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    • 2. 发明申请
    • 電力増幅回路及び通信機器
    • 功率放大器电路和通讯设备
    • WO2011077615A1
    • 2011-06-30
    • PCT/JP2010/006031
    • 2010-10-08
    • パナソニック株式会社森本 滋森 健一小島 巌高橋 一彰嶋田 幹大
    • 森本 滋森 健一小島 巌高橋 一彰嶋田 幹大
    • H03F3/24H03F1/30H04B1/04
    • H03F1/0261H03F3/245H03F2200/408H03F2200/462H03F2200/465H03F2200/481H03F2200/516H03G3/004
    •  アンテナ負荷が変動したときに、高速かつ高精度に電力増幅器の出力電力及び電流の変動を防止する電力増幅回路を提供する。電力増幅器11は、高周波信号を増幅し、出力信号を得る。レギュレータ12は、入力電圧を所定の利得で増幅し、電力増幅器11に出力電圧を供給する。電流モニタ13は、レギュレータ12への入力電流をモニタし、モニタ電流を得る。第1の乗算器14は、モニタ電流の情報と、レギュレータ12の出力電圧の情報とを乗算し、モニタ電力の情報を得る。メモリ16は、所定の基準電流の情報を予め記憶する。第2の乗算器15は、入力電圧の情報と基準電流の情報とを乗算し、基準電力の情報を得る。レギュレータ12は、モニタ電力の情報と、基準電力の情報とに基づいて、所定の利得を制御する利得制御部121を構成に備える。
    • 公开了一种功率放大器电路,其在天线负载波动时以高速和高精度消除功率放大器的输出功率和电流的波动。 功率放大器(11)放大高频信号并获得输出信号。 调节器(12)以预定的增益放大输入电压,并向功率放大器(11)提供输出电压。 电流监视器(13)监视到调节器(12)的输入电流,并获得监视电流。 第一乘法器(14)将监视电流的信息乘以调节器(12)的输出电压的信息,并获得监视功率的信息。 存储器(16)预先存储预定参考电流的信息。 第二乘法器(15)将输入电压的信息乘以参考电流的信息,并获得参考功率的信息。 调节器(12)设置有增益控制单元(121),该增益控制单元基于监视功率的信息和参考功率的信息来控制预定的增益。
    • 3. 发明申请
    • A CIRCUIT FOR USE WITH A LOUDSPEAKER FOR PORTABLE EQUIPMENTS
    • 与便携式设备的扬声器一起使用的电路
    • WO2013127620A1
    • 2013-09-06
    • PCT/EP2013/052707
    • 2013-02-11
    • ST-ERICSSON SA
    • PERNICI, SergioNICOLLINI, Germano
    • H04R3/00H03F3/45
    • H04R3/00H03F3/1855H03F3/45183H03F3/45511H03F2200/03H03F2200/481H03F2203/45374H03F2203/45418H04R3/002
    • The invention relates to a circuit (100) for use with a loudspeaker (104) having a first differential input terminal (t1) and a second differential input terminal (t2), the circuit (100) comprising: a differential power amplifier (103) having a first differential output terminal (t3) operatively connected to the first differential input terminal (t1) of the loudspeaker (104) and a second differential output terminal (t4) operatively connected to the second differential input terminal (t2) of the loudspeaker (104); - a first resistor (RS1) disposed between the first differential output terminal (t3) of the differential power amplifier (103) and the first differential input terminal (t1) of the loudspeaker (104); a second resistor (RS2) disposed between the second differential output terminal (t4) of the differential power amplifier (103) and the second differential input terminal (t2) of the loudspeaker (104). The circuit (100) further comprises: a first resistive module (RR1, RR2) arranged to generate on a respective output terminal (t5) a first control voltage (VIN), the first resistive module (RR1, RR2) having a first input terminal (t6) connected to the first differential output terminal (t3) of the power amplifier (103) and a second input terminal (t7) connected to the second differential input terminal (t2) of the loudspeaker (104), a second resistive module (RR3, RR4) arranged to generate on a respective output terminal (t8) a second control voltage (VIP), the second resistive module (RR3, RR4) having a first input terminal (t9) connected to the second differential output terminal (t4) of the power amplifier (103) and a second input terminal (t10) connected to the first differential input terminal (t1) of the loudspeaker (104). The loudspeaker circuit (100) being arranged to control the differential power amplifier (103) on the basis of the first control voltage (VIN) and the second control voltage (VIP).
