公开(公告)号：US07333527B2

公开(公告)日：2008-02-19

申请号：US10306785

申请日：2002-11-27

申请人： Mark R. Greenstreet ,  Robert J. Bosnyak ,  Stuart A. Ridgway

发明人： Mark R. Greenstreet ,  Robert J. Bosnyak ,  Stuart A. Ridgway

IPC分类号： H04B1/00 ,  H03D3/24 ,  H03L7/06 ,  H03H11/26

CPC分类号： H04B15/04 ,  H04B2215/064 ,  H04B2215/067

摘要： The clock signal is the dominant source of electromagnetic interference (EMI) for many digital electronic devices. EMI generated by these electronic devices must be suppressed to avoid interference with other electronic devices and to satisfy FCC regulations. The present invention seeks to reduce EMI emissions by phase-modulating the clock signal using tunable delay lines. Phase modulation causes a spreading of the energy spectrum of the clock signal thereby reducing EMI emissions. In addition, the present invention is capable of generating a wide energy spectrum in a short time interval. Furthermore, the present invention can be similarly applied to other signals which exhibit a periodic or timing nature due to a correlation with the clock signal.

摘要翻译： 时钟信号是许多数字电子设备的电磁干扰（EMI）的主要来源。 必须抑制由这些电子设备产生的EMI，以避免与其他电子设备的干扰，并符合FCC规定。 本发明寻求通过使用可调延迟线对时钟信号进行相位调制来减少EMI发射。 相位调制导致时钟信号的能量谱的扩展，从而减少EMI辐射。 此外，本发明能够在短时间间隔内产生宽的能量谱。 此外，由于与时钟信号的相关性，本发明可以类似地应用于表现出周期性或定时性质的其他信号。