Automatic voltage switching circuit for selecting a higher voltage of multiple supply voltages to provide as an output voltage

摘要: Automatic voltage switching circuits for providing a higher of multiple supply voltages are disclosed. In one aspect, an automatic circuit (100) is configured to generate compare signal (116) indicating which first (104) and second (106) voltage. The further select signals (122) based on the (116), wherein in domain Transistors (124, 126) corresponding control output (102) response (122). Biasing back-gates transistors using reduces or avoids forward biasing body diodes 126), thus reducing possibility causing interference power non-activated transistor.