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1. 发明申请

US20060139092A1 Load mismatch adaptation in coupler-based amplifiers 有权
标题翻译：基于耦合器的放大器的负载不匹配适配
公开(公告)号：US20060139092A1
公开(公告)日：2006-06-29
申请号：US11025497
申请日：2004-12-29
申请人： Lars Sundstrom , Per-Olof Brandt
发明人： Lars Sundstrom , Per-Olof Brandt
IPC分类号： H03F3/68
CPC分类号： H03F1/0238 , H03F1/32 , H03F3/191 , H03F3/602 , H03F2200/192 , H03F2200/198 , H03F2200/204
摘要： Coupler-based amplifiers provide a measure of load mismatch based on the difference between the two output signal amplitudes from the amplifiers. This measure can be used to control variable matching networks (VMNs) or amplifier supply voltages to maintain constant distortion levels and high power transfer/efficiency and even to control output power. Load mismatch is measured by comparing the amplifier device output amplitudes and adjusting the circuit based on the comparison to counteract undesired behavior, such as increasing distortion levels.
摘要翻译：基于耦合器的放大器基于来自放大器的两个输出信号幅度之间的差异来提供负载失配的量度。该措施可用于控制可变匹配网络（VMN）或放大器电源电压，以保持恒定的失真水平和高功率传输/效率，甚至控制输出功率。通过比较放大器器件输出幅度并根据比较调整电路以抵消不期望的行为（例如增加失真电平）来测量负载失配。

2. 发明授权

US07944294B2 Signal amplification 有权
标题翻译：信号放大
公开(公告)号：US07944294B2
公开(公告)日：2011-05-17
申请号：US12147845
申请日：2008-06-27
申请人： Steven Robert Jones , Per-Olof Brandt
发明人： Steven Robert Jones , Per-Olof Brandt
IPC分类号： H03G3/20
CPC分类号： H03G3/004 , H03F1/0233 , H03F1/32 , H03F3/24 , H03F2200/336 , H03F2200/504 , H03G3/3042
摘要： An apparatus for amplifying a signal. The apparatus includes an amplifier powered by a power supply, a monitor that monitors an output signal of the amplifier and a controller operative to adjust the power supply if distortion is detected in the output signal of the amplifier by the monitor.
摘要翻译：一种放大信号的装置。该装置包括由电源供电的放大器，监视放大器的输出信号的监视器和如果在监视器的放大器的输出信号中检测到失真的情况下可操作的调节器的控制器。

3. 发明授权

US07138861B2 Load mismatch adaptation in coupler-based amplifiers 有权
公开(公告)号：US07138861B2
公开(公告)日：2006-11-21
申请号：US11025497
申请日：2004-12-29
申请人： Lars Sundström , Per-Olof Brandt
发明人： Lars Sundström , Per-Olof Brandt
IPC分类号： H03F3/68
CPC分类号： H03F1/0238 , H03F1/32 , H03F3/191 , H03F3/602 , H03F2200/192 , H03F2200/198 , H03F2200/204
摘要： Coupler-based amplifiers provide a measure of load mismatch based on the difference between the two output signal amplitudes from the amplifiers. This measure can be used to control variable matching networks (VMNs) or amplifier supply voltages to maintain constant distortion levels and high power transfer/efficiency and even to control output power. Load mismatch is measured by comparing the amplifier device output amplitudes and adjusting the circuit based on the comparison to counteract undesired behavior, such as increasing distortion levels.

4. 发明授权

US06534961B2 Compact DC/DC converter circuit 有权
标题翻译：紧凑型DC / DC转换器电路
公开(公告)号：US06534961B2
公开(公告)日：2003-03-18
申请号：US09858561
申请日：2001-05-17
申请人： Per-Olof Brandt
发明人： Per-Olof Brandt
IPC分类号： G05F140
CPC分类号： H02J7/0065 , H02M3/155 , H02M2001/0093
摘要： A DC/DC converter circuit includes an input capacitor, an inductor, a diode, a transistor, and a control circuit. The control circuit operates to control the transistor. An output capacitor is connected between the output and the input of the circuit. Connection in this way reduces the amount of energy passing through the output capacitor, which usefully reduces the size of the output capacitor.
摘要翻译： DC / DC转换器电路包括输入电容器，电感器，二极管，晶体管和控制电路。控制电路用于控制晶体管。输出电容器连接在电路的输出端和输入端之间。以这种方式连接减少了通过输出电容器的能量的量，这有效地减小了输出电容器的尺寸。

