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公开(公告)号：WO2007089994B1
公开(公告)日：2008-07-10
申请号：PCT/US2007060734
申请日：2007-01-19
Applicant: MOTOROLA INC , MITZLAFF JAMES E , MATHES PATRICK C , HAGEN RODNEY
Inventor： MITZLAFF JAMES E , MATHES PATRICK C , HAGEN RODNEY
IPC: H03G3/20
CPC classification number: H04B1/0475 , H03F1/02 , H03F1/0227 , H03F1/3294 , H03F3/24 , H04B2001/045
Abstract: A supply voltage to a power amplifier is controlled. A signal at a single point in a power amplifier is detected (600). A signal parameter is determined (602) for the detected signal. The signal parameter is compared (604) to at least one predetermined limit. This comparison result is used to determine (606) whether to adjust (608) a supply voltage to the power amplifier. The signal parameter is, for example, an average power or a peak-to-average power ratio.
Abstract translation: 控制到功率放大器的电源电压。 检测功率放大器中的单个点处的信号（600）。 确定检测信号的信号参数（602）。 信号参数被比较（604）至少一个预定极限。 该比较结果用于确定（606）是否调整（608）功率放大器的电源电压。 信号参数例如是平均功率或峰均功率比。
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公开(公告)号：WO2007089994A3
公开(公告)日：2008-04-10
申请号：PCT/US2007060734
申请日：2007-01-19
Applicant: MOTOROLA INC , MITZLAFF JAMES E , MATHES PATRICK C , HAGEN RODNEY
Inventor： MITZLAFF JAMES E , MATHES PATRICK C , HAGEN RODNEY
IPC: H03G3/20
CPC classification number: H04B1/0475 , H03F1/02 , H03F1/0227 , H03F1/3294 , H03F3/24 , H04B2001/045
Abstract: A supply voltage to a power amplifier is controlled. A signal at a single point in a power amplifier is detected (600). A signal parameter is determined (602) for the detected signal. The signal parameter is compared (604) to at least one predetermined limit. This comparison result is used to determine (606) whether to adjust (608) a supply voltage to the power amplifier. The signal parameter is, for example, an average power or a peak-to-average power ratio.
Abstract translation: 控制功率放大器的电源电压。 检测功率放大器中单个点处的信号（600）。 为检测到的信号确定（602）信号参数。 将信号参数与至少一个预定限制进行比较（604）。 该比较结果用于确定（606）是否调整（608）到功率放大器的电源电压。 信号参数例如是平均功率或峰均功率比。
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公开(公告)号：WO02058249A2
公开(公告)日：2002-07-25
申请号：PCT/US0149343
申请日：2001-12-18
Applicant: MOTOROLA INC
Inventor： MITZLAFF JAMES E
CPC classification number: H03F1/0211 , H03F1/0244 , H03F1/32
Abstract: An apparatus (150), system (100) and method (400-440) are illustrated for power amplification of an input signal to produce a substantially linear amplified output signal, for broadband wireless applications such as 3G cellular and broadband CDMA systems, without causing significant intermodulation distortion or spectral growth. The preferred system (100) embodiment includes an envelope detector (110) to determine an envelope detector voltage from the input signal; a tracking power supply (120) to determine a supply voltage, preferably as a substantially quantized replica of the envelope detector voltage; an input signal conditioner (150) to determine, in response to the supply voltage, a corresponding phase adjustment and a corresponding gain adjustment, and to modify the input signal using the corresponding phase adjustment and the corresponding gain adjustment to produce a conditioned input signal for power amplification. The preferred system (100) embodiment further includes a power amplifier which operates using the supply voltage, and which amplifies the conditioned input signal to produce the amplified output signal. In the preferred embodiment, the corresponding phase adjustment and a corresponding gain adjustment are separately and independently determined from piecewise linear mappings of a phase response and an amplitude response, respectively, of the power amplifier to a range of variation of the supply voltage.
