Spread spectrum clock generation
    85.
    发明授权
    Spread spectrum clock generation 有权
    扩频时钟产生

    公开(公告)号:US07590163B1

    公开(公告)日:2009-09-15

    申请号:US11437311

    申请日:2006-05-19

    IPC分类号: H04B1/69 H03L7/08

    摘要: There is provided a method of modifying a first clock to generate a second clock with reduced electromagnetic interference (EMI). The method comprises receiving the first clock, generating an upslew modulation form during an upslew frequency transition, generating a downslew modulation form during a downslew frequency transition, modulating a frequency of the first clock over a period of time using the upslew modulation form and the downslew modulation form to generate the second clock, and wherein the upslew modulation form and the downslew modulation form are different. The upslew modulation form and the downslew modulation form are defined by upslew modulation values and downslew modulation values, respectively, and the method further comprises receiving the upslew modulation values and the downslew modulation values, and generating fractional upslew modulation values and fractional downslew modulation, respectively, for modulating the frequency of the first clock.

    摘要翻译: 提供了一种修改第一时钟以产生具有降低的电磁干扰(EMI)的第二时钟的方法。 该方法包括接收第一时钟,在上行频率转换期间产生上行调制形式,在下降频率转换期间产生下降调制形式,使用上行调制形式和下降调制一段时间内的第一时钟的频率 调制形式产生第二时钟,并且其中上行调制形式和下降调制形式不同。 上升调制形式和下降调制形式分别由上行调制值和下降调制值定义,并且该方法还包括分别接收上行调制值和下降调制值,并分别产生分数上升调制值和分数下降调制 ,用于调制第一个时钟的频率。

    Modified resins for blown film
    87.
    发明申请
    Modified resins for blown film 有权
    用于吹塑薄膜的改性树脂

    公开(公告)号:US20090156773A1

    公开(公告)日:2009-06-18

    申请号:US12002560

    申请日:2007-12-17

    IPC分类号: C08F210/00

    摘要: Processes for enhancing blown film processability and the blown films formed thereby are described herein. One embodiment of the processes generally includes providing a first propylene based heterophasic copolymer having a first melt flow rate, modifying the first propylene based heterophasic copolymer to form a second heterophasic polymer having a second melt flow rate, wherein the second melt flow rate is greater than the first melt flow rate, contacting the first heterophasic polymer, the second heterophasic copolymer or a combination thereof with a plurality of additives, wherein the plurality of additives include a nucleator, polyethylene and mineral oil to form a modified heterophasic copolymer and blowing the modified heterophasic polymer into a film.

    摘要翻译: 本文描述了用于提高吹塑薄膜加工性能的方法和由此形成的吹塑薄膜。 该方法的一个实施方案通常包括提供具有第一熔体流动速率的第一丙烯基多相共聚物,修饰第一基于丙烯的多相共聚物以形成具有第二熔体流动速率的第二异相聚合物,其中第二熔体流动速率大于 所述第一熔体流动速率,使所述第一多相聚合物,所述第二多相共聚物或其组合与多种添加剂接触,其中所述多种添加剂包括成核剂,聚乙烯和矿物油,以形成改性的多相共聚物,并将所述改性的异相 聚合物成膜。

    Voice amplifier for mask
    90.
    发明授权
    Voice amplifier for mask 失效
    面罩语音放大器

    公开(公告)号:US07394905B2

    公开(公告)日:2008-07-01

    申请号:US10810946

    申请日:2004-03-26

    IPC分类号: H04R27/04

    CPC分类号: H04R1/025

    摘要: A voice amplifier for attachment to a mask has a sound reflector that faces outwardly of the mask when the voice amplifier is attached to the mask. A speaker faces inwards towards the sound reflector. Sound waves emanate from the speaker inward towards the sound reflector, reflect off the sound reflector and exit the voice amplifier through an outer peripheral gap and travel outwardly from the mask. The voice amplifier has an on/off switch mounted on the front of the voice amplifier. The voice amplifier cover has a front wall with a front surface facing away from the mask. The narrow end of the speaker is located closer to the front wall of the cover than the wide end. The cover front wall follows the profile of the speaker in a direction from the narrow end to the wide end of the speaker.

    摘要翻译: 用于附接到掩模的语音放大器具有当声音放大器附接到掩模时面向面罩外部的声音反射器。 扬声器向内朝向声音反射器。 声音从扬声器向内朝向声音反射器发出,反射出声音反射器并通过外围间隙离开语音放大器,并从面罩向外移动。 语音放大器具有安装在语音放大器前面的开/关开关。 声音放大器盖具有前壁,其前表面背离掩模。 扬声器的窄端比宽端更靠近盖的前壁。 盖前壁沿着从扬声器的窄端到宽端的方向跟随扬声器的轮廓。