-02
CH8134559A CH376810A (de) 1959-12-02 1959-12-02 Selektive Empfangsschaltung für Rufsignale von vorbestimmter Frequenz
FR845186A FR1275212A (fr) 1959-12-02 1960-11-28 Montage récepteur pour signaux d'appel de fréquence prédéterminée

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH8134559A CH376810A (de) 1959-12-02 1959-12-02 Selektive Empfangsschaltung für Rufsignale von vorbestimmter Frequenz
FR845186A FR1275212A (fr) 1959-12-02 1960-11-28 Montage récepteur pour signaux d'appel de fréquence prédéterminée

Publications (1)

Publication Number Publication Date
FR1275212A true FR1275212A (fr) 1961-11-03

Family

ID=25738545

Family Applications (1)

Application Number Title Priority Date Filing Date
FR845186A Expired FR1275212A (fr) 1959-12-02 1960-11-28 Montage récepteur pour signaux d'appel de fréquence prédéterminée

Country Status (3)

Country Link
CH (1) CH376810A (fr)
FR (1) FR1275212A (fr)
NL (1) NL258644A (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3714583A (en) * 1970-08-26 1973-01-30 Rca Corp Muting circuit

Also Published As

Publication number Publication date
CH376810A (de) 1964-04-15
NL258644A (fr)

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