A New Flip-Flop-Based Transient Power Supply Clamp for ESD Protection
A New Flip-Flop-Based Transient Power Supply Clamp for ESD Protection
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DOI：
10.1109/tdmr.2008.918984
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发表时间：
2008-06
影响因子：
2
通讯作者：
H. Sarbishaei;O. Semenov;M. Sachdev
中科院分区：
文献类型：
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作者：
H. Sarbishaei;O. Semenov;M. Sachdev
随着CMOS技术的规模化，设计对主电路透明的稳健静电放电（ESD）保护电路变得越来越具有挑战性。对于需要最小寄生电容的高频应用，二极管和箝位是一种流行的ESD保护方法。钳形设计的主要挑战是在整个ESD事件中保持钳形处于“开启”模式，同时最小化面积并避免误触发。在本文中，提出了一种新的钳位，它使用触发器来打开钳位，以完成ESD事件。触发电路能够使箝位保持超过2 μ s，并且该箝位通过3kv HBM ESD应力。仿真结果表明，该箝位不受误触发和电源噪声的影响。此外，解决了夹具的稳定性问题，并证明了新夹具具有抗振荡能力。
As CMOS technology is scaled, the design of a robust electrostatic-discharge (ESD) protection circuit that is transparent to the main circuit is becoming more challenging. For high- frequency applications where minimum parasitic capacitance is required, diodes along with clamps are a popular ESD protection method. The main challenge in the clamp design is to keep the clamp in "on" mode for the whole ESD event while minimizing area and avoiding false triggering. In this paper, a new clamp that uses a flip-flop to turn on the clamp for the complete ESD event is presented. The trigger circuit is able to keep the clamp on for over 2 mus, and this clamp passes a 3-kV HBM ESD stress. Simulation results show that this clamp is immune to false triggering and power supply noise. Furthermore, the stability problem in clamps is addressed, and the new clamp is shown to be immune to oscillation.