Invention Application
WO1996021183A1 DIGITAL RANDOMIZER FOR ON-CHIP GENERATION AND STORAGE OF RANDOM SELF-PROGRAMMING DATA BLOCK 审中-公开
用于片上生成和存储随机自编程数据块的数字随机

DIGITAL RANDOMIZER FOR ON-CHIP GENERATION AND STORAGE OF RANDOM SELF-PROGRAMMING DATA BLOCK
Abstract:
A randomizer system (10) generates an undeterministic data block using standard cell library units and includes a random number generator (20). The generator includes at least two metastable blocks that each include a plurality of D-type flip-flops. Each flip-flop is coupled to a dedicated free-running oscillator and common jitter clock. The flip-flops are thus forcibly operated in a metastable state by intentionally violating the flip-flop set-up or hold time margins of incoming data related to the jitter clock. The flip-flop outputs are exclusively "OR"d and then passed through first and second shift registers of uneven and preferably even and odd bit lengths. The input from each shift register is then EX-OR'd and clocked out with a system clock to provide first and second channels of undeterministic data.
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