公开(公告)号：US20030216128A1

公开(公告)日：2003-11-20

申请号：US10147699

申请日：2002-05-16

申请人： G-PLUS, INC.

发明人： Sining Zhou

IPC分类号： H04B001/38

CPC分类号： H03D7/1441 ,  H03D7/1466 ,  H03D7/1491 ,  H03D2200/0047 ,  H04B1/30

摘要： An apparatus and method for tracking a DC offset in a mixer circuit used in wireless communication systems and for providing local oscillator DC bias level-shifting to reduce even order distortion resulting from the DC offset is described. The apparatus has an input coupled to a mixer circuit output for receiving a DC voltage present on the mixer circuit output. The DC voltage includes an offset component. A level shifting circuit is coupled to the input for level shifting the received DC voltage a predetermined amount. An output of the level shifting circuit is coupled to a local oscillator input for outputting the level shifted DC voltage to the local oscillator input. The shift in the DC bias level at the local oscillator input of the mixer circuit provided by the apparatus and method reduces even order distortion in the mixer circuit, including second order intermodulation (IM2) distortion.

摘要翻译： 描述用于跟踪在无线通信系统中使用的混频器电路中的DC偏移并用于提供本地振荡器DC偏置电平移位以减少由DC偏移引起的偶数阶失真的装置和方法。 该装置具有耦合到混频器电路输出的输入端，用于接收混频器电路输出端上存在的直流电压。 直流电压包括偏移分量。 电平移位电路耦合到输入端，用于将接收到的直流电压电平移位预定量。 电平移位电路的输出耦合到本地振荡器输入，用于将电平移位的DC电压输出到本地振荡器输入。 由设备和方法提供的混频器电路的本地振荡器输入端的直流偏置电平的偏移降低了混频器电路中的偶数阶失真，包括二阶互调（IM2）失真。

公开(公告)号：US06631257B1

公开(公告)日：2003-10-07

申请号：US09553974

申请日：2000-04-20

申请人： William A. White ,  Geoffrey C. Dawe

发明人： William A. White ,  Geoffrey C. Dawe

IPC分类号： H04B128

CPC分类号： H03D7/1433 ,  H03D7/1425 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/1491 ,  H03D2200/0043 ,  H03D2200/0088

摘要： A system and method for a mixer circuit places the RF and mixer core LO transistors on the same level in anti-series. The mixer circuit provides increased headroom, excellent linearity, controllable conversion-gain, and operates with a reduced supply voltage requirement.

摘要翻译： 用于混频器电路的系统和方法将RF和混频器核心LO晶体管放置在相同的电平上以反串联。 混频器电路提供增加的净空，优异的线性度，可控转换增益，并且以降低的电源电压要求运行。

公开(公告)号：US20030176177A1

公开(公告)日：2003-09-18

申请号：US10359535

申请日：2003-02-06

发明人： Alyosha C. Molnar ,  Rahul Magoon

IPC分类号： H04B001/00 ,  H04B001/26

CPC分类号： H03D7/1433 ,  H03D7/1408 ,  H03D7/1425 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/1475 ,  H03D7/1491 ,  H03D2200/0047

摘要： A direct conversion receiver for receiving a first input signal and directly downconverting it to baseband frequencies. The receiver includes a frequency translator which is responsive to a phase-split input signal having 2n components, wherein n is an integer greater than 1. The phase-split signal has a period T which is about n times the period of the first input. The frequency translator alternates, at a rate of about 2n/T, between switching the first input signal to a first output, and switching the first signal to a second output. A preprocessor is available to improve the switching characteristics of the phase-split input signal.

公开(公告)号：US20030169090A1

公开(公告)日：2003-09-11

申请号：US10352788

申请日：2003-01-28

申请人： STMicroelectronics S.r.l.

