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    • 2. 发明申请
    • DIFFERENTIAL VOLTAGE-TO-CURRENT CONVERTER
    • 差分电压到电流转换器
    • WO1999022445A1
    • 1999-05-06
    • PCT/IT1997000260
    • 1997-10-23
    • TELEFONAKTIEBOLAGET LM ERICSSONSTOCHINO, Giovanni
    • TELEFONAKTIEBOLAGET LM ERICSSON
    • H03F03/45
    • H03F3/4508G05F1/561H03F3/26H03F3/45071H03F2203/45031H03F2203/45188H03F2203/45471
    • In a wide dynamic range and with constant transconductance (Gm) differential voltage-to-current converter, operating in class AB, essentially comprising two complementary pairs of transistors, respectively of pnp (Q1, Q2) and npn (Q3, Q4) type, and two nominally equal resistors (RE1 and RE2), the emitters of the first pair transistors (Q1, Q2) are connected to the respective ones of the second pair transistors (Q3, Q4) through the two resistors (RE) having equal nominal resistance; a junction is provided between the emiters of the second pair transistors (Q3, Q4); and input voltages (V1 and V2) are respectively applied to the bases of first pair transistors (Q1, Q2), from collectors of which transistor output currents (I1, I2) are taken. Preferably, in this differential voltage-to-current converter, biasing and thermal balancing circuits (VP1, VP2) are connected to the first (Q1, Q3) and, respectively, to the second (Q2, Q4) transistors of said two pairs of transistors.
    • 在宽动态范围内并且具有恒定跨导(Gm)差分电压 - 电流转换器,在AB类中工作,主要包括pnp(Q1,Q2)和npn(Q3,Q4)类型的两对互补晶体管对, 和两个名义上相等的电阻(RE1和RE2),第一对晶体管(Q1,Q2)的发射极通过具有相等标称电阻的两个电阻(RE)连接到第二对晶体管(Q3,Q4)中的相应晶体管 ; 在第二对晶体管(Q3,Q4)的发射极之间提供结点; 并且从其晶体管输出电流(I1,I2)的集电极分别将第一对晶体管(Q1,Q2)的基极施加输入电压(V1和V2)。 优选地,在该差分电压 - 电流转换器中,偏置和热平衡电路(VP1,VP2)分别连接到所述两对的第一(Q1,Q3)和第二(Q2,Q4)晶体管 晶体管。
    • 3. 发明申请
    • ELECTRONICS UNIT FOR WIRELESS TRANSFER OF SIGNALS
    • 电子单位无线信号转移
    • WO1998029920A1
    • 1998-07-09
    • PCT/SE1997002218
    • 1997-12-30
    • TELEFONAKTIEBOLAGET LM ERICSSON
    • TELEFONAKTIEBOLAGET LM ERICSSONJOHANNISSON, BjörnHÖGBERG, Mats
    • H01Q01/38
    • H01Q21/205H01Q1/38H01Q9/0471H01Q23/00
    • Electronics unit for wireless transfer of signals, comprising an antenna part (2), an electronics part (1), and a transmission circuit part (3). The electronics part (1) is placed on a laminate with at least one substrate layer of a dielectric material. The substrate layer (20) is made of a flexible material, and forms a continuous unit, comprising a first part (22) which supports the electronics part (1), a second part (23) which supports the antenna part (2), and a third part (20) which supports the transmission circuit part. The second part of the substrate (23) is formed to shape a convex surface, which supports groups of at least one antenna element (5-10). Since the surface is curved, the groups cover different directions.
    • 用于无线传输信号的电子单元,包括天线部分(2),电子部件(1)和传输电路部分(3)。 将电子部件(1)放置在具有介电材料的至少一个基底层的层压体上。 衬底层(20)由柔性材料制成,并形成连续单元,包括支撑电子部件(1)的第一部分(22),支撑天线部分(2)的第二部分(23) 以及支持所述传输电路部分的第三部分(20)。 基板(23)的第二部分形成为形成支撑至少一个天线元件(5-10)的凸起表面。 由于表面是弯曲的,这些组覆盖不同的方向。
    • 5. 发明申请
    • TRANSCEIVER HOPPING
    • 收货人希望
    • WO1998027762A2
    • 1998-06-25
    • PCT/SE1997002118
    • 1997-12-16
    • TELEFONAKTIEBOLAGET LM ERICSSON
    • TELEFONAKTIEBOLAGET LM ERICSSONSVENSSON, HåkanALLINGER, Lennart
    • H04Q07/22
    • H04W76/10H04W88/08
    • A method and apparatus for providing support for voice communications and data communications at a base station which has a plurality of transceivers, each having a voice mode of operation and a data mode of operation, is disclosed. A first voice call is assigned to a first transceiver, wherein the mode of the transceiver is set to the voice mode of operation. A data transmission is assigned to a second available transceiver, wherein the mode of the transceiver is set to the data mode of operation. The data transmission is halted when a second voice call needs to be handled by the second transceiver. The mode of operation of the second transceiver is changed from the data mode to the voice mode and the second call is initiated. The data transmission is then assigned to the next available transceiver as long as a voice call does not need to be carried, wherein the mode of the transceiver is set to the data mode of operation.
    • 公开了一种用于在具有多个收发器的基站处提供语音通信和数据通信支持的方法和装置,每个收发器具有语音操作模式和数据操作模式。 第一语音呼叫被分配给第一收发器,其中收发器的模式被设置为语音操作模式。 将数据传输分配给​​第二可用收发器,其中收发器的模式被设置为数据操作模式。 当需要由第二收发器处理第二语音呼叫时,数据传输被停止。 第二收发器的操作模式从数据模式改变到语音模式,并且启动第二个呼叫。 只要不需要携带语音呼叫,则将数据传输分配给​​下一个可用收发器,其中收发器的模式被设置为数据操作模式。
    • 10. 发明申请
    • ECHO CANCELLER WITH SILENCE DETECTION
    • ECHO CANCELLER与沉默检测
    • WO1998015068A1
    • 1998-04-09
    • PCT/SE1997001639
    • 1997-09-29
    • TELEFONAKTIEBOLAGET LM ERICSSON
    • TELEFONAKTIEBOLAGET LM ERICSSONEL MALKI, Karim
    • H04B03/23
    • H04B3/234
    • An echo cancellation method and apparatus (20) determines whether a window W(m) of samples on an incoming communications path (30) contains silence, the window W(m) including the sample obtained at time t(m) and prior samples. If the window W(m) contains silence, coefficients of an adaptive filter (52) of the echo canceller (20) are set to silence detection values prior to receipt of a sample at time t(m+1). If the window W(m) does not contain silence and there is no double-talk, the sample obtained at time t(m) is used to update coefficients of the adaptive filter; the adaptive filter as updated generates an echo estimate after a sample is obtained at time t(m+1); and, the echo estimate is used to modify a signal on an outgoing communications path (32).
    • 回波消除方法和装置(20)确定进入通信路径(30)上的样本的窗口W(m)是否包含静默,包括在时间t(m)和先前样本获得的样本的窗口W(m)。 如果窗口W(m)包含静音,则回波消除器(20)的自适应滤波器(52)的系数被设置为在时间t(m + 1)接收样本之前使静音检测值无效。 如果窗口W(m)不包含静音并且没有双方通话,则使用在时间t(m)获得的样本来更新自适应滤波器的系数; 在时间t(m + 1)获得样本之后,更新的自适应滤波器产生回波估计; 并且使用回波估计来修改输出通信路径(32)上的信号。