JPS57152734A - Control system for output power of radio transmitter - Google Patents

Control system for output power of radio transmitter

Info

Publication number
JPS57152734A
JPS57152734A JP56037770A JP3777081A JPS57152734A JP S57152734 A JPS57152734 A JP S57152734A JP 56037770 A JP56037770 A JP 56037770A JP 3777081 A JP3777081 A JP 3777081A JP S57152734 A JPS57152734 A JP S57152734A
Authority
JP
Japan
Prior art keywords
level
diodes
arm
transmission
lowered
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.)
Pending
Application number
JP56037770A
Other languages
Japanese (ja)
Inventor
Masateru Chiba
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP56037770A priority Critical patent/JPS57152734A/en
Publication of JPS57152734A publication Critical patent/JPS57152734A/en
Pending 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
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/28—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non transmission
    • 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
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B2001/0408—Circuits with power amplifiers
    • H04B2001/0416—Circuits with power amplifiers having gain or transmission power control

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transmitters (AREA)

Abstract

PURPOSE:To enhance the set precision of a transmission output level and facilitate initialization for temperature compensation, by detecting the transmission level by diodes, where operation characteristics are equalized to one another easily, and a level converting resistance element. CONSTITUTION:Diodes DD1-DD4 which measure the level of a transmission output have the same characteristic approximately, and detection outputs from these diodes are supplied to one terminal of a comparator CMP through an adjusting arm ARM, and a reference potential is supplied to the other terminal of the comparator CMP from a level adjusting equipment LV including a temperature compensating thermistor TH. When this transmitter TX approaches the base station, a microprocessor PC of a receiver RX detects this approach to set the adjusting arm ARM to the highest position (DDL), and therefore, the amplification gain of a transmission power amplifier PA is lowered, and the power transmitted from an antenna ANT to the base station is lowered.
JP56037770A 1981-03-18 1981-03-18 Control system for output power of radio transmitter Pending JPS57152734A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56037770A JPS57152734A (en) 1981-03-18 1981-03-18 Control system for output power of radio transmitter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56037770A JPS57152734A (en) 1981-03-18 1981-03-18 Control system for output power of radio transmitter

Publications (1)

Publication Number Publication Date
JPS57152734A true JPS57152734A (en) 1982-09-21

Family

ID=12506696

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56037770A Pending JPS57152734A (en) 1981-03-18 1981-03-18 Control system for output power of radio transmitter

Country Status (1)

Country Link
JP (1) JPS57152734A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0247935A (en) * 1988-08-09 1990-02-16 Japan Radio Co Ltd Transmission output control system
US5126686A (en) * 1989-08-15 1992-06-30 Astec International, Ltd. RF amplifier system having multiple selectable power output levels
US5278517A (en) * 1990-11-30 1994-01-11 Nec Corporation FET amplifier with gate voltage control
EP0803973A1 (en) * 1996-04-25 1997-10-29 Lucent Technologies Inc. Linear power amplifier with automatic gate/base bias control for optimum efficiency

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0247935A (en) * 1988-08-09 1990-02-16 Japan Radio Co Ltd Transmission output control system
US5126686A (en) * 1989-08-15 1992-06-30 Astec International, Ltd. RF amplifier system having multiple selectable power output levels
US5278517A (en) * 1990-11-30 1994-01-11 Nec Corporation FET amplifier with gate voltage control
EP0803973A1 (en) * 1996-04-25 1997-10-29 Lucent Technologies Inc. Linear power amplifier with automatic gate/base bias control for optimum efficiency

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