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本文先讨论过去讲过的电流导引逻辑(current-routing logic)移位寄存器的工作范围,随后定性地讨论这个移位寄存器的改进线路。改进后的线路,不仅电性能上有很大改善,而且集成度也有很大改善,这是100％的消除了触发器收集极电阻耗费硅片面积的结果。用一个近似的触发器模型,计算这个线路的工作范围,并和未改进的线路进行比较。最后讨论改进线路的集成方式。对工作范围的测量和计算结果比较表明,这个近似的触发器模型,对了解移位寄存器的基本性能是足够的了。
This article first discusses the operating range of the current-routing logic shift register described in the past, followed by a qualitative discussion of the improved circuitry for this shift register. The improved circuit not only greatly improves the electrical performance but also greatly improves the integration, which is the result of 100% silicon area elimination by eliminating the trigger collector resistance. With an approximate trigger model, calculate the working range of this line, and compared with the unmodified line. Finally, discuss ways to improve the integration of the line. A comparison of the measurement of the operating range and the calculation results shows that this approximation of the trigger model is sufficient to understand the basic performance of the shift register.