    • 本发明涉及一种与具有第一差分输入端(t1)和第二差分输入端(t2)的扬声器(104)一起使用的电路(100),该电路(100)包括:差分功率放大器(103) 具有可操作地连接到扬声器(104)的第一差分输入端(t1)的第一差分输出端(t3)和可操作地连接到扬声器的第二差分输入端(t2)的第二差分输出端(t4) 104); - 设置在差分功率放大器(103)的第一差分输出端(t3)和扬声器(104)的第一差分输入端(t1)之间的第一电阻(RS1); 设置在差分功率放大器(103)的第二差分输出端子(t4)和扬声器(104)的第二差分输入端子(t2)之间的第二电阻器(RS2)。 电路(100)还包括:第一电阻模块(RR1,RR2),被布置为在相应的输出端子(t5)上产生第一控制电压(VIN),所述第一电阻模块(RR1,RR2)具有第一输入端 (t6)连接到功率放大器(103)的第一差分输出端(t3)和连接到扬声器(104)的第二差分输入端(t2)的第二输入端(t7),第二电阻模块 RR4,RR4),其被配置为在相应的输出端子(t8)上产生第二控制电压(VIP),所述第二电阻模块(RR3,RR4)具有连接到第二差分输出端子(t4)的第一输入端子(t9) 和连接到扬声器(104)的第一差分输入端子(t1)的第二输入端子(t10)。 扬声器电路(100)被布置成基于第一控制电压(VIN)和第二控制电压(VIP)来控制差分功率放大器(103)。
    • 5. 发明申请
    • AMPLIFIER BIAS CONTROL CIRCUIT
    • 放大器偏置控制电路
    • WO2002087075A1
    • 2002-10-31
    • PCT/US2002/012406
    • 2002-04-18
    • XICOR, INC.WOJSLAW, Charles
    • WOJSLAW, Charles
    • H03F3/04
    • H03F1/0272H03F2200/481H03G3/001H03G3/3047
    • Methods and apparatus for adjusting DC bias of a radio frequency (RF) amplifier for changing operating conditions such as multiple modulation techniques when no RF is present. A digitally controlled voltage source is programmed to maintain the amplifier bias. The voltage source can be a digitally controlled potentiometer (500). The amplifier's DC output current can be converted to a voltage and compared to a programmable reference representative of the optimal amplifier bias. The comparator (400) output determines a direction to drive the voltage source. A digital clock (410) is enabled to drive the voltage source when no RF is present. Alternatively, the amplifier's output current can be read by a processor that determines the optimal bias. The bias can be written to a data register that sets the voltage on the voltage source. The system automatically compensates for changes in the amplifier's optimal bias due to aging, temperature, and modulation scheme.
