TLE2141: amps

Hi,

the standard die fabrication process using vertical structures results in fast NPN transitors but slow PNP transistors. The excalibur process, on the other hand, uses a deeply submerged n-region as an artificial substrate in which a buried p-region becomes the collector. This gives the fast Excalibur PNP transistor.

Using PNP transistors is important in low noise OPAmps because PNP transistors show less noise compared to NPN transistors. Another benefit of using this fast Excalibur PNP transistor together with standard NPN transistors on die is a considerable decrease of supply current.

So, the Excalibur process helps to improve the noise and to decrease the supply current of OPAmp.

Kai