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公开(公告)号：JP2001068942A
公开(公告)日：2001-03-16
申请号：JP2000216760
申请日：2000-07-18
Applicant: MOTOROLA INC
Inventor： KLOMSDORF ARMIN , WINKELMANN LUKE EDWARD , MICHAEL RANDOHAARU
Abstract: PROBLEM TO BE SOLVED: To provide a power amplification load adjustment system that accurately controls impedance provided to a power amplifier output with a variable impedance network over a wide range. SOLUTION: This system 200 is provided with an amplifier 32 and a variable impedance network 36 coupled with the output of this amplifier 32. The variable impedance network 36 provides a plurality of kinds of impedance sets to the output of the power amplifier 32 in response to a load control signal. A control circuit generates a transmission power command and a channel frequency command. A memory 40 stores a plurality of control variables as a function of the output power and the frequency. The variable impedance network 36, the control circuit and a processor 38 connected to the control circuit extract a plurality of control variables in response to the transmission power command and the channel frequency command and generate a load control signal by using them.
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公开(公告)号：BR0002979A
公开(公告)日：2001-07-31
申请号：BR0002979
申请日：2000-07-19
Applicant: MOTOROLA INC
Inventor： KLOMSDORF ARMIN , WINKELMANN LUKE EDWARD , LANDHERR MICHAEL
IPC: H03F3/24 , H03F1/02 , H03F1/56 , H03F3/20 , H03G3/02 , H04B1/18 , H04B1/52 , H03G3/30 , H03F3/21
Abstract: A power amplifier load adjust system includes a power amplifier and a variable impedance network coupled to the output of the power amplifier. The variable impedance network presents a plurality of impedances to the output of the power amplifier responsive to a load control signal. A control circuit generates a transmit power command and a channel frequency command. Memory stores a plurality of control values as a function of output power and frequency. A processing circuit coupled to the variable impedance network, the control circuit, and the memory retrieves the plurality of control values and uses them to generate the load control signal in response to the transmit power command and the channel frequency command.
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公开(公告)号：DE10035066A1
公开(公告)日：2001-03-15
申请号：DE10035066
申请日：2000-07-17
Applicant: MOTOROLA INC
Inventor： KLOMSDORF ARMIN , WINKELMANN LUKE EDWARD , LANDHERR MICHAEL
IPC: H03F3/24 , H03F1/02 , H03F1/56 , H03F3/20 , H03G3/02 , H04B1/18 , H04B1/52 , H03G3/20 , H04B1/40
Abstract: The system includes a variable-impedance network (36), connected to the output of a power amplifier (32). The network provides a number of impedances in response to a load control signal at the output of the power amplifier. A control circuit generates a transmission power commend and a channel frequency command. A memory (40) stores a number of control values as a function of the output power and the operating frequency of the power amplifier (32). A processing circuit (38) is connected to the variable-impedance network, the control circuit and the memory. The processing circuit retrieves the control values stored in the memory, and uses them to generate the load control signal in response to the transmission power command. An Independent claim is included for a method of controlling a variable-impedance network at the output of a power amplifier.
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公开(公告)号：DE10035066B4
公开(公告)日：2009-07-16
申请号：DE10035066
申请日：2000-07-17
Applicant: MOTOROLA INC
Inventor： KLOMSDORF ARMIN , WINKELMANN LUKE EDWARD , LANDHERR MICHAEL
IPC: H03F3/24 , H03G3/20 , H03F1/02 , H03F1/56 , H03F3/20 , H03G3/02 , H04B1/18 , H04B1/40 , H04B1/52
Abstract: A power amplifier load adjust system includes a power amplifier and a variable impedance network coupled to the output of the power amplifier. The variable impedance network presents a plurality of impedances to the output of the power amplifier responsive to a load control signal. A control circuit generates a transmit power command and a channel frequency command. Memory stores a plurality of control values as a function of output power and frequency. A processing circuit coupled to the variable impedance network, the control circuit, and the memory retrieves the plurality of control values and uses them to generate the load control signal in response to the transmit power command and the channel frequency command.
