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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
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.
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公开(公告)号：EP0419391A3
公开(公告)日：1992-08-19
申请号：EP90480103.2
申请日：1990-07-18
发明人： Beck, James Lee , Booth, James Ronald , Cole, Carl Price , Oliver, Lynn Marvin , Spina, Warren John , Troyer, Stephen Ray
CPC分类号： G06K15/00 , G06K15/128 , G06K2215/0065
摘要： A page printer which rasterizes a page utilizing partial page bit map swaths. Received data to be printed is stored in packets (12-17) in a page buffer in random access memory. Data within each packet is arranged in printing order down the page to be printed, but the packets themselves are arranged in the order received, and are not indexed or linked. As each swath (11) is rasterized, each packet is examined, and packets containing data falling at least in part within the active swath are processed. The printer is controlled by a programmed microprocessor, and logic hardware assistance is provided for translating data addresses from logical addresses to physical addresses. Logic hardware assistance is also provided for making the determination of whether or not a given data address lies within the active swath.
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公开(公告)号：EP0419391A2
公开(公告)日：1991-03-27
申请号：EP90480103.2
申请日：1990-07-18
发明人： Beck, James Lee , Booth, James Ronald , Cole, Carl Price , Oliver, Lynn Marvin , Spina, Warren John , Troyer, Stephen Ray
CPC分类号： G06K15/00 , G06K15/128 , G06K2215/0065
摘要： A page printer which rasterizes a page utilizing partial page bit map swaths. Received data to be printed is stored in packets (12-17) in a page buffer in random access memory. Data within each packet is arranged in printing order down the page to be printed, but the packets themselves are arranged in the order received, and are not indexed or linked. As each swath (11) is rasterized, each packet is examined, and packets containing data falling at least in part within the active swath are processed. The printer is controlled by a programmed microprocessor, and logic hardware assistance is provided for translating data addresses from logical addresses to physical addresses. Logic hardware assistance is also provided for making the determination of whether or not a given data address lies within the active swath.
摘要翻译： 页面打印机利用局部页面位图条幅栅格化页面。 接收到的要打印的数据以数据包（12-17）的形式存储在随机存取存储器的页面缓冲区中。 每个数据包内的数据按打印顺序排列在要打印的页面下，但数据包本身按收到的顺序排列，并且未被索引或链接。 当每个扫描条（11）被光栅化时，检查每个分组，并处理包含至少部分落在活动扫描条内的数据的分组。 打印机由编程的微处理器控制，并提供逻辑硬件辅助，用于将数据地址从逻辑地址转换为物理地址。 还提供逻辑硬件帮助，用于确定给定数据地址是否位于活动行区域内。
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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
CPC分类号： H03C3/0966 , H03B29/00 , H03C3/0925 , H03C3/0941 , H03L7/0805 , H03L7/197 , H04B2215/064 , H04B2215/067
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公开(公告)号：EP0419391B1
公开(公告)日：1996-05-08
申请号：EP90480103.2
申请日：1990-07-18
发明人： Beck, James Lee , Booth, James Ronald , Cole, Carl Price , Oliver, Lynn Marvin , Spina, Warren John , Troyer, Stephen Ray
CPC分类号： G06K15/00 , G06K15/128 , G06K2215/0065
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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
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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公开(公告)号：EP0160832B1
公开(公告)日：1991-09-18
申请号：EP85103927.1
申请日：1985-04-02
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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
CPC分类号： H03C3/0966 , H03B29/00 , H03C3/0925 , H03C3/0941 , H03L7/0805 , H03L7/197 , H04B2215/064 , H04B2215/067
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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
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。
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公开(公告)号：EP0160832A2
公开(公告)日：1985-11-13
申请号：EP85103927.1
申请日：1985-04-02
发明人： Aldrich, Charles Stanley , Booth, James Ronald , Schuller, William Martin , Young, Lloyd Phillip
摘要： A method of and apparatus for proportional ribbon (23) tracking on a printer including a printwheel (25), ribbon (23) and hammer all mounted on a carrierfortranslation opposite a platen (21). Ribbon lift mechanism (17,47) is provided for effecting elevation of ribbon (23) to multiple predetermined positions or tracks so that characters may be printed on print receiving medium (22). Input means (11) receives a character to be printed. The microprocessor (13), in conjunction with the ROM (15), characterizes the character in accordance with a predetermined plurality of characteristics. In accordance with ribbon lift and fed algorithms, a particular characteristic of the character to be printed is added to a position on the ribbon upon which at least one prior character has been printed. In this manner a new print position is determined. Thereafter, the new track print position is outputted to the ribbon lift and feed means (17,47,18) for effecting elevation of said ribbon (23) to one of a multiple of predetermined positions to thereby approximately maximize the number of predetermined positions of said ribbon with characters thereon which may be printed without character overlap.
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