Abstract translation: 示出了用于输入信号的功率放大的装置（150），系统（100）和方法（400-440），以产生用于诸如3G蜂窝和宽带CDMA系统之类的宽带无线应用的基本上线性的放大输出信号，而不引起 显着的互调失真或光谱增长。 优选的系统（100）实施例包括一个包络检测器（110），用于根据输入信号确定包络检测器电压; 跟踪电源（120），用于确定电源电压，优选地作为包络检测器电压的基本上量化的副本; 输入信号调节器（150），用于响应于电源电压确定相应的相位调整和相应的增益调整，并且使用相应的相位调整和相应的增益调整修改输入信号，以产生经调节的输入信号， 功率放大。 优选的系统（100）实施例还包括功率放大器，其使用电源电压进行操作，并且放大经调节的输入信号以产生放大的输出信号。 在优选实施例中，相应的相位调整和相应的增益调整是分别地和独立地确定的功率放大器的相位响应和振幅响应的分段线性映射到电源电压的变化范围。
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公开(公告)号：AU2002357027A1
公开(公告)日：2003-06-23
申请号：AU2002357027
申请日：2002-11-26
Applicant: MOTOROLA INC
Inventor： MITZLAFF JAMES E
IPC: H03F1/32
Abstract: A wideband linear amplification system amplifies an input signal to produce an amplified output signal. An envelope detector determines an envelope detector signal based on the input signal. An amplifier bias controller produces multiple control signals based on the envelope detector signal. A predistortion signal loop modifies the input signal, using a companion amplifier stage, based on a first control signal of the multiple control signals to produce a predistorted input signal that includes a distortion component introduced by the companion amplifier stage. A main amplifier stage amplifies the predistorted input signal to produce the amplified output signal based on a second control signal of the multiple control signals, wherein the distortion component of the predistorted input signal at least partially cancels a distortion component introduced to the amplified output signal by the main amplifier stage.
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5.发明专利
公开(公告)号：CA2203551A1
公开(公告)日：1997-04-24
申请号：CA2203551
申请日：1996-08-20
Applicant: MOTOROLA INC
Inventor： MITZLAFF JAMES E
IPC: H03F1/00
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Patent Agency Ranking
公开(公告)号：GB2271231B
公开(公告)日：1996-01-03
申请号：GB9322753
申请日：1992-04-08
Applicant: MOTOROLA INC
Inventor： MITZLAFF JAMES E
Abstract: Power control circuitry (100) uses two attenuators in the transmit path to achieve wide dynamic range. An intermediate frequency (IF) attenuator (200) is placed before a mixer (212) in the IF section of the transmit path and a radio frequency (RF) attenuator (221) is placed after the mixer (212) in the RF section of the transmit path. Power control circuitry (236) controls setting of the two attenuators in response to a magnitude control signal (102) related to a RF output signal at a desired power level. To conserve battery power of the subscriber unit, only the RF attenuator (221) is adjusted when the desired power level is to be within a given range below the maximum transmission level. For ranges below the given range, the RF attenuator (221) is set for maximum attenuation and the IF attenuator (200) is adjusted.
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公开(公告)号：CA2109810A1
公开(公告)日：1992-12-10
申请号：CA2109810
申请日：1992-04-08
Applicant: MOTOROLA INC
Inventor： MITZLAFF JAMES E
Abstract: Power control circuitry (100) uses two attenuators in the transmit path to achieve wide dynamic range. An intermediate frequency (IF) attenuator (200) is placed before a mixer (212) in the IF section of the transmit path and a radio frequency (RF) attenuator (221) is placed after the mixer (212) in the RF section of the transmit path. Power control circuitry (236) controls setting of the two attenuators in response to a magnitude control signal (102) related to a RF output signal at a desired power level. To conserve battery power of the subscriber unit, only the RF attenuator (221) is adjusted when the desired power level is to be within a given range below the maximum transmission level. For ranges below the given range, the RF attenuator (221) is set for maximum attenuation and the IF attenuator (200) is adjusted.