5. 发明授权

US06424212B1 Power amplifiers 有权
标题翻译：功率放大器
公开(公告)号：US06424212B1
公开(公告)日：2002-07-23
申请号：US09716610
申请日：2000-11-20
申请人： Per-Olof Brandt
发明人： Per-Olof Brandt
IPC分类号： H03G320
CPC分类号： H03F1/3282
摘要： A circuit for controlling the characteristics of a power amplifier including first and second inputs, a first amplitude detection circuit for producing a first output signal indicative of the amplitude of an input signal received from the first input, and a second amplitude detection circuit for producing a second output signal indicative of the amplitude of an input signal received from the second input. The circuit also includes a phase detection circuit for producing a phase signal indicative of the relative phase between the input signals supplied to the first and second inputs, an amplitude control circuit for receiving the outputs of the first and second amplitude detection circuits and producing an amplitude control signal therefrom, and a phase control circuit for receiving the output of the phase detection circuit and producing a phase control signal therefrom.
摘要翻译：一种用于控制包括第一和第二输入的功率放大器的特性的电路，用于产生指示从第一输入接收的输入信号的幅度的第一输出信号的第一幅度检测电路和用于产生第一输入信号的第二幅度检测电路指示从第二输入接收的输入信号的幅度的第二输出信号。电路还包括相位检测电路，用于产生指示提供给第一和第二输入的输入信号之间的相对相位的相位信号;振幅控制电路，用于接收第一和第二振幅检测电路的输出并产生振幅控制信号，以及用于接收相位检测电路的输出并从其产生相位控制信号的相位控制电路。

6. 发明申请

US20090322422A1 SIGNAL AMPLIFICATION 有权
标题翻译：信号放大
公开(公告)号：US20090322422A1
公开(公告)日：2009-12-31
申请号：US12147845
申请日：2008-06-27
申请人： Steven Robert Jones , Per-Olof Brandt
发明人： Steven Robert Jones , Per-Olof Brandt
IPC分类号： H03G3/20
CPC分类号： H03G3/004 , H03F1/0233 , H03F1/32 , H03F3/24 , H03F2200/336 , H03F2200/504 , H03G3/3042
摘要： Apparatus for amplifying a signal, the apparatus comprising an amplifier (12) powered by a power supply (14), a monitor (20) for monitoring an output signal of the amplifier (12) and a controller (22) operative to adjust the power supply (14) if distortion is detected in the output signal of the amplifier (12) by the monitor (20).
摘要翻译：用于放大信号的装置，该装置包括由电源（14）供电的放大器（12），用于监视放大器（12）的输出信号的监视器（20）和用于调节功率的控制器（22）如果由监视器（20）在放大器（12）的输出信号中检测到失真，则供给（14）。

7. 发明授权

US07330072B2 Circuit for power amplification 有权
标题翻译：功率放大电路
公开(公告)号：US07330072B2
公开(公告)日：2008-02-12
申请号：US10522913
申请日：2003-07-21
申请人： Per-Olof Brandt
发明人： Per-Olof Brandt
IPC分类号： H03Q5/16
CPC分类号： H03F1/0261 , H03F1/0272 , H03F1/52 , H03F3/19 , H03F2200/102 , H03F2200/451 , H03F2200/99 , H03G3/3042
摘要： A radio frequency (RF) power amplifier, including an external control loop and a protection circuit, which functions to maintain a constant output power during variations in impedance on the RF load. In the external control loop a collector current from an output transistor is detected and then regulated with respect to a reference current. The regulated signal is utilised to generate a bias control signal which is input to the base electrode of both a driver transistor and the output transistor. The protection circuit detects a voltage envelope at the collector electrode of the output transistor and utilises this signal to form a bias reduction signal which is input to the base electrode of the driver transistor.
摘要翻译：射频（RF）功率放大器，包括外部控制回路和保护电路，其功能是在RF负载的阻抗变化期间维持恒定的输出功率。在外部控制环路中，检测来自输出晶体管的集电极电流，然后相对于参考电流进行调节。调节信号用于产生输入到驱动晶体管和输出晶体管的基极的偏置控制信号。保护电路检测输出晶体管的集电极上的电压包络线，利用该信号形成偏置降低信号，该信号被输入到驱动晶体管的基极。

