MULTIPLE POWER SUPPLY BETA-SQUARED ESD CIRCUIT PROTECTION
Original Publication Date: 1996-Nov-01
Included in the Prior Art Database: 2002-May-07
In the next generations of new analog/digital high drive/fan-out circuits, multiple power supply buses have been required to reduce coupling noise or to provide for external power supply filters. This paper provides a means to reduce the impact of these multiple power supplies on the ESD performance of the device. The key element of the disclosure pro- vides what is called the ESD Power Rail. The ESD Power Rail (EPR) provides a common path for all power supply rails such as the analog, digital, and output (x) power supplies to the substrate. The fol- lowing diagram illustrates how a prior multiple power supply connection may have been done and how with this disclosure improves the circuit.