公开(公告)号：US20100060363A1

公开(公告)日：2010-03-11

申请号：US12423764

申请日：2009-04-14

申请人： Seon Ho Han ,  Kim Cheon Soo ,  Kim Jae Young ,  Yu Hyun Kyu

发明人： Seon Ho Han ,  Kim Cheon Soo ,  Kim Jae Young ,  Yu Hyun Kyu

IPC分类号： H03F3/191

CPC分类号： H03F1/26 ,  H03F1/565 ,  H03F3/195 ,  H03F2200/222 ,  H03F2200/294 ,  H03F2200/36 ,  H03F2200/451

摘要： A wideband low-noise amplifier includes a source-degenerated common-source amplifier, a common-gate amplifier, and a matching frequency band determiner. The source-degenerated common-source amplifier is configured to amplify an input signal to output a first signal that is opposite in phase to the input signal. The common-gate amplifier is connected in parallel to the source-degenerated common-source amplifier to amplify the input signal to output a second signal that has the same phase as the input signal. The matching frequency band determiner is configured to isolate an input terminal of the source-degenerated common-source amplifier and an input terminal of the common-gate amplifier and determine a matching frequency band.

摘要翻译： 宽带低噪声放大器包括源极退化的共源放大器，共栅放大器和匹配的频带确定器。 源极退化的共源放大器被配置为放大输入信号以输出与输入信号相位相反的第一信号。 共栅放大器与源极简并公共源放大器并联连接，以放大输入信号以输出与输入信号具有相同相位的第二信号。 匹配频带确定器被配置为隔离源极退化的共源极放大器的输入端和公共栅极放大器的输入端，并确定匹配的频带。

公开(公告)号：US20080272895A1

公开(公告)日：2008-11-06

申请号：US11969369

申请日：2008-01-04

申请人： Kim Jae Young ,  Lee Woo Bum ,  Eom Seong Ki

发明人： Kim Jae Young ,  Lee Woo Bum ,  Eom Seong Ki

IPC分类号： G08B3/00

CPC分类号： G10K9/13

摘要： Contemplated magnetic buzzers include an elliptical or oblong resonator and magnet that significantly improve sound pressure level and audio quality. Most preferably, the resonator and magnet are disposed in a housing that comprises tab insertion channels that are fluidly coupled to solder channels, and tabs are coupled to and disposed within correspondingly shaped recesses in the housing to facilitate SMT mounting and to improve electrical contact stability.

摘要翻译： 考虑到的磁蜂鸣器包括椭圆形或椭圆形的谐振器和磁体，显着提高声压级和音频质量。 最优选地，谐振器和磁体设置在包括流体耦合到焊接通道的突片插入通道的壳体中，并且突片联接到壳体中并布置在壳体中相应形状的凹部内，以便于SMT安装并改善电接触稳定性。