发明人： Pietro Filoramo ,  Angelo Granata

IPC分类号： G06G007/20 ,  G06G007/16 ,  G06F007/44

CPC分类号： H03G1/0023 ,  H03D7/1433 ,  H03D7/1458 ,  H03D7/1491 ,  H03D2200/0025 ,  H03D2200/0043

摘要： An exponentially variable gain mixer circuit includes an oscillating circuit generating an alternating differential signal. A correction circuit is connected to the oscillating circuit and includes a first amplifier and a differential amplifier. The first amplifier receives an external gain variation command and generates a differential output signal that includes a control voltage and a bias voltage. The differential amplifier receives the alternating differential signal and generates a differential modulation signal. A variable gain mixer receives an input differential signal and generates an amplified differential signal as a function of the differential modulation signal and the control voltage.

摘要翻译： 指数可变增益混频器电路包括产生交流差分信号的振荡电路。 校正电路连接到振荡电路，并包括第一放大器和差分放大器。 第一放大器接收外部增益变化指令，并产生包括控制电压和偏置电压的差分输出信号。 差分放大器接收交流差分信号并产生差分调制信号。 可变增益混频器接收输入差分信号并产生作为差分调制信号和控制电压的函数的放大的差分信号。

公开(公告)号：US06560451B1

公开(公告)日：2003-05-06

申请号：US09419311

申请日：1999-10-15

申请人： Shyam S. Somayajula

发明人： Shyam S. Somayajula

IPC分类号： H04B126

CPC分类号： H03D7/1441 ,  H03D7/1433 ,  H03D7/1491 ,  H03D2200/0043 ,  H03D2200/0047

摘要： An analog multiplier or mixer that mixes a signal fc with a square wave local oscillator improves heterodyning operation of a circuit. In various square wave analog multiplier or mixer embodiments, heterodyning performance is improved in noise reduction, saturation performance, linearity, and other measures by adding a DC current path in parallel to a signal current path of the multiplier or mixer. The parasitic capacitances, noise, and nonlinearity problems in a heterodyning circuit are solved by adding a path to a square wave mixer for carrying the signal current and the DC current on different paths. An apparatus includes a circuit coupled between a first voltage reference and a second voltage reference. The circuit includes a first square wave oscillator branch and a second square wave oscillator branch. The first square wave oscillator branch is driven by a square wave oscillator signal and the second square wave oscillator branch is driven by an inverse of the square wave oscillator signal. The first and second square wave oscillator branches each include a DC current path and a signal current path. The signal current path is driven by the square wave oscillator signal and the inverse of the square wave oscillator signal, respectively.

摘要翻译： 将信号fc与方波本地振荡器混合的模拟乘法器或混频器可以改善电路的外差操作。 在各种方波模拟乘法器或混频器实施例中，通过将乘法器或混频器的信号电流路径并行的DC电流路径相加来降低噪声降低，饱和性能，线性度和其他措施的外差性能。 外插电路中的寄生电容，噪声和非线性问题通过在方波混频器中增加路径来解决，该方波承载信号电流和不同路径上的直流电流。 一种装置包括耦合在第一参考电压和第二电压基准之间的电路。 该电路包括第一方波振荡器分支和第二方波振荡器分支。 第一方波振荡器分支由方波振荡器信号驱动，第二方波振荡器分支由方波振荡器信号的反相驱动。 第一和第二方波振荡器分支各自包括DC电流路径和信号电流路径。 信号电流路径分别由方波振荡器信号和方波振荡器信号的反相驱动。

公开(公告)号：US20020146991A1

公开(公告)日：2002-10-10

申请号：US09829105

申请日：2001-04-09

申请人： Koninklijke Philips Electronics N.V.

