公开(公告)号：US06431557B1

公开(公告)日：2002-08-13

申请号：US09341828

申请日：1999-07-19

申请人： Bengt Terborn ,  Per-Olof Brandt

发明人： Bengt Terborn ,  Per-Olof Brandt

IPC分类号： B60G1701

CPC分类号： B60G9/02 ,  B60G11/465 ,  B60G17/0521 ,  B60G17/0523 ,  B60G2202/412 ,  B60G2204/126 ,  B60G2206/424 ,  B60G2300/024 ,  B60G2500/30 ,  B60G2600/20 ,  B60G2800/204

摘要： Apparatus for adjusting the height of a vehicle frame on a vehicle is disclosed including a pneumatic suspension system for adjusting the elevation of the vehicle frame, and a controller for controlling the pneumatic suspension system, the controller being adapted to be set in a first mode corresponding to normal driving of the vehicle and a second mode corresponding to parking or marshalling of the vehicle, whereby when the controller is in the first mode, the pneumatic suspension system permits adjustment of the vehicle frame within a first range and when the controller is in the second mode the pneumatic suspension system permits adjustment of the vehicle frame within the second range, the first range being greater than the second range, and the second range being within the first range.

摘要翻译： 公开了一种用于调整车辆的车架高度的装置，包括用于调节车架高度的气动悬挂系统和用于控制气动悬挂系统的控制器，所述控制器适于被设置为第一模式对应 车辆的正常驾驶和对应于车辆的停车或编组的第二模式，由此当控制器处于第一模式时，气动悬挂系统允许在第一范围内调整车架，并且当控制器处于 第二模式，气动悬挂系统允许在第二范围内调整车架，第一范围大于第二范围，第二范围在第一范围内。

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。

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.

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。

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。

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）。

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。

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.

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。

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。