发明申请
- 专利标题: PHASE SHIFTER WITH REDUCED LINEAR DEPENDENCY
- 专利标题(中): 具有减少线性关系的相位变换器
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申请号: US12412267申请日: 2009-03-26
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公开(公告)号: US20090187800A1公开(公告)日: 2009-07-23
- 发明人: Janusz Rajski , Jerzy Tyszer , Nagesh Tamarapalli
- 申请人: Janusz Rajski , Jerzy Tyszer , Nagesh Tamarapalli
- 主分类号: G01R31/3177
- IPC分类号: G01R31/3177 ; G06F11/25
摘要:
A method is disclosed for the automated synthesis of phase shifters—circuits used to remove effects of structural dependencies featured by pseudo-random test pattern generators driving parallel scan chains. Using a concept of duality, the method relates the logical states of linear feedback shift registers (LFSRs) and circuits spacing their inputs to each of the output channels. The method generates a phase shifter network balancing the loads of successive stages of LFSRs and satisfying criteria of reduced linear dependency, channel separation and circuit complexity.
公开/授权文献
- US07653851B2 Phase shifter with reduced linear dependency 公开/授权日:2010-01-26