Among other things the ripple may be caused by SCR firing circuit imbalance. In critical applications, simply providing equally spaced SCR firing pulses, as is done in some all digital control schemes ...

Abstract: This paper proposed whole-chip all-directional ESD protection circuit design with RC LIGBT-based 12 V Power clamp and SCR-based 12 V I/O Clamp. The proposed ESD protection circuit is ...