公开(公告)号：US06804499B2

公开(公告)日：2004-10-12

申请号：US09829105

申请日：2001-04-09

申请人： Abolfazl Khosrowbeygi ,  Petrus M. Stroet

发明人： Abolfazl Khosrowbeygi ,  Petrus M. Stroet

IPC分类号： H01Q1112

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：US06721548B1

公开(公告)日：2004-04-13

申请号：US09469330

申请日：1999-12-22

申请人： Rishi Mohindra ,  Petrus M. Stroet

发明人： Rishi Mohindra ,  Petrus M. Stroet

IPC分类号： H04B1700

CPC分类号： H04B17/318

摘要： A received signal strength indicator operating at low intermediate of zero intermediate frequency is provided. The received signal strength indicator forms absolute values from an in-phase signal component and a quadrature signal component of a low or zero intermediate frequency signal that represents a received radio frequency signal. The absolute values are added. Logarithmic signal processing is performed either before absolute signal forming or after adding. Finally, low pass filtering is performed.

摘要翻译： 提供了在零中频的低中间运行的接收信号强度指示器。 接收到的信号强度指示器表示来自表示所接收的射频信号的低或零中频信号的同相信号分量和正交信号分量的绝对值。 添加绝对值。 在绝对信号形成之前或之后进行对数信号处理。 最后，执行低通滤波。

公开(公告)号：US06169463A

公开(公告)日：2001-01-02

申请号：US09275368

申请日：1999-03-24

申请人： Rishi Mohindra ,  Petrus M. Stroet

发明人： Rishi Mohindra ,  Petrus M. Stroet

IPC分类号： H03C300

CPC分类号： H03C5/00 ,  H03C3/406 ,  H04L27/367

摘要： A quadrature modulator with set-and-forget carrier leakage compensation. The quadrature modulator comprises an in-phase and a quadrature branch. In the in-phase and quadrature branches, real-time digital signals are converted to analog signals, the analog signals are filtered, and the filtered analog signals are modulated with a carrier signal and a ninety degrees phase shifted version of the carrier, respectively. The modulated in-phase and quadrature signals are added so as to form a quadrature amplitude modulated signal. Preferably upon powering up of the quadrature modulator, in the in-phase and quadrature branches, carrier leakage is measured. The measured carrier leakage is supplied to comparators, which toggle, when carrier leakage is minimal in the respective in-phase and quadrature branches. Upon powering up of the quadrature modulator, the state machine starts signal generators which inject compensation signals into the in-phase and quadrature branches, respectively, so that dc-offsets in the in-phase and quadrature branches are reduced, thereby reducing the carrier leakage in the in-phase and quadrature branches. When the comparators toggle, the state machine is commanded to stop controlling the corresponding signal generators of which output signals are then frozen.

摘要翻译： 具有设置和忘记载波泄漏补偿的正交调制器。 正交调制器包括同相和正交分支。 在同相和正交分支中，实时数字信号被转换为模拟信号，模拟信号被滤波，滤波后的模拟信号分别用载波信号和载波的九十度相移版本进行调制。 加入调制的同相和正交信号以形成正交幅度调制信号。 优选地，在正交调制器上电时，在同相和正交分支中，测量载波泄漏。 所测量的载波泄漏提供给比较器，当相应的同相和正交分支中的载波泄漏最小时，该比较器将切换。 在正交调制器上电时，状态机启动分别将补偿信号注入到同相和正交分支中的信号发生器，使得同相和正交分支中的直流偏移减小，从而减小载波泄漏 在同相和正交分支中。 当比较器切换时，状态机被命令停止控制其输出信号然后被冻结的对应的信号发生器。

公开(公告)号：US08373503B1

公开(公告)日：2013-02-12

申请号：US13323753

申请日：2011-12-12

申请人： John P. Myers ,  Petrus M. Stroet

发明人： John P. Myers ,  Petrus M. Stroet

IPC分类号： H03F1/26

CPC分类号： H03F1/3223 ,  H03F1/3211 ,  H03F3/19 ,  H03F3/45085 ,  H03F2200/534 ,  H03F2203/45621 ,  H03F2203/45631 ,  H03F2203/45644 ,  H03F2203/45702

摘要： A mixer in an RF demodulator includes a transconductance amplifier that converts an RF input voltage (Vin), applied to the base of a first bipolar transistor, to a first output current. The first output current contains third order intermodulation (IM3) products. An IM3 canceller is connected in parallel with the transconductance amplifier. The base of a second bipolar transistor in the IM3 canceller is coupled to the DC component of Vin, and the AC component of Vin is coupled to the emitter of the second bipolar transistor, such that the currents though the first bipolar transistor and the currents through the second bipolar transistor change oppositely. The collectors of the transistors are coupled together. The values of components in the IM3 canceller are set so that the current generated by the IM3 canceller substantially cancels IM3 distortion in the first current or other current generated in a demodulator of Vin.

摘要翻译： RF解调器中的混频器包括将施加到第一双极晶体管的基极的RF输入电压（Vin）转换为第一输出电流的跨导放大器。 第一个输出电流包含三阶互调（IM3）产品。 IM3消除器与跨导放大器并联连接。 IM3消除器中的第二双极晶体管的基极耦合到Vin的DC分量，并且Vin的AC分量耦合到第二双极晶体管的发射极，使得通过第一双极晶体管的电流和通过 第二个双极晶体管相反地改变。 晶体管的集电极耦合在一起。 IM3消除器中的组件的值被设置为使得由IM3消除器产生的电流基本上消除了在Vin的解调器中产生的第一电流或其他电流中的IM3失真。