专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US06490440B1 Digital transmitter circuit and method of operation 失效
标题翻译：数字发射机电路及操作方法
公开(公告)号：US06490440B1
公开(公告)日：2002-12-03
申请号：US09323236
申请日：1999-06-01
申请人： James S. Mielke , Albert H. Higashi , Serge Drogi
发明人： James S. Mielke , Albert H. Higashi , Serge Drogi
IPC分类号： H04B102
CPC分类号： H04B1/0483 , H04B1/406
摘要： A transceiver (10) includes a transmitter (16) that receives a digital data stream from a digital signal processor (18) to delay lines (20, 30). The delay lines (20, 30) provide an address to a ROM look-up table (40). Another input of the look-up table (40) receives a signal that selects protocols such as TDMA, CDMA, and GSM. A multi-accumulator fractional-N synthesizer (48) receives phase derivative coefficients and a DAC (46) receives amplitude modulation coefficients from the look-up table (40) based on the selected protocol. The analog output signals from the DAC (46) and the synthesizer (48) are received by a variable gain amplifier (54) that generates an RF amplitude and frequency modulated output signal for transmission from the transmitter (16).
摘要翻译：收发器（10）包括从数字信号处理器（18）接收数字数据流以延迟线（20,30）的发射器（16）。延迟线（20,30）向ROM查找表（40）提供地址。查找表（40）的另一个输入接收选择诸如TDMA，CDMA和GSM之类的协议的信号。多累加器分数N合成器（48）接收相位导数系数，并且DAC（46）基于所选择的协议从查找表（40）接收幅度调制系数。来自DAC（46）和合成器（48）的模拟输出信号被可变增益放大器（54）接收，该可变增益放大器产生用于从发送器（16）传输的RF幅度和调频输出信号。

2. 发明授权

US06259318B1 Method for extending the liner range of an amplifier 有权
标题翻译：扩展放大器的线性范围的方法
公开(公告)号：US06259318B1
公开(公告)日：2001-07-10
申请号：US09322048
申请日：1999-05-28
申请人： James S. Mielke , Albert H. Higashi , Serge Drogi
发明人： James S. Mielke , Albert H. Higashi , Serge Drogi
IPC分类号： H03G320
CPC分类号： H03F1/3223 , H03F2200/372 , H04B1/406
摘要： A transceiver (10) includes a transmitter (16) that receives a digital data stream from a digital signal processor (18) to delay lines (20, 30). The delay lines (20,30) provide an address to a ROM look-up table (40). Another input of the look-up table (40) receives a signal that selects protocols such as TDMA, CDMA, and GSM. A multi-accumulator fractional-N synthesizer (48) receives phase derivative coefficients and a DAC (46) receives amplitude modulation coefficients from the look-up table (40) based on the selected protocol. The analog output signals from the DAC (46) and the synthesizer (48) are received by a variable gain amplifier (54) that generates an RF amplitude and frequency modulated output signal for transmission from the transmitter (16). The look-up table (40) stores phase derivative coefficients and amplitude modulation coefficients that correct for non-linearity in the variable gain amplifier (54).
摘要翻译：收发器（10）包括从数字信号处理器（18）接收数字数据流以延迟线（20,30）的发射器（16）。延迟线（20,30）向ROM查找表（40）提供地址。查找表（40）的另一个输入接收选择诸如TDMA，CDMA和GSM之类的协议的信号。多累加器分数N合成器（48）接收相位导数系数，并且DAC（46）基于所选择的协议从查找表（40）接收幅度调制系数。来自DAC（46）和合成器（48）的模拟输出信号被可变增益放大器（54）接收，该可变增益放大器产生用于从发送器（16）传输的RF幅度和调频输出信号。查找表（40）存储在可变增益放大器（54）中校正非线性的相位微分系数和幅度调制系数。

3. 发明授权

US5410113A Motion sensing apparatus 失效
标题翻译：运动感应装置
公开(公告)号：US5410113A
公开(公告)日：1995-04-25
申请号：US131240
申请日：1993-10-04
申请人： James S. Mielke
发明人： James S. Mielke
IPC分类号： H01H35/14
CPC分类号： H01H35/14 , Y10S200/29
摘要： A motion sensing apparatus comprises two substrates, contact means, and at least one electrically conductive element. A first substrate contains an electrically conductive layer disposed on one of its major surfaces. A second substrate contains a hole, including an interior surface that extends from one major surface to another, such that a cavity is formed by the planes of the major surfaces and the interior surface. The second substrate is positioned substantially parallel to the first substrate, such that the electrically conductive layer is positioned within an area defined by the hole. The contact means and the electrically conductive element are placed within the cavity, such that a motion sensing signal is produced when the electrically conductive element comes in contact with both the contact means and the electrically conductive layer.
摘要翻译：运动感测装置包括两个基板，接触装置和至少一个导电元件。第一基板包含设置在其主表面之一上的导电层。第二基板包含孔，包括从一个主表面延伸到另一主表面的内表面，使得空腔由主表面和内表面的平面形成。第二基板被定位成基本上平行于第一基板，使得导电层位于由孔限定的区域内。接触装置和导电元件放置在空腔内，使得当导电元件与接触装置和导电层接触时产生运动感测信号。

4. 发明授权

US5649008A Circuit and method of reducing sidetone in a receive signal path 失效
标题翻译：在接收信号路径中减少旁路的电路和方法
公开(公告)号：US5649008A
公开(公告)日：1997-07-15
申请号：US284950
申请日：1994-08-02
申请人： Scott K. Bader , Richard E. Hester , Michael L. Gomez , James S. Mielke
发明人： Scott K. Bader , Richard E. Hester , Michael L. Gomez , James S. Mielke
IPC分类号： H04M1/58 , H04M1/725 , H04M9/08
CPC分类号： H04M1/585 , H04M1/725 , H04M9/08
摘要： A cordless telephone has receive (12) and transmit (14) signal paths for passing voice signals. Sidetones normally appear in the receive signal path from the near party's voice. A signal strength comparator (34) monitors the transmit signal path and the receive signal path and asserts a gain control signal when the transmit path signal strength exceeds a threshold set to a predetermined value below the receive path signal strength. The gain control signal decreases the gain (42) in the receive signal path to reduce undesirably loud sidetones in the speaker earpiece. When the transmit path signal strength is less than the predetermined threshold, the gain control signal is not asserted allowing maximum amplification in the receive signal path as the sidetone is sufficiently small as to not interfere with the main received voice signal, or otherwise become noticeably loud in the speaker earpiece.
摘要翻译：无绳电话具有用于通过语音信号的接收（12）和发送（14）信号路径。 Sidetones通常出现在接近信号路径中，从近方的声音。信号强度比较器（34）监测发射信号路径和接收信号路径，并且当发射路径信号强度超过设定在低于接收路径信号强度的预定值的阈值时，发出增益控制信号。增益控制信号减小接收信号路径中的增益（42），以减少扬声器耳机中不希望有的大的侧音。当发送路径信号强度小于预定阈值时，增益控制信号不被断言，允许接收信号路径中的最大放大，因为侧音足够小，以致不干扰主接收到的语音信号，或以其他方式变得显着地响亮在扬声器耳机。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式