零静态电流,延时可调,通电复位电路

R. Prakash
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引用次数: 15

摘要

上电复位(POR)电路在数字和混合信号集成电路中非常重要。它用于在上电时初始化芯片内部数字电路的关键节点。提出并演示了一种具有零静态电流和可调延迟的新型POR电路。该电路采用0.5μm CMOS工艺设计,工作电压范围为1.8V至5.5V。在电源电压超过预定义的阈值电压后,电路在预定的延迟后产生POR信号。这种延迟可以通过可编程保险丝增加或减少。POR阈值不依赖于供应斜坡率。该电路的断电(BO)电压与IC内部数字电路所需的最小电源电压相匹配。该电路消耗零稳态电流,非常适合低功耗应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Zero quiescent current, delay adjustable, power-on-reset circuit
A power-on-reset (POR) circuit is extremely important in digital and mixed-signal ICs. It is used to initialize critical nodes of digital circuitry inside the chip during power-on. A novel POR circuit having zero quiescent current and an adjustable delay is proposed and demonstrated. The circuit has been designed in 0.5μm CMOS process to work for a supply voltage ranging from 1.8V to 5.5V. The circuit generates a POR signal after a predetermined delay, after the supply voltage crosses a predefined threshold voltage. This delay can be increased or decreased via programmable fuses. The POR threshold does not depend upon the supply ramp rate. The Brown-Out (BO) voltage for the proposed circuit matches the minimum supply voltage required by the digital circuitry inside the IC. The circuit consumes zero steady state current, making it ideal for low power applications.
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