FR1275212A - Montage récepteur pour signaux d'appel de fréquence prédéterminée - Google Patents
Montage récepteur pour signaux d'appel de fréquence prédéterminéeInfo
- 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
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)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3714583A (en) * | 1970-08-26 | 1973-01-30 | Rca Corp | Muting circuit |
-
0
- NL NL258644D patent/NL258644A/xx unknown
-
1959
- 1959-12-02 CH CH8134559A patent/CH376810A/de unknown
-
1960
- 1960-11-28 FR FR845186A patent/FR1275212A/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
CH376810A (de) | 1964-04-15 |
NL258644A (fr) |
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