公开(公告)号：US20060170492A1

公开(公告)日：2006-08-03

申请号：US11047594

申请日：2005-02-02

申请人： Chang Sheng-Fuh ,  Chen Wen-Lin ,  Deng Wei-Yin ,  Chen Hung-Cheng ,  Tang Shu-Fen ,  Chen Albert

发明人： Chang Sheng-Fuh ,  Chen Wen-Lin ,  Deng Wei-Yin ,  Chen Hung-Cheng ,  Tang Shu-Fen ,  Chen Albert

IPC分类号： H03G3/20

CPC分类号： H03F3/195 ,  H03F1/56 ,  H03F2200/111 ,  H03F2200/294 ,  H03F2200/372 ,  H03G1/0029

摘要： The present invention discloses a dual-band power amplifier, capable of operating at a first frequency and a different second frequency simultaneously. The dual-band power amplifier comprises a first gain stage; a second power stage; an input matching unit electrically connected between the first gain stage and a signal input port; an inter-stage matching unit electrically connected between the first gain stage and the second power stage and an output matching unit electrically connected between the second power stage and an output signal port. According to the dual-band power amplifier and the design formula of matching circuit of the present invention, the present invention can simplify the circuit structure and is suitable for various dual-band communication systems.

摘要翻译： 本发明公开了一种能够同时工作在第一频率和不同的第二频率的双频带功率放大器。 双频带功率放大器包括第一增益级; 第二功率级; 电连接在第一增益级和信号输入端口之间的输入匹配单元; 电连接在第一增益级和第二功率级之间的级间匹配单元和电连接在第二功率级与输出信号端口之间的输出匹配单元。 根据本发明的双频带功率放大器和匹配电路的设计公式，本发明可以简化电路结构，适用于各种双频通信系统。

公开(公告)号：US20060276132A1

公开(公告)日：2006-12-07

申请号：US11145943

申请日：2005-06-07

申请人： Chang Sheng-Fuh ,  Chen Wen-Lin ,  Lu Yi-Yu ,  Chen Hung-Cheng ,  Tang Shu-Fen ,  Chen Albert

发明人： Chang Sheng-Fuh ,  Chen Wen-Lin ,  Lu Yi-Yu ,  Chen Hung-Cheng ,  Tang Shu-Fen ,  Chen Albert

IPC分类号： H04B7/00

CPC分类号： H04B1/48

摘要： The present invention discloses an antenna diversity switch, used for receiving and transmitting RF signals for dual-mode co-existence wireless communication system. The antenna diversity switch comprises a first transmitting port; a second transmitting port; a receiving port; a first control unit, electrically connected between the first transmitting port and a first antenna; a second control unit, electrically connected between the first transmitting port and a second antenna; a third control unit, electrically connected between the second transmitting port and the first antenna; a forth control unit, electrically connected between the second transmitting port and the second antenna; a fifth control unit, electrically connected between the receiving port and the first antenna; a sixth control unit, electrically connected between the receiving port and the second antenna. The antenna diversity switch according to the present invention meets the requirement of IEEE 802.11b/g WLAN and Bluetooth co-existence operation with reduction of three or four antennas in the prior art to two antennas. Moreover, it provides antenna diversity for both WLAN and Bluetooth systems, where in the prior-art WLAN and Bluetooth co-existence system only WLAN system has the antenna diversity.

公开(公告)号：US07340237B2

公开(公告)日：2008-03-04

申请号：US11187844

申请日：2005-07-25

申请人： Chang Sheng-Fuh ,  Chen Wen-Lin ,  Shiu Yu-Da ,  Chen Hung-Cheng ,  Tang Shu-Fen ,  Chen Albert

发明人： Chang Sheng-Fuh ,  Chen Wen-Lin ,  Shiu Yu-Da ,  Chen Hung-Cheng ,  Tang Shu-Fen ,  Chen Albert

IPC分类号： H04B1/26

CPC分类号： H03H11/28 ,  H03F1/565 ,  H03F3/191 ,  H03F3/195 ,  H03F2200/111 ,  H03F2200/165 ,  H03F2200/168 ,  H03F2200/171 ,  H03F2200/222 ,  H03F2200/387 ,  H03F2200/411 ,  H03F2200/451

