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    • 86. 发明授权
    • Electrical grounding arrangement for a printed circuit board of a
microwave oven
    • 微波炉印刷电路板的电气接地装置
    • US5856656A
    • 1999-01-05
    • US897310
    • 1997-07-21
    • Geun-Soo Kim
    • Geun-Soo Kim
    • F24C7/02H05B6/80H05K9/00H05B6/68
    • H05B6/66H05K9/0039
    • The present invention relates to a ground structure of a printed circuit board in a microwave oven, where the microwave oven formed with a screw hole at a tip end of a bar extended from a body thereof and having a jumper wire connected to a ground pattern at around a screw hole formed at a printed circuit board while a bolt is screwed to a control panel through a screw hole formed at the tip end of the bar and through a screw hole formed at the printed circuit board are connected by the jumper wire, so that the printed circuit board is automatically connected and grounded to the body of the microwave oven when the printed circuit board is fastened to the control panel, thereby providing a convenience in assembly of the microwave oven and a stability thereto.
    • 本发明涉及一种微波炉中的印刷电路板的接地结构,其中微波炉在其从其本体延伸的杆的尖端处形成有螺纹孔,并且具有连接到接地图案的跳线 围绕形成在印刷电路板上的螺孔,而螺栓通过形成在杆的顶端处的螺钉孔和通过形成在印刷电路板上的螺孔而拧到控制面板上,通过跳线连接,因此 当印刷电路板被固定到控制面板上时,印刷电路板自动地连接并接地到微波炉的主体,从而提供了微波炉的组装方便和稳定性。
    • 89. 发明授权
    • Method for minimizing radio frequency emissions from plug-in adapter
cards in computer systems
    • 用于最小化计算机系统中插入式适配器卡的射频发射的方法
    • US5686871A
    • 1997-11-11
    • US678888
    • 1996-07-12
    • Jozef B. Baran
    • Jozef B. Baran
    • H05K1/02H05K1/14H05K9/00
    • H05K9/0039H05K1/0227H05K1/0233H05K1/141H05K2201/093H05K2201/09663H05K2201/1006
    • Noise generated in a computer system on a modem adapter card is effectively suppressed by providing an extension to a voltage reference plane. The extension reference plane is coupled to the voltage reference plane of the adapter card by an impedance circuit. The extension reference plane causes the adapter card to have a composite reference plane which has an overall length greater than one-quarter of the wavelength of the signal to be suppressed such that the composite reference plane does not resonate at the frequency of the signal which generated the noise. The reference planes are preferably connected by a resonant circuit so that the two reference planes are effectively electrically connected at high frequencies and are electrically disconnected at low frequencies so that resonance of the boards is also suppressed at the lower frequencies.
    • 通过向电压参考平面提供扩展,有效地抑制了在调制解调器适配器卡上的计算机系统中产生的噪声。 扩展参考平面通过阻抗电路耦合到适配器卡的电压参考平面。 扩展参考平面使得适配器卡具有复合参考平面,其总长度大于要抑制的信号的波长的四分之一,使得复合参考平面在产生的信号的频率上不共振 噪音。 参考平面优选地通过谐振电路连接,使得两个参考平面在高频下被有效地电连接并且在低频下电断开,使得板的谐振也被抑制在较低的频率。