随着便携式多媒体系统设计师将电池寿命推向极限,他们正把前所未有的时间花在研究不同硅供应商提供的功耗数据上。以牙还牙式的比较通常是困难的,因为变量实在是太多了,而且竞争器件之间的关键差异常常远不是那么明显。音频输入和输出子系统尤其困难,因为它们同时包含模拟和数字电路,而且通常需 As portable multimedia system designers push battery life to the limit, they are spending an unprecedented amount of time researching power consumption data from different silicon vendors. It is often difficult to compare teeth, since variables are too much, and the key differences between competing devices are often far less obvious. Audio input and output subsystems are particularly difficult because they contain both analog and digital circuitry and often require