硅工艺技术不断地取得进展,以致硅器件能够与昂贵的GaAs器件匹敌,甚至取而代之。意大利卡塔尼亚大学和卡塔尼亚的STMicroelec-tronics公司的研究人员开发出用于卫星数字视频广播的12GHz硅双极双变频接收机集成电路。这种超外差接收机集成电路采用了一个集成于同一硅双极芯片上 Silicon process technology continues to make progress so that silicon devices can compete with expensive GaAs devices, or even replace them. Researchers at the University of Catania in Italy and STMicroelec-tronics in Catania have developed 12GHz silicon bipolar dual-frequency receiver ICs for satellite digital video broadcasting. This superheterodyne integrated circuit uses a single integrated silicon bipolar chip