摘要： The present invention discloses a dual-band active filter having filtering response and positive pass-band gain. The dual-band active filter includes an input match unit for gain match of the dual-band active filter and for having a band-pass filtering response; a first gain stage electrically connected to the first input match unit for providing the flat gain of the dual-band active filter; an inter-stage unit electrically connected to the first gain stage for matching gain and for having a band-stop filter response; a second gain stage electrically connected to the inter stage unit for providing the flat gain of the dual-band active filter; and an output unit electrically connected to the second gain stage for matching the dual-band active filter and for having a low-pass filtering response. The dual-band active filter according to the present invention uses the cascade connection of multiple filter stages to have band-pass filtering response at two different frequency bands and obtain high stop-band attenuation by providing plural transmission zeros in the stop-band.

摘要翻译： 本发明公开了一种具有滤波响应和正通带增益的双频带有源滤波器。 双频带有源滤波器包括用于双频带有源滤波器的增益匹配并具有带通滤波响应的输入匹配单元; 第一增益级，电连接到第一输入匹配单元，用于提供双频带有源滤波器的平坦增益; 电连接到第一增益级的级间单元，用于匹配增益并具有带阻滤波器响应; 电连接到所述级间单元以提供所述双频带有源滤波器的平坦增益的第二增益级; 以及输出单元，电连接到第二增益级，用于匹配双频带有源滤波器并具有低通滤波响应。 根据本发明的双频带有源滤波器使用多个滤波器级的级联来在两个不同的频带上进行带通滤波响应，并通过在阻带中提供多个传输零来获得高的阻带衰减。

公开(公告)号：US20070021088A1

公开(公告)日：2007-01-25

申请号：US11187844

申请日：2005-07-25

申请人： Chang Sheng-Fuh ,  Chen Wen-Lin ,  Shiu Yu-Da ,  Chen Hung-Cheng ,  Tang Shu-Fen ,  Chen Albert

发明人： Chang Sheng-Fuh ,  Chen Wen-Lin ,  Shiu Yu-Da ,  Chen Hung-Cheng ,  Tang Shu-Fen ,  Chen Albert

IPC分类号： H04B1/26

CPC分类号： H03H11/28 ,  H03F1/565 ,  H03F3/191 ,  H03F3/195 ,  H03F2200/111 ,  H03F2200/165 ,  H03F2200/168 ,  H03F2200/171 ,  H03F2200/222 ,  H03F2200/387 ,  H03F2200/411 ,  H03F2200/451

摘要： The present invention discloses a dual-band active filter having filtering response and positive pass-band gain. The dual-band active filter includes an input match unit for gain match of the dual-band active filter and for having a band-pass filtering response; a first gain stage electrically connected to the first input match unit for providing the flat gain of the dual-band active filter; an inter-stage unit electrically connected to the first gain stage for matching gain and for having a band-stop filter response; a second gain stage electrically connected to the inter stage unit for providing the flat gain of the dual-band active filter; and an output unit electrically connected to the second gain stage for matching the dual-band active filter and for having a low-pass filtering response. The dual-band active filter according to the present invention uses the cascade connection of multiple filter stages to have band-pass filtering response at two different frequency bands and obtain high stop-band attenuation by providing plural transmission zeros in the stop-band.

摘要翻译： 本发明公开了一种具有滤波响应和正通带增益的双频带有源滤波器。 双频带有源滤波器包括用于双频带有源滤波器的增益匹配并具有带通滤波响应的输入匹配单元; 第一增益级，电连接到第一输入匹配单元，用于提供双频带有源滤波器的平坦增益; 电连接到第一增益级的级间单元，用于匹配增益并具有带阻滤波器响应; 电连接到所述级间单元以提供所述双频带有源滤波器的平坦增益的第二增益级; 以及输出单元，电连接到第二增益级，用于匹配双频带有源滤波器并具有低通滤波响应。 根据本发明的双频带有源滤波器使用多个滤波器级的级联来在两个不同的频带上进行带通滤波响应，并通过在阻带中提供多个传输零来获得高的阻带衰减。