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电子业是香港最大的出口产业,占香港2004年总出口的45%,其中,零组件的出口占香港电子产业出口的1/3,主要为电脑零件、大量的集成电路以及微控制器等元器件。2005年1月-7月,香港电子产品的出口量与同期相比增长了17%。其主要出口产品分为三大类:音频视频、IT设备及IC,在2005年的增长分别为10%、35%和11%。与同期相比,对美国的出口量增长了10%,对欧洲的出口量增长了23%,而对于中国内陆的出口则增长了20%。 相似文献
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1 2008年全球通信设备产业及政策特点
1.1新兴市场成为2008年全球通信设备产业增长引擎
2008年,新兴市场通信设备需求的高速增长引人注目。根据Gartner公司数据,不含终端全球电信设备市场达到销售收入995.2亿美元,同比增长5.1%。其中,收入占43%的拉美、中东非洲、亚太地区(不含日本)等新兴地区的增长快速,2008年增速达到8.7%,成为带动增长的重要力量。收入占57%的北美、西欧、中东欧以及日本等传统主要区域市场,2008年增速仅为2.5%。 相似文献
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《数字通信世界》2008,(3):92-92
2月15日,亚信公司对外宣布了截止2007年12月31日的第四季度及年度财报。财报显示,亚信2007年第四季度总收入达4080万美元,同比增长27%,环比增长26%。毛利率为48%,去年同期为42%,上一季度为50%。毛利润占净收入的56%,去年同期为54%,上一季度为55%。毛利润占净收入的百分比在过去几个季度保持稳定。亚信第四季度净收入达3510万美元,超过预期,同比增长38%,环比增长19%。亚信2007年第四季度运营利润为500万美元,同比增长253%,环比增长60%。这一增长主要是由于收入和运营利润的增长。第四季度运营利润占净收入14%,去年同期为6%,上一季度为11%。 相似文献
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自全球金融危机以来,中国的经济增长愈加依赖投资增长。2009~2013年资本形成总额在GDP中的比重平均为47.8%,明显高于2004~2008年间的均值42.3%。根据我们的测算,2000~2008年中国的资本存量与GDP的比率保持相对稳定(230%左右),2008年后大幅上升,到2013年已达到275%。市场普遍认为如此高的投资增速是无法持续的。雪上加霜的是,投资高速增长的同时伴随着投资回报率的大幅下滑。在本文中,我们从三个指标说明中国劳动生产率的下滑,以及可能的解决方案。 相似文献
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Switching has been observed in metal?thin-insulator?n-p+ structures, where the thin insulator is SiO2, or polycrystalline silicon. In this letter two alternative structures are discussed in which the n-p+ junction is replaced by a Schottky barrier. In the second device proposed two thin-insulator structures back-to-back are shown to exhibit bidirectional switching. 相似文献
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A new non-volatile memory device is reported. This device is a GaAs m.o.s.f.e.t. with charge storage in the gate in which is a double oxide structure of aluminium oxide and GaAs native oxide, both oxides are grown anodically. The fabrication of the device is described and the results of initial measurements on the charging and charge retention properties are presented. 相似文献
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Low-noise amplifiers for u.h.f. colour t.v. broadcasting translator use have been successfully developed by using 1 ?m gate GaAs m.e.s.f.e.t.s. The obtained performances revealed that a GaAs m.e.s.f.e.t. has low-noise and low intermodulation distortion characteristics, even in the 500?800 MHz frequency range, compared with a Si bipolar transistor. 相似文献
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An experimental study of the low-frequency-noise properties of n-channel epitaxial silicon films on insulator m.o.s. s.o.s. transistors has been performed. The measurements show an excessive noise contribution at drain voltages corresponding to the current-kink effect for temperatures ranging from 4.2 to 300 K. 相似文献
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The optimum noise figures of an m.o.s.f.e.t. at u.h.f. and at pinch-off are calculated using a simplified equivalent circuit. The noise parameters are also determined experimentally. Theory and experiment are shown to be in good agreement. Noise parameters of the m.o.s.f.e.t. for the frequency range 0.1?0.8 GHz are given. 相似文献
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A new monolithic current-controlled oscillator (c.c.o.) has been realised in a j.f.e.t.-bipolar technology. Its main advantages are a highly-linear seven decade frequency range and easy temperature compensation for frequency and output voltage. 相似文献
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《Electronics letters》1967,3(12):550-551
In this letter, the use of the Gunn device as a broadband negative resistance, somewhat analogous to a tunnel diode, is explored. v.h.f. and u.h.f. oscillators are described; the frequency is determined by an external resonant circuit and is very nearly independent of the parameters of the Gunn-effect sample. 相似文献
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N-channel silicon m.o.s. transistors for h.f. power applications have been fabricated which are optimised for linear amplification. These devices exhibit 2 W output power and 11 dB power gain at 630 MHz in class-A operation. The intercept point for third-order intermodulation distortion is 48dBm, which is considerably more than the same data obtainable with bipolar transistors. 相似文献
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Novel configurations using a differential-voltage-controlled current source, differential-voltage-controlled voltage source (d.v.c.c.s./d.v.c.v.s.) as the active building block are described. The configurations assume that the active building block is divided into two independent parts initially. 相似文献
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By using plasma c.v.d. and lift-off, an n-channel m.o.s.f.e.t. with effective channel length of 0.4 ?m has been fabricated. Its main fabrication processes and obtained electrical characteristics are described. 相似文献