EP0151148A1 - Emetteur avec commande d'amplificateur de puissance - Google Patents

Emetteur avec commande d'amplificateur de puissance

Info

Publication number
EP0151148A1
EP0151148A1 EP84902631A EP84902631A EP0151148A1 EP 0151148 A1 EP0151148 A1 EP 0151148A1 EP 84902631 A EP84902631 A EP 84902631A EP 84902631 A EP84902631 A EP 84902631A EP 0151148 A1 EP0151148 A1 EP 0151148A1
Authority
EP
European Patent Office
Prior art keywords
voltage
power
sourσe
output
signal
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.)
Withdrawn
Application number
EP84902631A
Other languages
German (de)
English (en)
Inventor
Raymond William Simpson
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.)
Prutec Ltd
Original Assignee
Prutec 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 Prutec Ltd filed Critical Prutec Ltd
Publication of EP0151148A1 publication Critical patent/EP0151148A1/fr
Withdrawn legal-status Critical Current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
    • H03G3/3036—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers
    • H03G3/3042—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers in modulators, frequency-changers, transmitters or power amplifiers
    • 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

Definitions

  • the present invention relates to a mobile transmitter and is particularly concerned with making efficient use of power in the power amplifier of such a transmitter.
  • the output power is required to be regulated in discrete steps as commanded by a fixed base station.
  • the amount of power transmitted should be sufficient to provide clear communication with the nearest cell site but 3 should not be sufficiently powerful to interfere with the use of the same channel in nearby cell sites. For this reason, the mobile transmitter must be capable of regulating its power output in dependence upon a received command from the base station.
  • the transmitter When the transmitter is a portable radio telephone, it is important to maintain a high DC to RF power conversion efficiency at least at the higher power levels because this will help maximise battery life. It is not sufficient, however, to maximise only the highest power level efficiency as the portable radio telephone may also be operated at its second or third power levels for significant proportions of its battery life.
  • a mobile transmitter for use in a cellular system having a power output stage of which the output power is control ⁇ lable in dependence upon a received signal and a voltage supply for the output stage of the transmitter, wherein the voltage supply ⁇ omprises a low voltage source, a high voltage source and means for switching between the two voltage sources in dependence upon the power of the signal to be transmitted.
  • a mobile radio is often installed in a vehicle and for the purpose of powering other parts of the radio there is usually already provided a steady 5 V supply in addition to the vehicle's 12 V supply.
  • the 5 V supply is derived using a chopper circuit and is therefore an efficient means of stepping down the DC voltage.
  • use is made of the two existing voltages to supply the power output stage at different times depending upon the required power output. At the higher power levels, the output stage is conne ⁇ ted to the r-
  • FIG. 1 is a block circuit diagram of a mobile transmitter in accordance with the present invention.
  • Figure 2 is a more detailed circuit diagram of three of the blocks in Figure 1.
  • an input terminal 10 is arranged to receive a signal to be transmitted this being a modulated radio frequency signal.
  • the signal 10 is applied to a driver stage 12 the output of whi ⁇ h is fed to a power amplifier 14.
  • the output from the power amplifier 14 is fed to a transmitting antenna 16.
  • a signal from the fixed station is re ⁇ eived and applied to a latch cir ⁇ uit 18 by way of a terminal 20.
  • the demand signal lat ⁇ hed in the cir ⁇ uit 18 is de ⁇ oded by a de ⁇ oder 22 whi ⁇ h ⁇ onverts the re ⁇ eived digital signal into an analogue signal.
  • the analogue signal from the de ⁇ oder 22 is fed as a first input to a ⁇ omparator 24 setting the desired output level.
  • the ⁇ omparator 24 re ⁇ eives a se ⁇ ond input from an RF dete ⁇ tor 26 ⁇ onne ⁇ ted to the power output amplifier 14, this se ⁇ ond input to the ⁇ omparator being indi ⁇ ative of the a ⁇ tual transmitted level.
  • the ⁇ omparator 24 ⁇ ompares the desired and a ⁇ tual value of the transmitted power level and ⁇ ontrols the driver stage 12 to ⁇ omplete a negative feedba ⁇ k loop whi ⁇ h mat ⁇ hes the transmitted level to that demanded over the terminal 20.
  • the ⁇ ir ⁇ uit is ⁇ onventional and in su ⁇ h ⁇ onventional ⁇ ir ⁇ uits the power output amplifier is ⁇ onne ⁇ ted to re ⁇ eive a ⁇ onstant supply of voltage.
  • a power supply ⁇ ir ⁇ uit 30 is provided whi ⁇ h additionally alters the voltage supply to the power output amplifier 14 in dependen ⁇ e upon the analogue output signal of the de ⁇ oder 22.
  • a signal is applied to the base of a ⁇ ontrol transistor 30A whi ⁇ h forms part of the power supply ⁇ ir ⁇ uit.
  • the transistor 30A is ⁇ ondu ⁇ tive, a voltage drop a ⁇ ross its ⁇ olle ⁇ tor load resistor is applied to a power transistor 30B whi ⁇ h then be ⁇ omes ⁇ ondu ⁇ tive and enables a 12 V supply to be applied to the ⁇ olle ⁇ tor of a transistor 14A of the power output stage.
  • the ⁇ ir ⁇ uit enables the ⁇ olle ⁇ tor voltage of the power output transistor 14A to be varied in dependen ⁇ e upon the desired output level without resorting to inefficient vol ⁇ tage regulators and using only a second 5 V supply which is ordinarily present and provided by an efficient chopper cir ⁇ uit.

