CA2058358A1 - Portable telephone - Google Patents

Portable telephone

Info

Publication number
CA2058358A1
CA2058358A1 CA2058358A CA2058358A CA2058358A1 CA 2058358 A1 CA2058358 A1 CA 2058358A1 CA 2058358 A CA2058358 A CA 2058358A CA 2058358 A CA2058358 A CA 2058358A CA 2058358 A1 CA2058358 A1 CA 2058358A1
Authority
CA
Canada
Prior art keywords
voltage
built
external
battery
power source
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.)
Granted
Application number
CA2058358A
Other languages
French (fr)
Other versions
CA2058358C (en
Inventor
Naoki Hirasawa
Shinichi Kobayashi
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.)
NEC Corp
Original Assignee
Naoki Hirasawa
Shinichi Kobayashi
Nec Corporation
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 Naoki Hirasawa, Shinichi Kobayashi, Nec Corporation filed Critical Naoki Hirasawa
Publication of CA2058358A1 publication Critical patent/CA2058358A1/en
Application granted granted Critical
Publication of CA2058358C publication Critical patent/CA2058358C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • H04W52/0261—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level
    • H04W52/0296—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level switching to a backup power supply
    • 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

Abstract

A portable telephone including a synthesized local oscillator using a voltage controlled oscillator in the receiver section and receiving its operation power from either built-in battery or an external power source. A
first external voltage substantially equal to the output voltage of the built-in batteries and a second external voltage higher than the first voltage are used as the external power source voltage. The output voltage of the built-in battery and the second external voltage are supplied to the voltage controlled oscillator in response to the use of the built-in battery and the external power source, respectively.
CA002058358A 1990-12-26 1991-12-23 Portable telephone Expired - Fee Related CA2058358C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2406395A JP2968592B2 (en) 1990-12-26 1990-12-26 Mobile phone
JP406395/1990 1990-12-26

Publications (2)

Publication Number Publication Date
CA2058358A1 true CA2058358A1 (en) 1992-06-27
CA2058358C CA2058358C (en) 1996-02-20

Family

ID=18516010

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002058358A Expired - Fee Related CA2058358C (en) 1990-12-26 1991-12-23 Portable telephone

Country Status (6)

Country Link
US (1) US5548823A (en)
EP (1) EP0494529B1 (en)
JP (1) JP2968592B2 (en)
AU (1) AU646526B2 (en)
CA (1) CA2058358C (en)
DE (1) DE69113977T2 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6041242A (en) * 1996-06-21 2000-03-21 Coulthard; Steve M. Portable emergency response communications system and method
JPH10145255A (en) * 1996-11-14 1998-05-29 Nec Shizuoka Ltd Radio signal selective calling system and selective calling method
US6480727B1 (en) 1999-01-12 2002-11-12 Tellabs Operations, Inc. Using inactivity levels to extend subscriber equipment battery life
JP3875458B2 (en) 2000-06-30 2007-01-31 株式会社東芝 Transmitter / receiver integrated high-frequency device
US8494479B2 (en) 2006-04-27 2013-07-23 Honeywell International Inc. System and method for optimizing power supplies in a wireless transceiver
KR20090032270A (en) * 2007-09-27 2009-04-01 삼성전자주식회사 Apparatus for controling power in a wireless mobile terminal
US8472890B2 (en) * 2007-11-20 2013-06-25 Qualcomm Incorporated Adjustable local oscillator path in a communication device with a transmitter
US8362747B2 (en) * 2008-09-10 2013-01-29 Intel Mobile Communications GmbH Method of powering a mobile device
US20140378065A1 (en) * 2013-06-19 2014-12-25 Motorola Solutions, Inc. Method and apparatus for selectively configuring a two-way radio device to operate in a control station mode or a non-control station mode

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3260966A (en) * 1963-09-16 1966-07-12 Midwestern Instr Inc Bias controlled amplitude modulator
JPS51117510A (en) * 1975-04-07 1976-10-15 Shintou Denki Kk Double superheterodyne receiver
JPS6110329A (en) * 1984-06-25 1986-01-17 Nec Corp Battery saving device of radio equipment
JPH0352048Y2 (en) * 1985-04-30 1991-11-11
US4881258A (en) * 1986-08-20 1989-11-14 Matsushita Electric Industrial Co., Ltd. Portable type mobile radio telephone
JPS63233638A (en) * 1987-03-21 1988-09-29 Aisin Seiki Co Ltd Vehicle telephone system
CA1292336C (en) * 1987-07-16 1991-11-19 Masayuki Makino Cordless telephone with battery saving function
JPS6485431A (en) * 1987-09-28 1989-03-30 Toshiba Corp Radio telephone system
JPH0650825B2 (en) * 1988-01-29 1994-06-29 日本電気株式会社 Wireless telephone
US5203020A (en) * 1988-06-14 1993-04-13 Kabushiki Kaisha Toshiba Method and apparatus for reducing power consumption in a radio telecommunication apparatus
US5170494A (en) * 1988-12-08 1992-12-08 Nokia Mobile Phones Ltd. Two piece radio telephone
JP2773228B2 (en) * 1989-04-20 1998-07-09 日本電気株式会社 Mobile phone
US4989260A (en) * 1989-05-17 1991-01-29 The Quaker Oats Company Transmitter with power reduction to compensate for varying radiated electric field strength when switching between batteries and AC power
US5036532A (en) * 1989-08-03 1991-07-30 Motorola, Inc. Portable telephone with power source/mode change during calls
JP2629436B2 (en) * 1989-10-31 1997-07-09 日本電気株式会社 Power supply for in-vehicle electronic equipment
JPH04239251A (en) * 1991-01-11 1992-08-27 Toshiba Corp Radio telephony equipment adaptor
US5136229A (en) * 1991-07-15 1992-08-04 Galvin Jay M Power pack device

Also Published As

Publication number Publication date
DE69113977T2 (en) 1996-05-30
EP0494529B1 (en) 1995-10-18
US5548823A (en) 1996-08-20
AU646526B2 (en) 1994-02-24
CA2058358C (en) 1996-02-20
AU8999791A (en) 1992-07-02
JP2968592B2 (en) 1999-10-25
JPH0730475A (en) 1995-01-31
DE69113977D1 (en) 1995-11-23
EP0494529A1 (en) 1992-07-15

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed