OFDM系统中FFT处理器的版图设计

Layout design of FFT processor for OFDM system

用Astro工具设计FFT处理器版图流程.在设计FFT处理器版图过程中,采用新的电源网络设计方法进行电源/地Pad数量、电源环和电源条设计,采用布线前设定高层跳线方式和布线后插入保护二极管方式消除天线效应,通过整个版图设计过程防止串扰效应实现串扰不超过设定的阈值,并对布局阻塞违规和布线违规提出解决办法.实现了满足时序和制造工艺要求的FFT处理器版图,达到项目设定的各项性能指标要求.

Introduces layout design flow of FFT processor based on Astro. In the FFT processor layout design, from researching the new method of power network design to designing the power/ground pad number, power ring and power strap. By setting to jump the wire with a higher - layer metal before routing and inserting diode after routing, the antenna effect is chminated. The crosstalk is considered at each stage of the whole layout design, which must be controled in the threshold. The issue about Place block and routing violations is solved. The FFT processor layout meets the demand timing and technology and the whole system reaches the target.