ES424740A1 - Un sistema de comunicacion por radio. - Google Patents
Un sistema de comunicacion por radio.Info
- Publication number
- ES424740A1 ES424740A1 ES424740A ES424740A ES424740A1 ES 424740 A1 ES424740 A1 ES 424740A1 ES 424740 A ES424740 A ES 424740A ES 424740 A ES424740 A ES 424740A ES 424740 A1 ES424740 A1 ES 424740A1
- Authority
- ES
- Spain
- Prior art keywords
- signals
- telephone network
- receiving device
- radio signals
- fixed station
- 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
- 230000008878 coupling Effects 0.000 abstract 5
- 238000010168 coupling process Methods 0.000 abstract 5
- 238000005859 coupling reaction Methods 0.000 abstract 5
- 230000030279 gene silencing Effects 0.000 abstract 3
- 230000001755 vocal effect Effects 0.000 abstract 2
Classifications
-
- 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
- H03G3/344—Muting responsive to the amount of noise (noise squelch)
-
- 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
- H04B1/1607—Supply circuits
- H04B1/1615—Switching on; Switching off, e.g. remotely
-
- 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
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/44—Transmit/receive switching
- H04B1/46—Transmit/receive switching by voice-frequency signals; by pilot signals
-
- 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
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/50—Circuits using different frequencies for the two directions of communication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/725—Cordless telephones
- H04M1/73—Battery saving arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0251—Power saving arrangements in terminal devices using monitoring of local events, e.g. events related to user activity
- H04W52/0254—Power saving arrangements in terminal devices using monitoring of local events, e.g. events related to user activity detecting a user operation or a tactile contact or a motion of the device
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Transceivers (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US34620373A | 1973-03-29 | 1973-03-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
ES424740A1 true ES424740A1 (es) | 1976-11-01 |
Family
ID=23358388
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES424740A Expired ES424740A1 (es) | 1973-03-29 | 1974-03-28 | Un sistema de comunicacion por radio. |
Country Status (10)
Country | Link |
---|---|
JP (1) | JPS49130601A (es) |
AU (1) | AU468463B2 (es) |
BR (1) | BR7402074D0 (es) |
CA (1) | CA1018254A (es) |
DE (1) | DE2415332C2 (es) |
ES (1) | ES424740A1 (es) |
FR (1) | FR2223915B1 (es) |
GB (1) | GB1412386A (es) |
IL (1) | IL44474A (es) |
ZA (1) | ZA741786B (es) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL7806618A (nl) * | 1978-06-20 | 1979-12-27 | Philips Nv | Satellietcommunicatiestelsel voor spraak en telegrafie. |
EP0011063B1 (en) * | 1978-11-11 | 1983-07-20 | International Mobile Machines Corporation | Portable radiotelephone system |
IT1202809B (it) * | 1978-12-22 | 1989-02-09 | Sits Soc It Telecom Siemens | Traslatore di linea per sistemi radiotelefonici |
GB2121649A (en) * | 1982-05-04 | 1983-12-21 | Edward Desmond Bishop | Cordless transmission in audio reproduction system |
DE3219953C2 (de) * | 1982-05-27 | 1984-09-27 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Überleitanordnung für die Überleitung von Gesprächen von einer Zweidrahtleitung auf ein Wechselsprechfunkgerät |
WO1985000256A1 (en) * | 1983-06-27 | 1985-01-17 | The Commonwealth Of Australia | Squelch circuit |
GB2155279A (en) * | 1984-03-03 | 1985-09-18 | Standard Telephones Cables Ltd | Cordless telephone |
FR2577367B1 (fr) * | 1985-02-13 | 1988-03-11 | Alsatel Radio Telecommunicatio | Dispositif de communication radiotelephonique |
