GB1412386A - Portable telephone system having a battery saver feature - Google Patents

Portable telephone system having a battery saver feature

Info

Publication number
GB1412386A
GB1412386A GB216174A GB216174A GB1412386A GB 1412386 A GB1412386 A GB 1412386A GB 216174 A GB216174 A GB 216174A GB 216174 A GB216174 A GB 216174A GB 1412386 A GB1412386 A GB 1412386A
Authority
GB
United Kingdom
Prior art keywords
transmitter
base station
portable
receiver
radio
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
GB216174A
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.)
Motorola Solutions Inc
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 GB1412386A publication Critical patent/GB1412386A/en
Expired legal-status Critical Current

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)

Abstract

1412386 Radio signalling MOTOROLA Inc 17 Jan 1974 [29 March 1973] 2161/74 Heading H4L In a radio communication system, a portable transmitter-receiver operates on different carrier frequencies in each direction to provide duplex speech communication via a base station which may be linked to a telephone exchange, the portable transmitter-receiver includes a detector coupled to the microphone circuit of the transmitter which renders said transmitter operative only in the presence of speech (or a calling signal) and at the base station the base station receiver is muted in the absence of received signals. The arrangement provides battery saving at the portable station. As described, the radio link uses frequency modulation. A plurality of push-buttons control corresponding oscillators to provide the calling signal.
GB216174A 1973-03-29 1974-01-17 Portable telephone system having a battery saver feature Expired GB1412386A (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
GB1412386A true GB1412386A (en) 1975-11-05

Family

ID=23358388

Family Applications (1)

Application Number Title Priority Date Filing Date
GB216174A Expired GB1412386A (en) 1973-03-29 1974-01-17 Portable telephone system having a battery saver feature

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)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2121649A (en) * 1982-05-04 1983-12-21 Edward Desmond Bishop Cordless transmission in audio reproduction system
GB2155279A (en) * 1984-03-03 1985-09-18 Standard Telephones Cables Ltd Cordless telephone
GB2296629A (en) * 1994-12-28 1996-07-03 Nec Corp Cordless telephone system
WO2008119866A1 (en) 2007-03-30 2008-10-09 Savox Communications Oy Ab (Ltd) A radio communication device

Families Citing this family (12)

* 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.
DE2862297D1 (en) * 1978-11-11 1983-08-25 Int Mobile Machines Portable radiotelephone system
IT1202809B (en) * 1978-12-22 1989-02-09 Sits Soc It Telecom Siemens LINE TRANSLATOR FOR RADIO-TELEPHONE SYSTEMS
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
JPS61501883A (en) * 1983-06-27 1986-08-28 ザ　コモンウエルス　オブ　オ−ストラリア squelch circuit
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
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

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

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2121649A (en) * 1982-05-04 1983-12-21 Edward Desmond Bishop Cordless transmission in audio reproduction system
GB2155279A (en) * 1984-03-03 1985-09-18 Standard Telephones Cables Ltd Cordless telephone
GB2296629A (en) * 1994-12-28 1996-07-03 Nec Corp Cordless telephone system
US5724661A (en) * 1994-12-28 1998-03-03 Nec Corporation Cordless telephone system which converts a protocol for call connection
GB2296629B (en) * 1994-12-28 1999-06-09 Nec Corp Cordless telephone system
WO2008119866A1 (en) 2007-03-30 2008-10-09 Savox Communications Oy Ab (Ltd) A radio communication device
EP2137722A1 (en) * 2007-03-30 2009-12-30 Savox Communications Oy AB (LTD) A radio communication device
EP2137722A4 (en) * 2007-03-30 2014-06-25 Savox Comm Oy Ab Ltd A radio communication device

Also Published As

Publication number Publication date
ZA741786B (en) 1975-03-26
FR2223915A1 (en) 1974-10-25
AU6692474A (en) 1975-09-25
DE2415332A1 (en) 1974-11-21
AU468463B2 (en) 1976-01-15
IL44474A0 (en) 1974-07-31
CA1018254A (en) 1977-09-27
BR7402074D0 (en) 1974-11-05
ES424740A1 (en) 1976-11-01
FR2223915B1 (en) 1978-06-02
JPS49130601A (en) 1974-12-14
IL44474A (en) 1977-03-31
DE2415332C2 (en) 1983-09-08

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee