BR7402074D0 - COMMUNICATIONS RADIO SYSTEM, INTEGRAL AND PORTABLE DUPLEY - Google Patents

COMMUNICATIONS RADIO SYSTEM, INTEGRAL AND PORTABLE DUPLEY

Info

Publication number
BR7402074D0
BR7402074D0 BR2074/74A BR207474A BR7402074D0 BR 7402074 D0 BR7402074 D0 BR 7402074D0 BR 2074/74 A BR2074/74 A BR 2074/74A BR 207474 A BR207474 A BR 207474A BR 7402074 D0 BR7402074 D0 BR 7402074D0
Authority
BR
Brazil
Prior art keywords
dupley
portable
integral
radio system
communications radio
Prior art date
Application number
BR2074/74A
Other languages
Portuguese (pt)
Inventor
D Linder
O Eness
Jr C Lynk
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 BR7402074D0 publication Critical patent/BR7402074D0/en

Links

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)
BR2074/74A 1973-03-29 1974-03-18 COMMUNICATIONS RADIO SYSTEM, INTEGRAL AND PORTABLE DUPLEY BR7402074D0 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US34620373A 1973-03-29 1973-03-29

Publications (1)

Publication Number Publication Date
BR7402074D0 true BR7402074D0 (en) 1974-11-05

Family

ID=23358388

Family Applications (1)

Application Number Title Priority Date Filing Date
BR2074/74A BR7402074D0 (en) 1973-03-29 1974-03-18 COMMUNICATIONS RADIO SYSTEM, INTEGRAL AND PORTABLE DUPLEY

Country Status (10)

Country Link
JP (1) JPS49130601A (en)
AU (1) AU468463B2 (en)
BR (1) BR7402074D0 (en)
CA (1) CA1018254A (en)
DE (1) DE2415332C2 (en)
ES (1) ES424740A1 (en)
FR (1) FR2223915B1 (en)
GB (1) GB1412386A (en)
IL (1) IL44474A (en)
ZA (1) ZA741786B (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7806618A (en) * 1978-06-20 1979-12-27 Philips Nv SATELLITE COMMUNICATION SYSTEM FOR VOICE AND TELEGRAPHY.
EP0011063B1 (en) * 1978-11-11 1983-07-20 International Mobile Machines Corporation Portable radiotelephone system
IT1202809B (en) * 1978-12-22 1989-02-09 Sits Soc It Telecom Siemens LINE TRANSLATOR FOR RADIO-TELEPHONE SYSTEMS
GB2121649A (en) * 1982-05-04 1983-12-21 Edward Desmond Bishop Cordless transmission in audio reproduction system
DE3219953C2 (en) * 1982-05-27 1984-09-27 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Transfer arrangement for the transfer of calls from a two-wire line to an intercom
DE3479947D1 (en) * 1983-06-27 1989-11-02 Commw Of Australia Squelch circuit
GB2155279A (en) * 1984-03-03 1985-09-18 Standard Telephones Cables Ltd Cordless telephone
FR2577367B1 (en) * 1985-02-13 1988-03-11 Alsatel Radio Telecommunicatio RADIOTELEPHONE COMMUNICATION DEVICE
DE3514462A1 (en) * 1985-04-22 1986-10-23 Sennheiser Electronic Kg, 3002 Wedemark Method for wireless transmission of messages
JPS6387845A (en) * 1986-09-30 1988-04-19 Juki Corp Cordless telephone set
DE9115204U1 (en) * 1991-12-07 1992-05-27 RR Elektronische Geräte GmbH + Co KG, 2300 Kiel Antenna filter
JP2586440B2 (en) * 1994-05-09 1997-02-26 日本電気株式会社 Mobile communication system
JPH08186624A (en) * 1994-12-28 1996-07-16 Nec Corp Cordless telephone system
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
US8224286B2 (en) * 2007-03-30 2012-07-17 Savox Communications Oy Ab (Ltd) Radio communication device

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1006025B (en) * 1955-02-09 1957-04-11 Philips Patentverwaltung Method for the transmission of messages between a main station that can be connected to a telephone network and an in particular mobile substation
DE1099014B (en) * 1956-02-09 1961-02-09 Bbc Brown Boveri & Cie Device for automatic activation of a telephony transmitter operating in two-way communication
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 (en) * 1967-04-12 1968-11-15 Materiel Telephonique Improvements to automatic mobile radiotelephone networks
DE1566989A1 (en) * 1967-04-21 1970-02-12 Bbc Brown Boveri & Cie Arrangement for tone-controlled transmission / reception switching
DE1766215A1 (en) * 1968-04-20 1971-06-09 Tekade Felten & Guilleaume Method for message transmission in two-way communication between a main station that can be connected to the telephone network and a mostly mobile substation via a simplex radio link
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

Also Published As

Publication number Publication date
FR2223915A1 (en) 1974-10-25
ZA741786B (en) 1975-03-26
DE2415332C2 (en) 1983-09-08
AU6692474A (en) 1975-09-25
GB1412386A (en) 1975-11-05
JPS49130601A (en) 1974-12-14
CA1018254A (en) 1977-09-27
DE2415332A1 (en) 1974-11-21
AU468463B2 (en) 1976-01-15
IL44474A (en) 1977-03-31
IL44474A0 (en) 1974-07-31
ES424740A1 (en) 1976-11-01
FR2223915B1 (en) 1978-06-02

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