GB2250402B - Power saving apparatus of a radiotelephone - Google Patents

Power saving apparatus of a radiotelephone

Info

Publication number
GB2250402B
GB2250402B GB9119982A GB9119982A GB2250402B GB 2250402 B GB2250402 B GB 2250402B GB 9119982 A GB9119982 A GB 9119982A GB 9119982 A GB9119982 A GB 9119982A GB 2250402 B GB2250402 B GB 2250402B
Authority
GB
United Kingdom
Prior art keywords
signal
radiotelephone
frequency
power saving
converting
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 - Fee Related
Application number
GB9119982A
Other versions
GB9119982D0 (en
GB2250402A (en
Inventor
Makoto Aisaka
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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
Priority claimed from JP2260925A external-priority patent/JPH04137926A/en
Priority claimed from JP2305142A external-priority patent/JPH04177954A/en
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of GB9119982D0 publication Critical patent/GB9119982D0/en
Publication of GB2250402A publication Critical patent/GB2250402A/en
Application granted granted Critical
Publication of GB2250402B publication Critical patent/GB2250402B/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
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0245—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal according to signal strength
    • 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
    • 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)
  • Circuits Of Receivers In General (AREA)
  • Superheterodyne Receivers (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The radiotelephone of the invention includes a receiver front end (12) for amplifying a received signal and converting the amplified received signal into a first intermediate-frequency signal, an intermediate-frequency demodulator (13) for converting the first intermediate-frequency signal into a second intermediate-frequency signal to demodulate it and for producing an RSSi signal indicative of strength of the received input signal and a power limitation portion (17 or 18) for limiting power supply to the receiver front end (12) to save consumption power of the receiver when the RSSi signal exceeds a predetermined reference voltage. <IMAGE>
GB9119982A 1990-09-28 1991-09-19 Power saving apparatus of a radiotelephone Expired - Fee Related GB2250402B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2260925A JPH04137926A (en) 1990-09-28 1990-09-28 Power saving device for radio telephone set
JP2305142A JPH04177954A (en) 1990-11-09 1990-11-09 Power saving device for radio telephone set

Publications (3)

Publication Number Publication Date
GB9119982D0 GB9119982D0 (en) 1991-11-06
GB2250402A GB2250402A (en) 1992-06-03
GB2250402B true GB2250402B (en) 1995-06-21

Family

ID=26544821

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9119982A Expired - Fee Related GB2250402B (en) 1990-09-28 1991-09-19 Power saving apparatus of a radiotelephone

Country Status (1)

Country Link
GB (1) GB2250402B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE514943C2 (en) * 1994-01-12 2001-05-21 Ericsson Ge Mobile Communicat Conserving power in battery-powered transceiver
JPH0818500A (en) * 1994-06-30 1996-01-19 Nec Corp Portable radio device
JPH09162773A (en) * 1995-12-07 1997-06-20 Nec Corp Radio transmitter-receiver with consumed current reduction function
EP1215820A3 (en) 2000-12-05 2004-04-14 Zarlink Semiconductor Limited Radio frequency tuner
GB2438911A (en) * 2006-06-09 2007-12-12 Ozonelink Ltd Using RSSI output to enhance equipment performance

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2233846A (en) * 1989-07-01 1991-01-16 Orbitel Mobile Communications Gain control in gsm receiver
EP0462782A2 (en) * 1990-06-16 1991-12-27 Nec Corporation Receiver for a cellular mobile radio communication system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2233846A (en) * 1989-07-01 1991-01-16 Orbitel Mobile Communications Gain control in gsm receiver
EP0462782A2 (en) * 1990-06-16 1991-12-27 Nec Corporation Receiver for a cellular mobile radio communication system

Also Published As

Publication number Publication date
GB9119982D0 (en) 1991-11-06
GB2250402A (en) 1992-06-03

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Legal Events

Date Code Title Description
746 Register noted 'licences of right' (sect. 46/1977)

Effective date: 20031002

PCNP Patent ceased through non-payment of renewal fee

Effective date: 20040919