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. 发明申请

US20040023619A1 Transmission-and-receiving switching circuit not allowing superfluous signals to be input or output 审中-公开
标题翻译：传输和接收切换电路不允许输入或输出多余的信号
公开(公告)号：US20040023619A1
公开(公告)日：2004-02-05
申请号：US10611587
申请日：2003-06-30
申请人： Alps Electric Co., Ltd.
发明人： Toru Izumiyama
IPC分类号： H04B001/02
CPC分类号： H04B1/44
摘要： A transmission-and-receiving switching circuit includes a signal input-and-output end to which an antenna is connected; a transmission circuit connected to the signal input-and-output end through a first switching diode; a receiving circuit connected to the signal input-and-output end through a second switching diode; and first and second inductor elements for feeding bias voltages to the first switching diode and the second switching diode respectively. A first resonant circuit contains a first capacitor element and the first inductor element for at least series resonating between the first switching diode and ground. The series resonant frequency of the first resonant circuit is about equal to a frequency of a signal other than the transmission signal output from the transmission circuit.
摘要翻译：发送和接收切换电路包括天线所连接的信号输入和输出端; 通过第一开关二极管连接到信号输入和输出端的发送电路; 通过第二开关二极管连接到信号输入和输出端的接收电路; 以及用于分别向第一开关二极管和第二开关二极管馈送偏置电压的第一和第二电感器元件。第一谐振电路包括第一电容器元件和用于在第一开关二极管和地之间至少串联谐振的第一电感器元件。第一谐振电路的串联谐振频率大约等于从发送电路输出的发送信号以外的信号的频率。

2. 发明申请

US20030050031A1 Frequency conversion circuit having suppressed beat 审中-公开
标题翻译：具有抑制拍频的变频电路
公开(公告)号：US20030050031A1
公开(公告)日：2003-03-13
申请号：US10230784
申请日：2002-08-28
申请人： Alps Electric Co., Ltd.
发明人： Takeo Suzuki , Shoichi Asano , Toru Izumiyama
IPC分类号： H04B001/26 , H04B001/06 , H04B007/00
CPC分类号： H04B1/28 , H04B1/403
摘要： A frequency conversion circuit includes a first mixer for performing frequency conversion of a received signal having components disposed at first frequency intervals into a first intermediate frequency signal which has a frequency lower than that of the received signal and which has components disposed at predetermined frequency intervals, two second mixers for performing frequency conversion of the first intermediate frequency signal into a second intermediate frequency signal having a frequency lower than that of the first intermediate frequency signal. A first local oscillation signal changing at second frequency intervals different from the first frequency intervals is supplied to the firs mixer, and a second local oscillation signal having a frequency which is the reciprocal of an integer of the frequency of the first local oscillation signal is supplied to the second mixers.
摘要翻译：频率转换电路包括：第一混频器，用于将具有以第一频率间隔布置的分量的接收信号进行频率转换为具有低于接收信号的频率的第一中频信号，并且具有以预定频率间隔布置的分量，两个第二混频器，用于执行第一中频信号的频率转换成具有低于第一中频信号的频率的第二中频信号。将与第一频率间隔不同的第二频率间隔改变的第一本地振荡信号提供给第一混频器，并且提供具有作为第一本地振荡信号的频率的整数的倒数的频率的第二本地振荡信号到第二台搅拌机。

3. 发明申请

US20030214352A1 Power amplifier capable of adjusting operating point 失效
标题翻译：功率放大器能够调整工作点
公开(公告)号：US20030214352A1
公开(公告)日：2003-11-20
申请号：US10440921
申请日：2003-05-19
申请人： ALPS ELECTRIC CO., LTD.
发明人： Toru Izumiyama , Hideki Takeshita
IPC分类号： H03G003/10
CPC分类号： H03F1/302
摘要： The present invention includes a power amplifying stage having a power amplifying element having a main electrode and a control electrode, and a bias control circuit that is supplied with a bias switching voltage and an operating point adjusting voltage for adjusting the bias voltage value to the control electrode of the power amplifying element by the bias switching voltage and the operating point adjusting voltage and hence adjusting the operating point of the power amplifying element, wherein the bias control circuit adjusts the operating point of the power amplifying element by switching between supply and stop of the bias voltage to the control electrode of the power amplifying element by the bias switching voltage, and varying the bias voltage value to be supplied to the control electrode of the power amplifying element by the operating point adjusting voltage in phase.
摘要翻译：本发明包括功率放大级，具有具有主电极和控制电极的功率放大元件，以及偏置控制电路，被提供有偏置开关电压和工作点调整电压，用于将偏置电压值调整到控制通过偏置开关电压和工作点调整电压对功率放大元件的电极进行调节，从而调整功率放大元件的工作点，其中偏置控制电路通过在供电和停止之间切换来调节功率放大元件的工作点通过偏置开关电压向功率放大元件的控制电极施加偏置电压，并通过工作点调整电压同相改变要提供给功率放大元件的控制电极的偏置电压值。

4. 发明申请

US20030156390A1 Wireless LAN card with efficient productivity 审中-公开
标题翻译：无线网卡具有高效的生产力
公开(公告)号：US20030156390A1
公开(公告)日：2003-08-21
申请号：US10365342
申请日：2003-02-12
申请人： Alps Electric Co., Ltd.
发明人： Hideki Takeshita , Toru Izumiyama
IPC分类号： H05K001/14
CPC分类号： H04W88/02 , H05K1/0237 , H05K1/181 , H05K2201/09972 , H05K2201/10159 , H05K2201/10371 , Y02P70/611
摘要： A wireless LAN (local area network) card includes a circuit board having a plurality of connector terminals; a transmission and reception circuit formed on a surface of the circuit board; a baseband circuit formed on the surface; a non-volatile memory mounted on the surface; and a box-shaped cover for covering the transmission and reception circuit. The non-volatile memory is disposed in the vicinity of the transmission and reception circuit so that the transmission and reception circuit and the non-volatile memory are covered by the cover. The wireless LAN card requires no coating resin, and is therefore efficient in usability and cost.
摘要翻译：无线LAN（局域网）卡包括具有多个连接器端子的电路板; 形成在所述电路板的表面上的发送和接收电路; 表面形成的基带电路; 安装在表面上的非易失性存储器; 以及用于覆盖发送和接收电路的盒形盖。非易失性存储器设置在发送和接收电路附近，使得发送和接收电路和非易失性存储器被盖覆盖。无线LAN卡不需要涂布树脂，因此在可用性和成本方面是有效的。

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