Methods and apparatus to bias a backgate of a power switch while preventing latchup are disclosed. A disclosed method of biasing a backgate of a power switch comprises: if a voltage of a first power supply rises before a voltage of a second power supply, initially biasing the backgate with a voltage...http://www.google.com/patents/US7202729?utm_source=gb-gplus-sharePatent US7202729 - Methods and apparatus to bias the backgate of a power switch
