Abstract: An analog circuit of a microcontroller includes a switch that is coupled in series with a capacitor of the analog circuit. During nominal power mode operation, an operational voltage is present on the capacitor. The switch is conductive so that the capacitor is switched into the analog circuit and so that the capacitor operates as part of the analog circuit. At the beginning of sleep mode operation, the switch is made nonconductive thereby effectively switching the capacitor out of the analog circuit and storing the operational voltage on the capacitor. When the analog circuit is powered up again after sleep mode operation, the switch is made conductive to switch the capacitor back into the analog circuit. Because the capacitor still holds a substantial voltage, analog circuit wake up time is reduced because the time required to charge the capacitor up to its operational voltage is reduced.

Abstract: A pair of series connected high power MOS transistors, each including a plurality of transistors formed on a single chip in parallel, with a control circuit including a pair of logic gates connected to different points of the control electrodes of the power transistors so that one of the power transistors is turned on in response to a control signal input only after the other power transistor is turned completely off.