公开(公告)号：US09274200B2

公开(公告)日：2016-03-01

申请号：US14017391

申请日：2013-09-04

Applicant: VIA Telecom, Inc.

Inventor： Hsien-Ku Chen ,  Bing-Jye Kuo ,  Fang-Ren Liao ,  Pei-Wei Chen

IPC: G01R35/00 ,  G01R31/02 ,  G01R31/06 ,  G01R31/28

CPC classification number: G01R35/00 ,  G01R31/028 ,  G01R31/06 ,  G01R31/2822 ,  G01R35/005

Abstract: A frequency detection circuit includes a filter, a power detector and a voltage comparator. The filter receives and filters a converted signal to generate a filtered signal. The power of the filtered signal relates to a frequency of the converted signal. The power detector generates a voltage according to the power of the filtered signal. The voltage comparator compares the voltage with multiple reference voltages to generate multiple comparison results. At least one of the inductance and capacitance of an LC tank in an amplifier is adjusted according to the comparison results.

Abstract translation: 频率检测电路包括滤波器，功率检测器和电压比较器。 滤波器接收并过滤转换的信号以产生滤波信号。 滤波信号的功率与转换信号的频率有关。 功率检测器根据滤波信号的功率产生电压。 电压比较器将电压与多个参考电压进行比较，以产生多个比较结果。 根据比较结果调整放大器中LC箱的电感和电容中的至少一个。

公开(公告)号：US20140120846A1

公开(公告)日：2014-05-01

申请号：US14066699

申请日：2013-10-30

Applicant: VIA Telecom, Inc.

Inventor： Bing-Jye Kuo ,  Hsien-Ku Chen

IPC: H04B1/40

CPC classification number: H04B1/40 ,  H03D7/1466 ,  H03D7/165

Abstract: A mixing unit includes a baseband signal processing unit, a radio frequency (RF) signal processing unit and a mixing unit. The baseband signal processing unit receives or generates a baseband signal. The RF signal processing unit processes or outputs a RF signal. The mixing unit is coupled to the baseband signal processing unit and the RF signal processing unit to select and operate in an up-convert mode or a down-convert mode according to a control signal. When the mixer operates in an up-convert mode, the mixing unit mixes the baseband signal with a local oscillation signal to generate the RF signal and outputs the RF signal to the RF signal processing unit. When the mixer operates in a down-convert mode, the mixing unit mixes the RF signal with the local oscillation signal to generate the baseband signal and outputs the baseband signal to the baseband signal processing unit.

Abstract translation: 混合单元包括基带信号处理单元，射频（RF）信号处理单元和混合单元。 基带信号处理单元接收或生成基带信号。 RF信号处理单元处理或输出RF信号。 混合单元耦合到基带信号处理单元和RF信号处理单元，以根据控制信号选择并以上变频模式或下变频模式操作。 当混合器以升压转换模式工作时，混合单元将基带信号与本地振荡信号混合以产生RF信号，并将RF信号输出到RF信号处理单元。 当混合器以降压转换模式工作时，混合单元将RF信号与本地振荡信号混合以产生基带信号，并将基带信号输出到基带信号处理单元。