Landscapes

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

Abstract

Un émetteur mobile, utilisé dans un système radio cellulaire, possède un étage de puissance de sortie (14) et une alimentation en tension (30) fournissant une puissance à l'étage de sortie (14). L'alimentation en tension (30) possède une source à basse tension (+5 V) et une source à haute tension (+12 V). Un circuit de commutation relie de manière sélective l'une des deux sources de tension à l'étage de sortie (14) en réponse à un décodeur (22) prévu pour décoder un signal de demande codé numériquement et émis par une station de base.
EP84902631A 1983-06-17 1984-06-04 Emetteur avec commande d'amplificateur de puissance Withdrawn EP0151148A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US50545783A 1983-06-17 1983-06-17
US505457 1983-06-17

Publications (1)

Publication Number Publication Date
EP0151148A1 true EP0151148A1 (fr) 1985-08-14

Family

ID=24010389

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84902631A Withdrawn EP0151148A1 (fr) 1983-06-17 1984-06-04 Emetteur avec commande d'amplificateur de puissance

Country Status (3)

Country Link
EP (1) EP0151148A1 (fr)
AU (1) AU3103484A (fr)
WO (1) WO1985000082A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0644716B2 (ja) * 1984-08-14 1994-06-08 日本電気株式会社 無線通信装置
US4636741A (en) * 1985-11-01 1987-01-13 Motorola, Inc. Multi-level power amplifying circuitry for portable radio transceivers
ATE334514T1 (de) * 2003-03-27 2006-08-15 Koninkl Philips Electronics Nv Verfahren und system zum leistungsersparnis in einem sender und sender

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2844712A (en) * 1954-01-14 1958-07-22 Rca Corp Automatic power reducer for transmitters
US2896073A (en) * 1957-09-13 1959-07-21 Sinclair Oil & Gas Company Apparatus to automatically control transmitter power
US3151295A (en) * 1960-12-08 1964-09-29 Gen Electric Communication system employing means for adjusting the power between control and relay stations
US3900823A (en) * 1973-03-28 1975-08-19 Nathan O Sokal Amplifying and processing apparatus for modulated carrier signals
US4199723A (en) * 1978-02-24 1980-04-22 Rockwell International Corporation Automatic modulation control apparatus
JPS5694848A (en) * 1979-12-28 1981-07-31 Nec Corp Control system of transmitter

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8500082A1 *

Also Published As

Publication number Publication date
WO1985000082A1 (fr) 1985-01-03
AU3103484A (en) 1985-01-11

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

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18D Application deemed to be withdrawn

Effective date: 19850520

RIN1 Information on inventor provided before grant (corrected)

Inventor name: SIMPSON, RAYMOND, WILLIAM