目前传统RISC芯片(CMOS工艺)的时钟频率最高已达到40MHz,速度为25～30MIPS。如再进一步提高性能已越来越困难。因此Motorola、SUN、MIPS等公司已开始采用Bipolar/Bicmos工艺技术来制造新一代的RISC芯片,缩写为BRI-SC。其中Bipolar工艺主要是指ECL(射极耦合逻辑电路)。SUN公司目前已宣布80～100MHz,50～60MIPS的ECL RISC,并准备在1990年内推 The current traditional RISC chip (CMOS technology) clock frequency up to 40MHz, the speed of 25 ~ 30MIPS. As to further improve the performance has become increasingly difficult. Therefore, Motorola, SUN, MIPS and other companies have begun using Bipolar / Bicmos process technology to create a new generation of RISC chips, abbreviated as BRI-SC. Bipolar process which mainly refers to ECL (emitter-coupled logic circuit). SUN has now announced ECL RISC of 80 ~ 100MHz, 50 ~ 60MIPS, and is ready to push in 1990