中文摘要：

位处理单元（BMU）是定点数字信号处理器（DSP）中主要的运算单元。数字信号处理器要做大量的位处理的运算，因此该单元的设计极大地影响着DSP的性能。用全定制的方法设计用于定点DSP的位处理单元。该电路具有逻辑/算术移位、指数提取、归一化等功能，有效地解决了定点DSP的浮点运算功能。该BMU在CSMC0．5μmCMOS工艺下实现，一共包含4527个晶体管，资源消耗较少，在5V工作电压下，工作速度达到了114MHz，符合高性能DSP的要求。

英文摘要：

Bit Manipulation Unit（BMU） is the main arithmetic unit of the fixed - point Digital Signal Processor（DSP）. The design of BMU will significantly influence the performance of the DSP accounting for large amount of bit manipulation of DSP. A design of Bit Manipulation Unit is presented in the paper for fixed - point DSP which is accomplished by the way of all - custom. It implements logical/arithmetic shifting, exponent extracting and normalization, and can solve the floating point calculation for fixed - point DSP effectively. The BMU is implemented, with CSMC. 5 CMOS technology. There are 4 527 transistors in all,consuming few resources, The speed can achieve 114 MHz with 5 V supply voltage,conforming to the high performance DSP,