发明人： Abolfazl Khosrowbeygi ,  Petrus M. Stroet

IPC分类号： H04B001/04

CPC分类号： H03D7/1425 ,  H03D7/1433 ,  H03D7/1491 ,  H03D2200/0023 ,  H03D2200/0033 ,  H03D2200/0043

摘要： A power mixer architecture for a transmitter chip is disclosed. The power mixer architecture is a mixing stage including one or more upper trees, and one or more lower trees. Each lower tree is selectively activated to receive current biasing signals, and current intermediate frequency signals. Upon receipt, the activated lower tree activates a corresponding upper tree to receive one or more amplified current intermediate frequency signals from the lower tree. In conjunction with a reception of voltage local oscillating signals, the upper tree provides voltage radio frequency signals. The gain of the lower tree is designed to be constant over any variance in a temperature, supply voltage or processing performance of the transmitter chip.

摘要翻译： 公开了用于发射机芯片的功率混频器架构。 动力混合器结构是混合阶段，包括一个或多个上部树木，以及一个或多个较低的树木。 选择性地激活每个下层树以接收电流偏置信号和当前的中频信号。 在接收到时，激活的下层树启动相应的上层树，以从下层树接收一个或多个放大的当前中频信号。 结合接收电压本地振荡信号，上层树提供电压射频信号。 下层树的增益被设计为在发射器芯片的温度，电源电压或处理性能的任何变化上都是恒定的。

公开(公告)号：US20020113650A1

公开(公告)日：2002-08-22

申请号：US09942573

申请日：2001-08-31

发明人： Bonkee Kim ,  Kwyro Lee

IPC分类号： H03F003/45

CPC分类号： H03F1/3205 ,  H03D7/145 ,  H03D7/1458 ,  H03D7/1491 ,  H03D2200/0043 ,  H03D2200/0084 ,  H03F1/223 ,  H03F1/3211 ,  H03F3/19 ,  H03F3/60 ,  H03F2200/294 ,  H03F2200/372 ,  H03F2203/21178

摘要： The present invention relates to the improvement of linearity of active devices, which can be degraded by the trans-conductance thereof. According to the present invention, an amplifier circuit is provided, which comprises: a main active device having first, second, and third terminal, wherein quantity and direction of current flowing from the second terminal to the third terminal is varying in dependant on voltage driven to the first terminal; an auxiliary active device having first, second, and third terminal, wherein quantity and direction of current flowing from the second terminal to the third terminal is varying in dependant on voltage driven to the first terminal; and a biasing unit connected to the first terminals of the main and auxiliary active devices, the third terminals of the main and auxiliary active devices, voltage source, an input terminal, and an output terminal, by which each of the main and auxiliary active devices operates primarily in saturation region and sub-threshold region, respectively.

摘要翻译： 本发明涉及有源器件的线性度的提高，其可能由于其反电导而降低。 根据本发明，提供了一种放大器电路，其包括：主有源器件，具有第一，第二和第三端子，其中从第二端子到第三端子的电流的量和方向根据电压驱动而变化 到第一个终端; 具有第一，第二和第三端子的辅助有源器件，其中从所述第二端子流到所述第三端子的电流的量和方向取决于被驱动到所述第一端子的电压而变化; 以及连接到主和辅助有源器件的第一端子，主和辅助有源器件的第三端子，电压源，输入端子和输出端子的偏压单元，通过该偏置单元，主和辅助有源器件 分别主要在饱和区域和次阈值区域中工作。

公开(公告)号：US06388529B2

公开(公告)日：2002-05-14

申请号：US09758424

申请日：2001-01-12

申请人： Hideo Morohashi ,  Shinichi Tanabe

发明人： Hideo Morohashi ,  Shinichi Tanabe

IPC分类号： H03F304

CPC分类号： H03F1/302 ,  H03D7/1433 ,  H03D7/1458 ,  H03D7/1491 ,  H03D2200/0025 ,  H03D2200/0043 ,  H03F2200/372

摘要： A grounded emitter amplifier and a radio communication device using the same in which a bias voltage is generated in order to adjust an emitter current of a transistor in a grounded emitter amplification circuit so that the emitter current does not receive an influence of variations in several parameters of the transistor such as a current amplification factor hfe.

