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1. 发明公开

EP1073194A3 Spread spectrum clock generator and associated method 失效
标题翻译：与光谱色散和方法assoziertes时钟发生器
公开(公告)号：EP1073194A3
公开(公告)日：2001-07-11
申请号：EP00119532.0
申请日：1994-11-29
申请人： Lexmark International, Inc.
发明人： Hardin, Keith B. , Fessler, John T. , Bush, Donald Reid , Booth, James Ronald
IPC分类号： H03C3/09 , H03B29/00
CPC分类号： H03C3/0966 , H03B29/00 , H03C3/0925 , H03C3/0941 , H03L7/0805 , H03L7/197 , H04B2215/064 , H04B2215/067
摘要： A clock circuit includes an oscillator (15) for generating a reference frequency signal, and a spread spectrum clock generator (14) cooperating with the oscillator for generating a spread spectrum clock output signal having a fundamental frequency and reduced amplitude EMI spectral components at harmonics of the fundamental frequency. The spread spectrum clock generator preferably includes a clock pulse generator for generating a series of clock pulses, and a spread spectrum modulator for frequency modulating the clock pulse generator to broaden and flatten amplitudes of EMI spectral components which would otherwise be produced by the clock pulse generator. The spread spectrum modulator frequency modulates the clock pulses with specific profiles of frequency deviation versus the period of the profile. Electronic devices including the spread spectrum clock circuit and associated method are also disclosed.

2. 发明授权

EP0655829B1 Spread spectrum clock generator and associated method 失效
标题翻译：与光谱色散和相关方法时钟发生器
公开(公告)号：EP0655829B1
公开(公告)日：2001-04-18
申请号：EP94308802.1
申请日：1994-11-29
申请人： LEXMARK INTERNATIONAL, INC.
发明人： Hardin, Keith B. , Fessler, John T. , Bush, Donald Reid , Booth, James Ronald
IPC分类号： H03C3/09 , H03B29/00
CPC分类号： H03C3/0966 , H03B29/00 , H03C3/0925 , H03C3/0941 , H03L7/0805 , H03L7/197 , H04B2215/064 , H04B2215/067

3. 发明公开

EP1073194A2 Spread spectrum clock generator and associated method 失效
标题翻译：扩频时钟发生器及相关方法
公开(公告)号：EP1073194A2
公开(公告)日：2001-01-31
申请号：EP00119532.0
申请日：1994-11-29
申请人： Lexmark International, Inc.
发明人： Hardin, Keith B. , Fessler, John T. , Bush, Donald Reid , Booth, James Ronald
IPC分类号： H03C3/09
CPC分类号： H03C3/0966 , H03B29/00 , H03C3/0925 , H03C3/0941 , H03L7/0805 , H03L7/197 , H04B2215/064 , H04B2215/067
摘要： A clock circuit includes an oscillator (15) for generating a reference frequency signal, and a spread spectrum clock generator (14) cooperating with the oscillator for generating a spread spectrum clock output signal having a fundamental frequency and reduced amplitude EMI spectral components at harmonics of the fundamental frequency. The spread spectrum clock generator preferably includes a clock pulse generator for generating a series of clock pulses, and a spread spectrum modulator for frequency modulating the clock pulse generator to broaden and flatten amplitudes of EMI spectral components which would otherwise be produced by the clock pulse generator. The spread spectrum modulator frequency modulates the clock pulses with specific profiles of frequency deviation versus the period of the profile. Electronic devices including the spread spectrum clock circuit and associated method are also disclosed.
摘要翻译：时钟电路包括用于产生参考频率信号的振荡器（15）以及与振荡器协作的扩频时钟发生器（14），用于产生扩频时钟输出信号，该扩频时钟输出信号具有基波频率和降低幅度的EMI频谱分量，基本频率。扩频时钟发生器最好包括一个用于产生一系列时钟脉冲的时钟脉冲发生器和一个用于对时钟脉冲发生器进行频率调制的扩频调制器，以扩大和平坦否则由时钟脉冲发生器产生的EMI频谱成分的幅度。扩频调制器频率调制具有相对于轮廓周期的频率偏差的特定轮廓的时钟脉冲。还公开了包括扩频时钟电路和相关方法的电子设备。

4. 发明授权

EP1073194B1 Spread spectrum clock generator and associated method 失效
标题翻译：与光谱色散和方法assoziertes时钟发生器
公开(公告)号：EP1073194B1
公开(公告)日：2007-06-27
申请号：EP00119532.0
申请日：1994-11-29
申请人： LEXMARK INTERNATIONAL, INC.
发明人： Hardin, Keith B. , Fessler, John T. , Bush, Donald Reid , Booth, James Ronald
IPC分类号： H03C3/09 , H03B29/00
CPC分类号： H03C3/0966 , H03B29/00 , H03C3/0925 , H03C3/0941 , H03L7/0805 , H03L7/197 , H04B2215/064 , H04B2215/067

5. 发明公开

EP0655829A1 Spread spectrum clock generator and associated method 失效
标题翻译： Tak g。er er er er er。。。。。。。。
公开(公告)号：EP0655829A1
公开(公告)日：1995-05-31
申请号：EP94308802.1
申请日：1994-11-29
申请人： LEXMARK INTERNATIONAL, INC.
发明人： Hardin, Keith B. , Fessler, John T. , Bush, Donald Reid , Booth, James Ronald
IPC分类号： H03C3/09 , H03B29/00
CPC分类号： H03C3/0966 , H03B29/00 , H03C3/0925 , H03C3/0941 , H03L7/0805 , H03L7/197 , H04B2215/064 , H04B2215/067
摘要： A clock circuit includes an oscillator (15) for generating a reference frequency signal, and a spread spectrum clock generator (14) cooperating with the oscillator for generating a spread spectrum clock output signal having a fundamental frequency and reduced amplitude EMI spectral components at harmonics of the fundamental frequency. The spread spectrum clock generator preferably includes a clock pulse generator for generating a series of clock pulses, and a spread spectrum modulator for frequency modulating the clock pulse generator to broaden and flatten amplitudes of EMI spectral components which would otherwise be produced by the clock pulse generator. The spread spectrum modulator frequency modulates the clock pulses with specific profiles of frequency deviation versus the period of the profile. Electronic devices including the spread spectrum clock circuit and associated method are also disclosed.
摘要翻译：时钟电路包括用于产生参考频率信号的振荡器（15）和与振荡器协作的扩展频谱时钟发生器（14），用于产生具有基频和降低的振幅EMI频谱分量的扩展频谱时钟输出信号，基本频率。扩频时钟发生器优选地包括用于产生一系列时钟脉冲的时钟脉冲发生器和用于对时钟脉冲发生器进行频率调制的扩展频谱调制器，以扩大和平缓由时钟脉冲发生器产生的EMI频谱分量的幅度。扩频调制器利用频率偏差的特性曲线与轮廓周期调制时钟脉冲。还公开了包括扩频时钟电路和相关方法的电子设备。

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