DE3514462A1 (de) * | 1985-04-22 | 1986-10-23 | Sennheiser Electronic Kg, 3002 Wedemark | Verfahren zur drahtlosen uebertragung von nachrichten |
JPS6387845A (ja) * | 1986-09-30 | 1988-04-19 | Juki Corp | コ−ドレステレホン |
DE9115204U1 (de) * | 1991-12-07 | 1992-05-27 | RR Elektronische Geräte GmbH + Co KG, 2300 Kiel | Antennenfilter |
JP2586440B2 (ja) * | 1994-05-09 | 1997-02-26 | 日本電気株式会社 | 移動体通信システム |
JPH08186624A (ja) * | 1994-12-28 | 1996-07-16 | Nec Corp | コードレス電話システム |
US7742758B2 (en) | 2005-08-19 | 2010-06-22 | Callpod, Inc. | Mobile conferencing and audio sharing technology |
US7707250B2 (en) | 2006-05-02 | 2010-04-27 | Callpod, Inc. | Wireless communications connection device |
WO2008119866A1 (en) | 2007-03-30 | 2008-10-09 | Savox Communications Oy Ab (Ltd) | A radio communication device |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1006025B (de) * | 1955-02-09 | 1957-04-11 | Philips Patentverwaltung | Verfahren zur Nachrichtenuebermittlung zwischen einer an ein Fernsprechnetz anschaltbaren Hauptstation und einer insbesondere ortsbeweglichen Unterstation |
DE1099014B (de) * | 1956-02-09 | 1961-02-09 | Bbc Brown Boveri & Cie | Vorrichtung zur selbsttaetigen Einschaltung eines im Wechselsprechverkehr arbeitenden Telefoniesenders |
US3142801A (en) * | 1961-09-21 | 1964-07-28 | Siemens Ag Albis | Portable call-signal receiver with power saving means |
US3458664A (en) * | 1965-10-14 | 1969-07-29 | Motorola Inc | Control unit for mobile radio telephone system |
US3397401A (en) * | 1966-05-27 | 1968-08-13 | Hughes Aircraft Co | Voice operated communication system |
FR1545582A (fr) * | 1967-04-12 | 1968-11-15 | Materiel Telephonique | Perfectionnements aux réseaux radiotéléphoniques mobiles automatiques |
DE1566989A1 (de) * | 1967-04-21 | 1970-02-12 | Bbc Brown Boveri & Cie | Anordnung zur tongesteuerten Sende-Empfangs-Umschaltung |
DE1766215A1 (de) * | 1968-04-20 | 1971-06-09 | Tekade Felten & Guilleaume | Verfahren zur Nachrichtenuebermittlung im Wechselsprechverkehr zwischen einer an das Fernsprechnetz anschaltbaren Hauptstation und einer meist ortsbeweglichen Unterstation ueber eine Simplex-Funkstrecke |
US3586978A (en) * | 1969-04-15 | 1971-06-22 | Gte Automatic Electric Lab Inc | Touch calling radio telephone terminal |
US3628058A (en) * | 1970-02-24 | 1971-12-14 | Motorola Inc | Integrated dual time constant squelch circuit |
US3748584A (en) * | 1971-02-09 | 1973-07-24 | Int Standard Electric Corp | Apparatus for feeding a single sideband receiver |
-
1974
- 1974-01-09 CA CA189,748A patent/CA1018254A/en not_active Expired
- 1974-01-17 GB GB216174A patent/GB1412386A/en not_active Expired
- 1974-03-11 JP JP49027288A patent/JPS49130601A/ja active Pending
- 1974-03-18 BR BR2074/74A patent/BR7402074D0/pt unknown
- 1974-03-19 ZA ZA00741786A patent/ZA741786B/xx unknown
- 1974-03-21 FR FR7409773A patent/FR2223915B1/fr not_active Expired
- 1974-03-21 AU AU66924/74A patent/AU468463B2/en not_active Expired
- 1974-03-22 IL IL44474A patent/IL44474A/en unknown
- 1974-03-28 ES ES424740A patent/ES424740A1/es not_active Expired
- 1974-03-29 DE DE2415332A patent/DE2415332C2/de not_active Expired
Also Published As
Publication number | Publication date |
---|---|
IL44474A (en) | 1977-03-31 |
BR7402074D0 (pt) | 1974-11-05 |
AU6692474A (en) | 1975-09-25 |
CA1018254A (en) | 1977-09-27 |
DE2415332A1 (de) | 1974-11-21 |
FR2223915A1 (es) | 1974-10-25 |
ZA741786B (en) | 1975-03-26 |
IL44474A0 (en) | 1974-07-31 |
AU468463B2 (en) | 1976-01-15 |
DE2415332C2 (de) | 1983-09-08 |
GB1412386A (en) | 1975-11-05 |
JPS49130601A (es) | 1974-12-14 |
FR2223915B1 (es) | 1978-06-02 |
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