8. 发明授权

US07062237B2 Power amplifier (PA) with improved power regulation 有权
公开(公告)号：US07062237B2
公开(公告)日：2006-06-13
申请号：US09874130
申请日：2001-06-05
申请人： Per-Olof Brandt
发明人： Per-Olof Brandt
IPC分类号： H04B1/04
CPC分类号： H03G3/3042
摘要： A circuit for regulating the power provided to a load connected to an output of a power amplifier. The circuit includes an amplitude detector that outputs a voltage corresponding to the amplitude of the signal outputted by the power amplifier. This output voltage is a function of the impedance of the load. Thus, when the impedance of the load changes, the output voltage also changes. Given a constant current into the load, it is the load impedance that determines the power delivered to the load. Therefore, because the output voltage reflects changes in the impedance of the load, the output voltage can be used by a regulator circuit to maintain a constant output power, regardless of changes in the impedance of the load.

9. 发明申请

US20060071711A1 Arbitrary waveform predistortion table generation 有权
标题翻译：任意波形预失真表生成
公开(公告)号：US20060071711A1
公开(公告)日：2006-04-06
申请号：US11168404
申请日：2005-06-29
申请人： Jonas Persson , Per-Olof Brandt
发明人： Jonas Persson , Per-Olof Brandt
IPC分类号： H03F1/26
CPC分类号： H03F1/3288 , H03F1/0211 , H03F1/3247 , H03F2201/3233
摘要： Predistortion that will compensate for distortion introduced by a power amplifier circuit is determined by applying a time-varying reference signal to the power amplifier circuit, wherein at each moment the time-varying reference signal has a reference amplitude and a reference phase. A corresponding output signal supplied by the power amplifier circuit is measured, wherein at each moment the output signal has a measured amplitude and a measured phase. Amplitude predistortion is determined by comparing the reference amplitude with the measured amplitude, and phase predistortion is determined by comparing the reference phase with the measured phase. A relationship between the phase predistortion and the reference amplitude is determined such that, for any value of the reference amplitude, a corresponding value of the phase predistortion is identified.
摘要翻译：通过对功率放大器电路应用时变参考信号来确定补偿由功率放大器电路引入的失真的预失真，其中在每一时刻，时变参考信号具有参考幅度和参考相位。测量由功率放大器电路提供的对应的输出信号，其中在每个时刻，输出信号具有测量的幅度和测量的相位。通过将参考幅度与测量幅度进行比较来确定幅度预失真，并通过将参考相位与测量相位进行比较来确定相位预失真。确定相位预失真与参考幅度之间的关系，使得对于参考幅度的任何值，识别相位预失真的对应值。

10. 发明申请

US20050212601A1 Power amplifiers 有权
标题翻译：功率放大器
公开(公告)号：US20050212601A1
公开(公告)日：2005-09-29
申请号：US10515616
申请日：2003-05-19
申请人： Per-Olof Brandt
发明人： Per-Olof Brandt
IPC分类号： H03F3/20 , H02H1/00 , H03F1/02 , H03G3/10 , H03G3/30
CPC分类号： H03F1/0266 , H03F1/0233 , H03F1/0261 , H03F1/0272 , H03F2200/504 , H03G3/3042
摘要： A method of controlling output power in a power amplifier having a driver stage and an output stage. The driver current is measured and the output stage biased in dependence upon the measured driver current.
摘要翻译：一种在具有驱动级和输出级的功率放大器中控制输出功率的方法。测量驱动器电流，并根据测得的驱动器电流对输出级进行偏置。

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