公开(公告)号：EP2114008A1

公开(公告)日：2009-11-04

申请号：EP08155374.5

申请日：2008-04-29

Applicant: VLSI Solution Oy

Inventor： Hämäläinen, Ari ,  Ritoniemi, Tapani

IPC: H03F1/30 ,  H03F1/32 ,  H03F3/30

CPC classification number: H03F1/301 ,  H03F1/3205 ,  H03F3/3016

Abstract: The invention relates to a method for controlling an amplifier (10). The method comprises inputting an audio signal; and providing the audio signal to an amplifying element (31a, 31 b) of an output stage (30) of the amplifier (10). The amplifying element (31 a, 31 b) comprises a control input (32a, 32b). In the method the current flowing through the amplifying element (31 a, 31 b) is measured, a control signal is generated on the basis of the measurement; and the control signal is provided to the control input (32a, 32b) of the amplifying element (31 a, 31 b). The invention also relates to an amplifier (10) in which the method is implemented.

Abstract translation: 本发明涉及一种用于控制放大器（10）的方法。 该方法包括输入音频信号; 以及将音频信号提供给放大器（10）的输出级（30）的放大元件（31a，31b）。 放大元件（31a，31b）包括控制输入端（32a，32b）。 在该方法中，测量流过放大元件（31a，31b）的电流，基于测量产生控制信号; 并且控制信号被提供给放大元件（31a，31b）的控制输入端（32a，32b）。 本发明还涉及其中实现该方法的放大器（10）。

公开(公告)号：EP1363394B1

公开(公告)日：2009-09-09

申请号：EP02712298.5

申请日：2002-02-08

Applicant: Sony Corporation

Inventor： SHIMA, Takashi, c/o Sony Corporation

IPC: H03F3/217

CPC classification number: H03F3/217 ,  H03F1/3205 ,  H03F3/2173

Abstract: A reduction is made in signal distortion that occurs in an output signal of a PWM switching power amplifier due to noise disturbances from a switching power supply. In a switching power amplifier that has a switching power supply unit 11 as a power supply, a clock signal S18 for controlling the switching of the switching power supply unit 11 is generated based on a clock signal S6 that is used to synchronize switching operations. The clock signal S18 has a clock repeated period that is an integer multiple of a repeated period t of the clock signal S6 and matches a timing at which a signal level of a PWM power signal S4 that is generated by the switching power amplifier is at the ground level. The switching of the switching power supply unit 11 is synchronized using the clock signal S18.

公开(公告)号：EP2030238A1

公开(公告)日：2009-03-04

申请号：EP07729901.4

申请日：2007-06-05

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： ARNBORG, Torkel

IPC: H01L27/088

CPC classification number: H03F1/3205 ,  H01L21/823412 ,  H01L27/088 ,  H03F3/19 ,  H03F3/211 ,  H03F2200/451 ,  H03F2200/456 ,  H03F2200/492 ,  H03F2203/21178

Abstract: A method of implementing a transistor circuit comprises coupling first and second transistors in parallel, wherein the first transistor has a channel length corresponding to a peak in the transistor's voltage threshold curve arising from reverse short channel effects, and the second transistor has a longer channel length and, therefore, a lower threshold voltage. Exploiting reverse short channel effects in this manner enables the implementation of 'composite' transistor circuits that exhibit improved linearity.

公开(公告)号：EP1783896A3

公开(公告)日：2008-04-23

申请号：EP06123459.7

申请日：2006-11-03

Applicant: Samsung Electronics Co., Ltd.

Inventor： Lee, Jong-Sung

IPC: H03F1/30 ,  H03F1/32 ,  H03F3/24 ,  H03F3/189 ,  H03F1/02

CPC classification number: H03F1/0266 ,  H03F1/301 ,  H03F1/3205 ,  H03F3/189 ,  H03F3/24 ,  H03F2200/18 ,  H03F2200/192 ,  H03F2200/451 ,  H03F2200/471

Abstract: Disclosed is an apparatus for maintaining the linearity of a Radio Frequency amplifier that includes a coupler (203) for coupling a signal input to a power amplifier (201), a gate bias controller (205) for determining a gate bias voltage in accordance with the signal level, and a power amplifier (201) for amplifying the input signal with the input signal maintained using the gate bias voltage received from the gate bias controller (205), making possible improved linearity of power amplifier output in an entire output region and increased Inter Modulation Distortion (IMD) cancellation when a pre-distorter is used. Since the linearity characteristic of the power amplifier is optimized despite reduction in output signal level of the power amplifier, it is possible to use one power amplifier for a single Frequency Allocation (FA) condition of a high output and a multi FA condition of a low output.

公开(公告)号：EP1755215A3

公开(公告)日：2007-09-05

申请号：EP06017070.1

申请日：2006-08-16

Applicant: Integrant Technologies Inc.

