Invention Grant
US08681461B2 Selective current pumping to enhance low-voltage ESD clamping using high voltage devices 有权
选择性电流泵浦,以增强使用高压器件的低压ESD钳位

Selective current pumping to enhance low-voltage ESD clamping using high voltage devices
Abstract:
Some embodiments relate to an electrostatic discharge (ESD) protection device to protect a circuit from an ESD event. The ESD protection device includes first and second trigger elements. Upon detecting an ESD pulse, the first trigger element provides a first trigger signal having a first pulse length. The second trigger element, upon detecting the ESD pulse, provides a second trigger signal having a second pulse length. The second pulse length is different from the first pulse length. A primary shunt shunts power of the ESD pulse away from the ESD susceptible circuit based on the first trigger signal. A current control element selectively pumps current due to the ESD pulse into a substrate of the primary shunt based on the second trigger signal.
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