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公开(公告)号：GB2356094B
公开(公告)日：2002-02-13
申请号：GB0017423
申请日：2000-07-14
Applicant: MOTOROLA INC
Inventor： KLOMSDORF ARMIN WERNER , WINKELMANN LUKE EDWARD , LANDHERR MICHAEL
Abstract: A power amplifier load adjust system includes a power amplifier and a variable impedance network coupled to the output of the power amplifier. The variable impedance network presents a plurality of impedances to the output of the power amplifier responsive to a load control signal. A control circuit generates a transmit power command and a channel frequency command. Memory stores a plurality of control values as a function of output power and frequency. A processing circuit coupled to the variable impedance network, the control circuit, and the memory retrieves the plurality of control values and uses them to generate the load control signal in response to the transmit power command and the channel frequency command.
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Patent Agency Ranking6.发明专利
公开(公告)号：GB2352897B
公开(公告)日：2001-09-05
申请号：GB0017436
申请日：2000-07-14
Applicant: MOTOROLA INC
Inventor： KLOMSDORF ARMIN WERNER , ALBERTH WILLIAM P , WINKELMANN LUKE EDWARD
Abstract: A power amplifying circuit with load adjust for control of adjacent and alternate channel power. A power amplifier amplifies an input signal to produce an amplified signal. A variable impedance network presents different impedances to the output of the power amplifier responsive to a load control signal. A peak-to-average detector provides an indication of a peak-to-average ratio of the amplified signal. A controller coupled to the peak-to-average detector and the variable impedance network produces the load control signal responsive to the indication of the peak-to-average ratio.
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公开(公告)号：GB2356094A
公开(公告)日：2001-05-09
申请号：GB0017423
申请日：2000-07-14
Applicant: MOTOROLA INC
Inventor： KLOMSDORF ARMIN WERNER , WINKELMANN LUKE EDWARD , LANDHERR MICHAEL
Abstract: A power amplifier load adjust system (200) includes a power amplifier (32) and a variable impedance network (36) coupled to the output of the power amplifier (32). The variable impedance network (36) presents a plurality of impedances to the output of the power amplifier (32) responsive to a load control signal. A control circuit generates a transmit power command and a channel frequency command. Memory (40) stores a plurality of control values as a function of output power and frequency. A processing circuit (38) coupled to the variable impedance network (36), the control circuit (20), and the memory (40) retrieves the plurality of control values and uses them to generate the load control signal in response to the transmit power command and the channel frequency command.
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公开(公告)号：GB2356095B
公开(公告)日：2002-02-13
申请号：GB0017433
申请日：2000-07-14
Applicant: MOTOROLA INC
Inventor： ALBERTH WILLIAM P , KLOMSDORF ARMIN WERNER , WINKELMANN LUKE EDWARD
Abstract: An amplifier system to increase the efficiency of amplification systems that employ linear modulation schemes. The amplifier system has a signal amplifier for receiving a constant amplitude input signal and producing an amplified version of the input signal. A variable impedance network presents various impedances to an output of the signal amplifier responsive to a load control signal. An envelope mapping circuit coupled to the variable impedance network produces the load control signal responsive to a desired amplitude modulation (AM) envelope. The various impedances causes the desired AM envelope to be impressed upon the amplified version of the input signal.
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公开(公告)号：GB2356093B
公开(公告)日：2001-12-12
申请号：GB0017401
申请日：2000-07-14
Applicant: MOTOROLA INC
Inventor： ALBERTH WILLIAM P , KLOMSDORF ARMIN WERNER , WINKELMANN LUKE EDWARD
Abstract: A load envelope following (LEF) amplifier system to increase the efficiency of amplification systems that employ linear modulation schemes. The LEF system has a signal amplifier for receiving an input signal that has an amplitude modulation (AM) envelope. The signal amplifier produces an amplified version of the input signal. A variable impedance network is coupled to an output of the signal amplifier and substantially continuously presents various impedances to the output of the signal amplifier in response to a load control signal. An envelope mapping circuit is coupled to the variable impedance network to produce the load control signal in response to and indicative of the substantially continuously varying amplitude of the AM envelope of the input signal.
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公开(公告)号：GB2356095A
公开(公告)日：2001-05-09
申请号：GB0017433
申请日：2000-07-14
Applicant: MOTOROLA INC
Inventor： ALBERTH WILLIAM P , KLOMSDORF ARMIN WERNER , WINKELMANN LUKE EDWARD
Abstract: A transmitter amplifying arrangement for linear modulation schemes is described, in which the signal in the power amplifier 118 is amplified as a constant envelope signal, so that efficient amplification may be used, eg class C. An impedance network 120 following the amplifier is then controlled to produce the desired amplitude modulation. A pre-distortion arrangement is also described.
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