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公开(公告)号：HUT59782A
公开(公告)日：1992-06-29
申请号：HU768790
申请日：1990-11-29
Applicant: MOTOROLA INC
Inventor： BERKEN JAMES J , FREEBURG THOMAS A , OGASAWARA ROY T , WHITE RICHARD E , MITZLAFF JAMES E , BEDLEK GREGORY J
Abstract: A wireless in-building telecommunications system for voice and data communications is disclosed having at least one node (101) arranged for linking to the PSTN (151) and at least one digital information source (153, 155, 157, 159) multiplicity of user modules (103) (UM's) linked to the node via a shared RF communications path (107). Each UM is coupled to a voice telephone instrument (127) and to one or more data terminals (165). The UM's communicate with the node by exchanging fast packets via the common RF path (107). The node also includes a fast-packet-switched mechanism controlled by a bandwidth allocating scheme to prevent collisions of packets as they are transmitted between the various units (101, 103) (nodes and/or user modules) that may be accessing the RF path (107). Also disclosed is a method for allocating the required bandwidth to each of the users of the common communications path in a wireless in-building telephone system. The invention provides for the combination of both voice and data in a single switch using a common packet structure. It allows for the dynamic allocation of bandwidth based on system loading. This includes not only bandwidth within the voice or data areas of the frame, but also between the voice and data portions. It also synchronizes the transfer of the data and the allocation of bus bandwidth.
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公开(公告)号：CS591090A2
公开(公告)日：1991-10-15
申请号：CS591090
申请日：1990-11-28
Applicant: MOTOROLA INC
Inventor： BERKEN JAMES J , FREEBURG THOMAS A , OGASAWARA ROY T , WHITE RICHARD E , MITZLAFF JAMES E , BEDLEK GREGORY J
Abstract: A wireless in-building telecommunications system for voice and data communications is disclosed having at least one node (101) arranged for linking to the PSTN (151) and at least one digital information source (153, 155, 157, 159) multiplicity of user modules (103) (UM's) linked to the node via a shared RF communications path (107). Each UM is coupled to a voice telephone instrument (127) and to one or more data terminals (165). The UM's communicate with the node by exchanging fast packets via the common RF path (107). The node also includes a fast-packet-switched mechanism controlled by a bandwidth allocating scheme to prevent collisions of packets as they are transmitted between the various units (101, 103) (nodes and/or user modules) that may be accessing the RF path (107). Also disclosed is a method for allocating the required bandwidth to each of the users of the common communications path in a wireless in-building telephone system. The invention provides for the combination of both voice and data in a single switch using a common packet structure. It allows for the dynamic allocation of bandwidth based on system loading. This includes not only bandwidth within the voice or data areas of the frame, but also between the voice and data portions. It also synchronizes the transfer of the data and the allocation of bus bandwidth.
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10.发明专利
公开(公告)号：CA2459545C
公开(公告)日：2010-09-14
申请号：CA2459545
申请日：2003-07-07
Applicant: MOTOROLA INC
Inventor： MITZLAFF JAMES E
Abstract: An envelope tracking amplification system (200) that includes an envelope tracking power supply (ETPS) (208) amplifies a radio frequency (RF) signal (201) to produce a linearized amplified signal (213). The envelope tracking amplification system samples the RF signal to produce a sampled RF signal (205). The ETPS (208) produces a control signal based on an instantaneous magnitude of the sampled RF signal and further based on an average magnitude of the sampled RF signal, produces multiple supply voltages, and, based on the control signal, couples a supply voltage of the multiple supply voltages to an output of the EPTS to produce an output supply voltage (211). The envelope tracking amplification system then amplifies the RF signal based on the output supply voltage to produce the highly linear amplified signal (213).
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