Inventor： Kim, Tae Wook ,  Kim, Bonkee ,  Lee, Kwyro

IPC: H03F1/22 ,  H03F1/32 ,  H03F1/34

CPC classification number: H03F1/34 ,  H03F1/223 ,  H03F1/3205 ,  H03F2200/162 ,  H03F2200/36 ,  H03F2200/366 ,  H03F2200/432

Abstract: An amplifier circuit improved in linearity and frequency band comprises an amplification block (310), a feedback block and an output block. The amplification block (310) comprises a main transistor (MN31), an auxiliary transistor (MN32), a first capacitor (C31), a second capacitor (C32), a main transistor bias unit (321), and an auxiliary transistor bias unit (322). The main transistor bias unit (321) comprises a first bias resistor (Rb31). The auxiliary transistor bias unit (322) comprises a second bias resistor (Rb32). The feedback block (320) comprises first (R31) and second (R32) feedback resistors, and the output block (330) comprises an output resistor (Rout) and an output transistor (MNout).

Abstract translation: 线性和频带改进的放大器电路包括放大块（310），反馈块和输出块。 放大模块310包括主晶体管MN31，辅助晶体管MN32，第一电容器C31，第二电容器C32，主晶体管偏置单元321以及辅助晶体管偏置单元 （322）。 主晶体管偏置单元（321）包括第一偏置电阻器（Rb31）。 辅助晶体管偏置单元（322）包括第二偏置电阻器（Rb32）。 反馈块（320）包括第一（R31）和第二（R32）反馈电阻器，并且输出块（330）包括输出电阻器（Rout）和输出晶体管（MNout）。

公开(公告)号：EP1732209A1

公开(公告)日：2006-12-13

申请号：EP06010186.2

申请日：2006-05-17

Applicant: Emcore Corporation

Inventor： Kasper, Bryon Lynn ,  Peral, Eva Maria

IPC: H03F3/08 ,  H03F1/32 ,  H03F1/22 ,  H03F3/50 ,  H03F1/30

CPC classification number: H03F3/082 ,  H03F1/223 ,  H03F1/226 ,  H03F1/301 ,  H03F1/3205 ,  H03F1/3211 ,  H03F3/087 ,  H03F3/505

Abstract: An optical receiver for use in an optical communications system in which an analog signal is transmitted over an optical fiber including a housing with a photodetector (PD1) coupled to the external optical fiber for receiving an optical communications signal; and a transimpedance amplifier (FET1,FET2) coupled to the electrical output of the photodetector (PD1) and having a bias current in a second stage (FET3) set to a predetermined value that minimizes the distortion in the output signal created in a first amplification stage (FET1,FET2) by a cancellation effect.

Abstract translation: 一种用于光通信系统的光接收机，其中模拟信号通过光纤传输，所述光纤包括具有耦合到所述外部光纤的用于接收光通信信号的光电检测器（PD1）的外壳; 以及耦合到光电检测器（PD1）的电输出并且具有设定为预定值的第二级（FET3）中的偏置电流的跨阻抗放大器（FET1，FET2），其将在第一放大中产生的输出信号中的失真最小化 级（FET1，FET2）。

公开(公告)号：EP1578011A4

公开(公告)日：2006-03-15

申请号：EP03811495

申请日：2003-11-06

Applicant: MATSUSHITA ELECTRIC IND CO LTD

Inventor： ISHII TAKUYA ,  IKEDA MASAHARU ,  AKASHI HIROKI

IPC: H03F1/02 ,  H03F1/32 ,  H03F3/217

CPC classification number: H03F3/2173 ,  H03F1/0211 ,  H03F1/3205 ,  H03F2200/331

Abstract: A power amplifying apparatus of switching type for performing, with a high degree of efficiency, a power amplification of input AC signals, such as an acoustic signal and the like, has first (11) and second (12) switch circuits to which a power supply voltage (Vc) is supplied; an inductor (13) and a load (14) that are connected between those switch circuits; and a control circuit (15) that receives an input AC signal (Vi), sets a predetermined ratio of ON interval to OFF interval, and drives the switch circuits. The control circuit (15) includes a calculating circuit (20) that multiplies a modulation sensitivity (e.g., the amplitude of a triangular wave voltage during production of a pulse signal for driving the switch circuits) by a ratio of the power supply voltage (Vc) to a DC component (Ec) thereof (Vc/Ec), and then outputs the resultant amplified value. This configuration compensates for distortion due to a ripple variation of the power supply voltage caused by a regenerative power or the like, and allows an adjustment of amplification factor by use of the power supply voltage.

Abstract translation: 具有开关类型并且能够有效地放大诸如声信号的输入AC信号的功率的功率放大装置包括第一开关电路（11）和第二开关电路（12），电源电压 施加Vc，连接在开关电路之间的电感器（13）和负载（14）以及接收输入AC信号Vi的控制电路（15）设定预定比例的导通/截止周期，并驱动 开关电路。 控制电路（15）包括将调制灵敏度（例如，用于产生用于驱动开关电路的脉冲信号的三角波电压的振幅）乘以比率（Vc / Ec）的运算电路（20） 的电源电压Vc和DC分量Ec。 该配置可以补偿由于再生功率等导致的电源电压的纹波变化引起的失真，并且能够通过电源电压进行增益控制。

公开(公告)号：EP0926818A3

公开(公告)日：2004-06-16

申请号：EP98403000.7

申请日：1998-11-30

Applicant: Radio Frequency Systems Inc.

