CA2072582A1 - Power control circuitry for a tdma radio frequency transmitter - Google Patents

Power control circuitry for a tdma radio frequency transmitter

Info

Publication number
CA2072582A1
CA2072582A1 CA2072582A CA2072582A CA2072582A1 CA 2072582 A1 CA2072582 A1 CA 2072582A1 CA 2072582 A CA2072582 A CA 2072582A CA 2072582 A CA2072582 A CA 2072582A CA 2072582 A1 CA2072582 A1 CA 2072582A1
Authority
CA
Canada
Prior art keywords
transmitter
cellular telephone
tdma cellular
power control
control circuitry
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
CA2072582A
Other languages
French (fr)
Other versions
CA2072582C (en
Inventor
Thomas J. Walczak
Stephen V. Cahill
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 Mobility LLC
Original Assignee
Thomas J. Walczak
Stephen V. Cahill
Motorola, Inc.
Motorola Mobility, 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 Thomas J. Walczak, Stephen V. Cahill, Motorola, Inc., Motorola Mobility, Inc. filed Critical Thomas J. Walczak
Publication of CA2072582A1 publication Critical patent/CA2072582A1/en
Application granted granted Critical
Publication of CA2072582C publication Critical patent/CA2072582C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/204—Multiple access
    • H04B7/212—Time-division multiple access [TDMA]
    • 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
    • H04W52/52—TPC using AGC [Automatic Gain Control] circuits or amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • 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
    • H03G3/3047—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers in modulators, frequency-changers, transmitters or power amplifiers for intermittent signals, e.g. burst 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
    • 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
    • H04B1/403—Circuits using the same oscillator for generating both the transmitter frequency and the receiver local oscillator frequency
    • 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
    • H04B1/54—Circuits using the same frequency for two directions of communication
    • H04B1/56—Circuits using the same frequency for two directions of communication with provision for simultaneous communication in two directions

Abstract

A TDMA cellular telephone (600) includes, in its transmit signal path, microphone (608), vocoder (612), data format circui-try (601), quadrature modulator (602), 90 MHz local oscillator (606), transmitter with mixer (604), transmitter filter (618), and an-tenna (620). In its receive signal path, the TDMA cellular telephone (600) includes receiver filter (622) coupled to antenna (620), quadrature demodulator (624), and data deformat circuitry (625). The channel frequency of TDMA cellular telephone (600) is loaded into synthesizer (616) by microcomputer (614) and applied to transmitter (604) and demodulator (624). TDMA cellular telephone (600) is controlled by microcomputer (614) which includes a memory with a control and signaling computer program stored therein. Transmitter (604) includes novel power control circuitry (100) comprised of variable gain stage (104), mixer (106), bandpass filter (109), and directional coupler (112) in a forward path, and detector (116), A/D converter (118), digital controller (120), and D/A converter (126) in a feedback path.
CA002072582A 1990-12-20 1991-12-18 Power control circuitry for a tdma radio frequency transmitter Expired - Lifetime CA2072582C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US63223190A 1990-12-20 1990-12-20
US632,231 1990-12-20

Publications (2)

Publication Number Publication Date
CA2072582A1 true CA2072582A1 (en) 1992-06-21
CA2072582C CA2072582C (en) 1996-04-09

Family

ID=24534645

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002072582A Expired - Lifetime CA2072582C (en) 1990-12-20 1991-12-18 Power control circuitry for a tdma radio frequency transmitter

Country Status (10)

Country Link
US (1) US5193223A (en)
JP (1) JP2868899B2 (en)
KR (1) KR960007138B1 (en)
BR (1) BR9106405A (en)
CA (1) CA2072582C (en)
DE (1) DE4193230C1 (en)
GB (1) GB2257331B (en)
HK (1) HK67097A (en)
MX (1) MX173851B (en)
WO (1) WO1992011705A1 (en)

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Also Published As

Publication number Publication date
WO1992011705A1 (en) 1992-07-09
CA2072582C (en) 1996-04-09
MX9102726A (en) 1992-07-01
HK67097A (en) 1997-05-30
DE4193230C1 (en) 1997-10-30
KR960007138B1 (en) 1996-05-27
JP2868899B2 (en) 1999-03-10
GB2257331A (en) 1993-01-06
US5193223A (en) 1993-03-09
MX173851B (en) 1994-04-06
GB2257331B (en) 1995-04-26
JPH05508525A (en) 1993-11-25
KR920704459A (en) 1992-12-19
GB9217653D0 (en) 1992-10-28
BR9106405A (en) 1993-05-04

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