公开(公告)号：US07415260B2

公开(公告)日：2008-08-19

申请号：US10795740

申请日：2004-03-08

Applicant: Troy L. Stockstad ,  Klaas Wortel ,  Luis J. Briones ,  David Lovelace

Inventor： Troy L. Stockstad ,  Klaas Wortel ,  Luis J. Briones ,  David Lovelace

IPC: H04B1/00

CPC classification number: H04B1/30

Abstract: A current-mode direct conversion RF receiver is presented. In one set of embodiments the RF receiver comprises a simple transconductor input stage to create a current-mode modulated signal from a voltage-mode modulated signal. A downconversion mixer may be coupled to the transconductor input stage via a low impedance current cascode stage, and may operate to create a set of current-mode quadrature baseband signals from the current-mode modulated signal. The downconversion mixer may be implemented with a transistor-switching network, which may be driven by a phase locked loop (PLL) with quadrature outputs. The set of current-mode quadrature baseband signals may be converted back to the voltage domain by a transimpedance filter, which may perform channel selection for the receiver. The transimpedance filter may additionally include a low frequency zero to remove DC offsets. The receiver may be implemented using CMOS design technologies and operated with minimal self-mixing effects, minimal DC offset in the baseband signal, and utilizing low voltages.

Abstract translation: 提出了一种电流模式直接转换RF接收机。 在一组实施例中，RF接收机包括简单的跨导体输入级，以从电压模式调制信号产生电流模式调制信号。 下变频混频器可以经由低阻抗电流共源共栅级耦合到跨导体输入级，并且可以操作以从当前模式调制信号创建一组电流模式正交基带信号。 下变频混频器可以用晶体管切换网络来实现，其可以由具有正交输出的锁相环（PLL）来驱动。 电流模式正交基带信号的集合可以通过跨阻滤波器转换回电压域，该跨阻滤波器可以对接收机执行信道选择。 跨阻滤波器可以另外包括用于去除DC偏移的低频零点。 接收机可以使用CMOS设计技术来实现，并且以最小的自混合效应，基带信号中的最小DC偏移和利用低电压进行操作。

公开(公告)号：USD658502S1

公开(公告)日：2012-05-01

申请号：US29388199

申请日：2011-03-25

Applicant: Scott G. Strobel ,  Ronald Lee Schoelkopf ,  David Lovelace

Designer： Scott G. Strobel ,  Ronald Lee Schoelkopf ,  David Lovelace

公开(公告)号：US20060217087A1

公开(公告)日：2006-09-28

申请号：US11413999

申请日：2006-04-28

Applicant: William Snelgrove ,  David Lovelace ,  Richard Wilson ,  Kelly Mekechuk ,  Thomas Blease

Inventor： William Snelgrove ,  David Lovelace ,  Richard Wilson ,  Kelly Mekechuk ,  Thomas Blease

IPC: H01Q11/12 ,  H04B1/04

CPC classification number: H03G11/02 ,  H03F1/02 ,  H03F1/0205 ,  H03F1/0238 ,  H03F1/34 ,  H03F3/24 ,  H03F2200/331 ,  H03F2200/78

Abstract: A radio frequency power amplifier and corresponding method is arranged and configured to drive a resonant load. The radio frequency power amplifier includes a radio frequency switching stage with an output that is coupled to a resonant circuit. The switching stage is configured to provide an output signal with amplitude modulation corresponding to amplitude modulation of an input signal when powered from a fixed voltage power supply. The amplifier further includes a feedback control system coupled to the input signal and the output signal, where the feedback control system includes a sequencer configured to provide a sequencer output that is used to drive the radio frequency switching stage. The amplifier also includes an amplitude control system coupled to the output of the radio frequency switching stage and configured to limit an amplitude of the output signal and in some embodiments a power recovery system.

Abstract translation: 射频功率放大器和相应的方法被布置和配置成驱动谐振负载。 射频功率放大器包括具有耦合到谐振电路的输出的射频切换级。 开关级被配置为当从固定电压电源供电时，提供对应于输入信号的幅度调制的幅度调制的输出信号。 放大器还包括耦合到输入信号和输出信号的反馈控制系统，其中反馈控制系统包括被配置为提供用于驱动射频切换级的定序器输出的定序器。 放大器还包括耦合到射频切换级的输出并被配置为限制输出信号的幅度并且在一些实施例中是功率恢复系统的幅度控制系统。

公开(公告)号：US20050197090A1

公开(公告)日：2005-09-08

申请号：US10795740

申请日：2004-03-08

Applicant: Troy Stockstad ,  Klaas Wortel ,  Luis Briones ,  David Lovelace

Inventor： Troy Stockstad ,  Klaas Wortel ,  Luis Briones ,  David Lovelace

IPC: H04B1/00 ,  H04B1/69 ,  H04B1/707 ,  H04B1/713

CPC classification number: H04B1/30

Abstract: A current-mode direct conversion RF receiver is presented. In one set of embodiments the RF receiver comprises a simple transconductor input stage to create a current-mode modulated signal from a voltage-mode modulated signal. A downconversion mixer may be coupled to the transconductor input stage via a low impedance current cascode stage, and may operate to create a set of current-mode quadrature baseband signals from the current-mode modulated signal. The downconversion mixer may be implemented with a transistor-switching network, which may be driven by a phase locked loop (PLL) with quadrature outputs. The set of current-mode quadrature baseband signals may be converted back to the voltage domain by a transimpedance filter, which may perform channel selection for the receiver. The transimpedance filter may additionally include a low frequency zero to remove DC offsets. The receiver may be implemented using CMOS design technologies and operated with minimal self-mixing effects, minimal DC offset in the baseband signal, and utilizing low voltages.

Abstract translation: 提出了一种电流模式直接转换RF接收机。 在一组实施例中，RF接收机包括简单的跨导体输入级，以从电压模式调制信号产生电流模式调制信号。 下变频混频器可以经由低阻抗电流共源共栅级耦合到跨导体输入级，并且可以操作以从当前模式调制信号创建一组电流模式正交基带信号。 下变频混频器可以用晶体管切换网络来实现，其可以由具有正交输出的锁相环（PLL）来驱动。 电流模式正交基带信号的集合可以通过跨阻滤波器转换回电压域，该跨阻滤波器可以对接收机执行信道选择。 跨阻滤波器可以另外包括用于去除DC偏移的低频零点。 接收机可以使用CMOS设计技术来实现，并且以最小的自混合效应，基带信号中的最小DC偏移和利用低电压进行操作。