    • 用于调整射频(RF)放大器的直流偏置的方法和装置,用于在不存在RF时改变诸如多调制技术之类的工作条件。 数字控制的电压源被编程为保持放大器偏置。 电压源可以是数字控制电位器(500)。 放大器的直流输出电流可以转换为电压,并与代表最佳放大器偏置的可编程参考相比较。 比较器(400)输出确定驱动电压源的方向。 当不存在RF时,数字时钟(410)能够驱动电压源。 或者,放大器的输出电流可以由确定最佳偏置的处理器读取。 该偏置可以写入一个数据寄存器,用于设置电压源上的电压。 系统自动补偿由于老化,温度和调制方案导致的放大器最佳偏置的变化。
    • 8. 发明申请
    • TEMPERATURE-COMPENSATED BIAS CIRCUIT FOR POWER AMPLIFIER
    • 用于功率放大器的温度补偿偏置电路
    • WO2006041235A1
    • 2006-04-20
    • PCT/KR2004/003147
    • 2004-12-02
    • WAVICS LTD
    • JEON, Moon, SeokJUNG, Sang, HwaKIM, Jung, Hyun
    • H03F1/30
    • G05F3/225H03F1/302H03F2200/447H03F2200/481
    • Provided is a temperature-compensated bias circuit for a power amplifier, in which a first resistor (Rref) connected to a reference voltage is connected to a base terminal of a third transistor (Q3) and an emitter terminal of the third transistor is connected to a first diode (D1). The temperature-compensated bias circuit includes a second resistor (R1) connected to the reference voltage, a third resistor (R2) connected to the second resistor in series, a fourth resistor (Rc) having one terminal connected to the reference voltage, a fifth resistor (Re) having one terminal connected to ground, a bias transistor (Q4) having a base terminal connected to a contact point (Vs) between the second resistor and the third resistor, a collector terminal connected to the other terminal of the fourth resistor, and an emitter terminal connected to the other terminal of the fifth resistor, and a sixth resistor (RD connected between a collector terminal of the third transistor and a collector terminal of the bias transistor.
    • 提供一种用于功率放大器的温度补偿偏置电路,其中连接到参考电压的第一电阻器(Rref)连接到第三晶体管(Q3)的基极端子,并且第三晶体管的发射极端子连接到 第一二极管(D1)。 温度补偿偏置电路包括连接到参考电压的第二电阻器(R1),串联连接到第二电阻器的第三电阻器(R2),具有连接到参考电压的一个端子的第四电阻器(Rc),第五电阻器 电阻器(Re),其一端连接到地,偏置晶体管(Q4),其基极端子连接到第二电阻器和第三电阻器之间的接触点(Vs);集电极端子,连接到第四电阻器的另一端子 和连接到第五电阻器的另一个端子的发射极端子,以及连接在第三晶体管的集电极端子和偏置晶体管的集电极端子之间的第六电阻器(RD)。
    • 9. 发明申请
    • SYSTEM AND METHOD FOR AUTO-BIAS OF AN AMPLIFIER
    • 用于放大器自动偏置的系统和方法
    • WO02011279A2
    • 2002-02-07
    • PCT/IB2001/001265
    • 2001-07-16
    • H03F1/02H03F1/30H03F1/00
    • H03F1/0261H03F1/306H03F2200/481H03F2200/483H03F2200/504
    • The present invention provides a method and apparatus for auto-biasing an amplifier (310). The auto-bias system of the present invention has an auto-bias feedback loop (314) that adjusts the bias condition of an amplifier to a wanted state between transmission periods. The system monitors a physical quantity indicative of the operating state of the amplifier and controls the amplifier bias so as to control the amplifier operating point sufficiently to compensate for variations in amplifier electrical characteristics, amplifier load, amplifier temperature, and input signals. The system further adjusts the amplifier operating point based on the modulation scheme used to modulate information included in an input signal provided to amplifier, thereby allowing the amplifier to operate in any one of multiple signal modulation systems.
    • 本发明提供了一种用于自动偏置放大器(310)的方法和装置。 本发明的自动偏置系统具有自动偏置反馈环路(314),其将放大器的偏置状态调整到传输周期之间的期望状态。 系统监视指示放大器工作状态的物理量,并控制放大器偏置,以充分控制放大器工作点,以补偿放大器电气特性,放大器负载,放大器温度和输入信号的变化。 该系统基于用于调制提供给放大器的输入信号中包含的信息的调制方式进一步调节放大器工作点,从而允许放大器在多个信号调制系统中的任何一个中工作。