公开(公告)号：US5994961A

公开(公告)日：1999-11-30

申请号：US986481

申请日：1997-12-08

申请人： Gerald Lunn ,  Ka Hung Derek Wong ,  Jeff Ortiz ,  On Au-Yeung

发明人： Gerald Lunn ,  Ka Hung Derek Wong ,  Jeff Ortiz ,  On Au-Yeung

IPC分类号： H03F1/30 ,  H03F3/45 ,  H03G1/00 ,  H03G1/04 ,  H03G7/06

CPC分类号： H03G1/0023 ,  H03F1/302 ,  H03F3/45103 ,  H03G1/04 ,  H03G7/06 ,  H03F2203/45302 ,  H03F2203/45311 ,  H03F2203/45398 ,  H03F2203/45702

摘要： A gain control signal (VCTRL) is provided to a temperature compensating circuit (12) which produces a differential temperature compensating gain control signal (VDT). A gain compensating circuit (14) receives the differential temperature compensating gain control signal (VDT) and provides a differential gain and temperature compensating gain control signal (VDTG) to an amplifier (16). The differential gain and temperature compensating gain control signal (VDTG) varies the gain of the amplifier (16) to be substantially linear with respect to variation of the gain control signal (VCTRL) and to compensate for variation in temperature.

摘要翻译： 增益控制信号（VCTRL）被提供给产生差分温度补偿增益控制信号（VDT）的温度补偿电路（12）。 增益补偿电路（14）接收差分温度补偿增益控制信号（VDT），并向放大器（16）提供差分增益和温度补偿增益控制信号（VDTG）。 差分增益和温度补偿增益控制信号（VDTG）使放大器（16）的增益相对于增益控制信号（VCTRL）的变化基本上是线性的并且补偿温度变化。

公开(公告)号：US06952572B2

公开(公告)日：2005-10-04

申请号：US09885487

申请日：2001-06-20

申请人： Ka Hung Derek Wong ,  Ten Voon Wong

发明人： Ka Hung Derek Wong ,  Ten Voon Wong

IPC分类号： H03D7/18 ,  H04B1/28 ,  H04B1/26

CPC分类号： H03D7/18 ,  H04B1/28

摘要： An image rejection mixer includes first and second mixers, a phase shift circuit and a summer. The first mixer receives an RF input signal and a first local oscillator (LO) signal and generates a first intermediate frequency (IF) output signal. The second mixer receives the RF input signal and a second LO signal and generates a second IF output signal. The first LO signal is a phase lag signal (sin ωlot) and the second LO signal is a phase lead signal (−cos ωlot), where ωlot is a frequency signal generated by a local oscillator. The phase shift circuit is connected between the summer and the first mixer, receives the first IF output signal and generates a phase lag signal. The phase shift circuit causes the phase lag signal to lag the first IF output signal by about 90 degrees. The summer is connected to the phase shift circuit and the second mixer, receives the second IF output signal and the phase lag signal, and generates a combined IF output signal. The image rejection mixer is switchable between high and low side injection simply by inverting the second LO signal.

摘要翻译： 镜像抑制混频器包括第一和第二混频器，相移电路和夏季。 第一混频器接收RF输入信号和第一本地振荡器（LO）信号，并产生第一中频（IF）输出信号。 第二混频器接收RF输入信号和第二LO信号并产生第二IF输出信号。 第一LO信号是相位滞后信号（sinω），而第二LO信号是相位超前信号（-cosωωτt），其中ωω< t是由本地振荡器产生的频率信号。 相移电路连接在加法器和第一混频器之间，接收第一IF输出信号并产生相位滞后信号。 相移电路使相位延迟信号使第一IF输出信号滞后约90度。 夏季连接到相移电路和第二混频器，接收第二IF输出信号和相位滞后信号，并产生组合的IF输出信号。 通过反转第二LO信号，镜像抑制混频器可在高低端注入之间切换。