Inventor： Helms, David R.

IPC: H03F3/193 ,  H03F1/32

CPC classification number: H03F3/193 ,  H03F1/3205

Abstract: A new class A/F amplifier has an filtering and matching input circuit, a summing junction, an amplifying circuit, a filtering and feedback biasing circuit, and an output filtering and matching circuit. The filtering and matching input circuit responds to a radio frequency access input signal, for providing a filtered and matched radio frequency access input signal. The summing junction responds to the filtered and matched radio frequency access input signal, and further responds to a filtering and feedback biasing signal, for providing a summed, filtered, matched and feedback radio frequency access input signal. The amplifying circuit responds to the summed filtered, matched and feedback radio frequency access input signal, for providing an amplified, summed, filtered, matched and feedback radio frequency access input signal. The feedback and filtering biasing circuit responds to the amplified, summed, filtered, matched and feedback radio frequency access input signal, for providing the feedback and filtering biasing signal. The output filtering and matching circuit responds to the amplified, summed, filtered, matched and feedback radio frequency access input signal, for providing an amplified, summed, filtered, matched and feedback radio frequency access output signal. The class A/F amplifier substantially reduces harmonics in the radio frequency signal that cause power interference between adjacent channels, resulting in greatly improved mobile communication service having much fewer dropped calls and an enhanced calling range.

公开(公告)号：EP1362416A2

公开(公告)日：2003-11-19

申请号：EP01979626.7

申请日：2001-10-09

Applicant: Tropian, Inc.

Inventor： MCCUNE, Earl, W., Jr.

IPC: H03F1/00

CPC classification number: H03F3/217 ,  H03F1/0227 ,  H03F1/0261 ,  H03F1/3205 ,  H03F1/3223

Abstract: The present invention, generally speaking, provides for the effective use of dynamic bias control in a switch-mode RF amplifier to achieve an output signal having wide dynamic range. In one aspect, a method is provided of amplifying an RF signal to produce a variable output signal (Rfout) using an amplifier including a final amplification stage (Mfin) having a control terminal. The method includes: applying to the control terminal of the final amplification stage (Mfin) a drive signal and a bias signal (Vbiasfin); and varying the bias signal (Vbiasfin) as a function of a desired output power of the variable output signal (Rfout). The drive signal and the bias signal (Vbiasfin) together cause the final amplification stage (Mfin) to be driven repeatedly between two states, a hard-on state and a hard-off state, without operating in a linear operating region for an appreciable percentage of time, and the final amplification stage (Mfin) is controlled without continuous or frequent measurement and feedback adjustment of the variable output signal.

公开(公告)号：EP1253708A2

公开(公告)日：2002-10-30

申请号：EP02009591.5

申请日：2002-04-26

Applicant: Hitachi Kokusai Electric Inc.

Inventor： Okubo, Yoichi ,  Funada, Kiyoshi ,  Suto, Masaki ,  Horaguchi, Masato ,  Takada, Toshio ,  Hongo, Naoki

IPC: H03F1/32

CPC classification number: H03F1/3247 ,  H03F1/3205 ,  H03F1/3282 ,  H03F1/3288 ,  H03F2200/102 ,  H03F2201/3206 ,  H03F2201/3233

Abstract: There is provided a distortion canceling circuit for reducing an unbalance between a higher and a lower 3rd order distortion at frequencies of (2·f2-f1) and (2·f1-f2), respectively, the distortions being generated by an amplifier which amplifies an input signal having at least two frequency components, i.e., f1 and f2. Phase modulation control means supply a control signal, which has a difference frequency of (f2-f1), to phase modulation means, the control signal being generated based on the amplified input signal outputted from the amplifier. The phase modulation means performs phase modulation on the amplified input signal based on the supplied control signal to thereby generate a higher and a lower side-band signal having frequencies of (2·f2-f1) and (2·f1-f2), respectively, each of which has an identical amplitude and a phase difference of 180° with respect to each other. The distortion canceling circuit reduces the unbalance by using the side-band signals.

Abstract translation: 提供一种失真消除电路，用于分别在（2·f2-f1）和（2·f1-f2）的频率下减少高3位和3位以下失真的失衡，失真是由放大器 具有至少两个频率分量的输入信号，即f1和f2。 相位调制控制装置将具有差分频率（f2-f1）的控制信号提供给相位调制装置，该控制信号是根据从放大器输出的放大的输入信号产生的。 相位调制装置基于所提供的控制信号对放大的输入信号进行相位调制，从而分别产生频率为（2·f2-f1）和（2·f1-f2）的较高和较低的边带信号 各自具有彼此相同的幅度和相位差180°的相位差。 失真消除电路通过使用边带信号来减少不平衡。