公开(公告)号：US20100302100A1

公开(公告)日：2010-12-02

申请号：US12719294

申请日：2010-03-08

申请人： CHAO-TUNG YANG ,  Fu-Cheng Wang ,  Shoufang Chen ,  Shuo-Yuan Hsiao

发明人： CHAO-TUNG YANG ,  Fu-Cheng Wang ,  Shoufang Chen ,  Shuo-Yuan Hsiao

IPC分类号： G01S19/33 ,  G01S19/36

CPC分类号： G01S19/36 ,  G01S19/33

摘要： A signal processing apparatus for a multi-mode satellite positioning system includes a band-pass filter, a local oscillator circuit, a first mixing circuit, a second mixing circuit, an analog-to-digital converter and a baseband circuit. By properly allocating a local frequency, radio frequency (RF) signals of a Global Positioning System (GPS), a Galileo positioning system and a Global Navigation System (GLONASS) are processed via a single signal path to save hardware cost.

摘要翻译： 一种用于多模式卫星定位系统的信号处理装置，包括带通滤波器，本地振荡器电路，第一混频电路，第二混频电路，模数转换器和基带电路。 通过适当地分配本地频率，通过单个信号路径处理全球定位系统（GPS），伽利略定位系统和全球导航系统（GLONASS）的射频（RF）信号以节省硬件成本。

公开(公告)号：US20100295597A1

公开(公告)日：2010-11-25

申请号：US12542007

申请日：2009-08-17

申请人： SHUO-YUAN HSIAO ,  CHAO-TUNG YANG ,  MING-CHUNG LIU

发明人： SHUO-YUAN HSIAO ,  CHAO-TUNG YANG ,  MING-CHUNG LIU

IPC分类号： G06G7/12

CPC分类号： G06G7/12

摘要： A mixer with high linearity and a low operating voltage is provided. The mixer includes a transconductor and a switch circuit. The transconductor receives a differential voltage signal and outputs a differential current signal accordingly. The transconductor includes a first resistor, a second resistor, a differential amplifier, a first current source and a second current source. The switch circuit includes a first switch, a second switch, a third switch, and a fourth switch. The first and second switches are coupled to a first input of the differential amplifier, while the third and fourth switches are coupled to a second input of the differential amplifier. The first and third switches are mutually coupled to provide an output of the mixer, while the second and fourth switched are mutually coupled to provide another output of the mixer. Each of the first, second, third and fourth switches determines whether to allow the differential current signal to pass through according to a differential control signal.

摘要翻译： 提供具有高线性度和低工作电压的混频器。 混频器包括跨导器和开关电路。 跨导体接收差分电压信号并相应地输出差分电流信号。 跨导体包括第一电阻器，第二电阻器，差分放大器，第一电流源和第二电流源。 开关电路包括第一开关，第二开关，第三开关和第四开关。 第一和第二开关耦合到差分放大器的第一输入端，而第三和第四开关耦合到差分放大器的第二输入端。 第一和第三开关相互耦合以提供混频器的输出，而第二和第四开关相互耦合以提供混频器的另一输出。 第一，第二，第三和第四开关中的每一个确定是否允许差分电流信号根据差分控制信号通过。