A250电荷灵敏放大器的性能和设计制作

阐述了A250混合集成电荷灵敏放大器的特性、性能指标和应用,以及它的参数测量方法,给出了具体应用中设计的电路。

White Audio A250 后级放大器

White;白色?但除了商标是白色的以外,整个后级放大器都是黑色的！ 所以大家都认为刚成立不久的美国White Audio是一个相当有趣的公司,他们生产的诸如D35型这样的重量不足4.5kg的可以放在手掌上的后级,也生产现在我们正在谈论的象A250这样长达60cm以上,重得至少两个人才能搬动的大型后级放大器。 A250是White Audio所有放大器中输出功率最大的一款,8Ω时能输出250W。

Residual Nuclides Induced in Cu Target by a 250 MeV Proton Beam

Residual nuclide production is studied experimentally by bombarding a Cu target with a 250 MeV proton beam. The data are measured by the off-line γ-spectroscopy method. Six nuclides are identified and their cross sections are determined. The corresponding calculated results by the MCNPX and GEANT4 codes are compared with the experimental data to check the validity of the codes. A comparison shows that the MCNPX simulation has a better agreement with the experiment. The energy dependence of residual nuclide production is studied with the aid of MCNPX simulation, and it is found that the mass yields for the nuclides in the light mass region increase significantly with the proton energy.

试玩HTPC的DVI数字接口——DLP投影机的最佳拍档

AV玩家一向注重影音器材的最佳搭配,我虽算不上玩家,但跟众多的AV玩家一样,对家庭影院的完美效果有着执着的追求。而且我跟很多玩家一样有一个爱好,就是每当听说有什么新的玩法,总忍不住要尝试一番。前段时间看到有一篇文章报道:“DLP投影机的最佳搭档是HTPC(家庭影院PC)。利用HTPC输出高分辨率数字信号,与投影机DLP芯片点对点对应,绕开投影机的内置倍线器,可以达到或超过传统DVD机+数万元倍线器的效果。”为了一试新鲜,我和朋友一起作了一次全新的尝试。下面跟大家交流一下这次试玩的心得。