摘要翻译： 接地发射极放大器和使用其的无线电通信装置，其中产生偏置电压以调整接地发射极放大电路中的晶体管的发射极电流，使得发射极电流不受数个参数的变化的影响 的晶体管，例如电流放大系数hfe。

公开(公告)号：US06335651B1

公开(公告)日：2002-01-01

申请号：US09725046

申请日：2000-11-29

申请人： Nader Fayyaz

发明人： Nader Fayyaz

IPC分类号： G06F744

CPC分类号： H03D7/1425 ,  H03D7/1433 ,  H03D7/1491 ,  H03D2200/0084

摘要： A mixer is designed to operate from a low voltage power source connected via a power terminal and ground and includes a balanced mixer circuit with a balanced input port for receiving local oscillator signals, and a pair of input terminals. A biasing circuit includes, an active voltage divider connected between the power terminal and ground to provide higher and lower voltages at first and second voltage taps. A differential driver circuit includes first and second transistors, collectors of which are each direct coupled to separate ones of the pair of input terminals. The first transistor has a base coupled via a capacitor to a single ended receive signal terminal, and an emitter coupled via a first resistor to ground. The second transistor has a base coupled via a capacitor to grounds, and an emitter coupled via a second resistor to the single ended receive signal terminal. The single ended receive signal terminal is also coupled with ground via an impedance element, in one example third resistor. A fourth resistor is connected between the first voltage tap and the base of the second transistor and, a fifth resistor is connected between the second voltage tap and the base electrode of the first transistor.

摘要翻译： 混频器设计用于经由电源端子和接地连接的低压电源进行操作，并且包括具有用于接收本地振荡器信号的平衡输入端口的平衡混频器电路和一对输入端子。 偏置电路包括连接在电源端子和地之间的有源分压器，以在第一和第二电压抽头提供更高和更低的电压。 差分驱动器电路包括第一和第二晶体管，其集电极各自直接耦合以分离一对输入端。 第一晶体管具有经由电容器耦合到单端接收信号端子的基极，以及经由第一电阻器接地的发射极。 第二晶体管具有经由电容器接地的基极，以及经由第二电阻器耦合到单端接收信号端子的发射极。 在一个示例性的第三电阻器中，单端接收信号端子还通过阻抗元件与地耦合。 第四电阻连接在第一电压抽头和第二晶体管的基极之间，第五电阻连接在第二电压抽头和第一晶体管的基极之间。

公开(公告)号：US06211718B1

公开(公告)日：2001-04-03

申请号：US09003908

申请日：1998-01-07

申请人： Viatcheslav I Souetinov

发明人： Viatcheslav I Souetinov

IPC分类号： G06G7016

CPC分类号： H03D7/1425 ,  B01F13/0059 ,  H03D7/12 ,  H03D7/125 ,  H03D7/1433 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/1491 ,  H03D2200/0043 ,  H03D2200/0084

摘要： Mixer circuit 300 receives a single-ended rf voltage signal on terminal 330 and a bias potential on terminal 361. Transistor 301 functions as a transconductance amplifier and presents a current signal, representative of the input voltage signal, to mixer core 391. Inductor 310 provides noiseless degeneration in the base-emitter circuit of transistor 301. Local oscillator driver 393 is configured such that its common mode output impedance is higher than the input impedance of transistors 305 and 306. In this way, phase splitting is carried out within the mixer core 391 itself and less transistors are needed. Mixer circuit 300 thereby requires less voltage headroom than prior art mixers.

摘要翻译： 混频器电路300在端子330上接收单端RF电压信号，并在端子361上接收偏置电位。晶体管301用作跨导放大器，并将表示输入电压信号的电流信号呈现给混频器芯391.电感器310提供 晶体管301的基极 - 发射极电路中的无噪声退化。本地振荡器驱动器393被配置为使得其共模输出阻抗高于晶体管305和306的输入阻抗。以这种方式，在混频器核心 391本身需要更少的晶体管。 混频器电路300因此比现有技术的混频器要求更少的电压余量。