A voltage regulator includes two input pairs of opposite type transistors, p-type and n-type, to provide a soft-start functionality for gradually increasing the voltage regulator's output voltage from zero, or a voltage below the thresholds of the n-type transistors, to an operational voltage. The voltage regulator operates in a soft-start mode during which a variable input voltage signal is ramped up to allow the output voltage to reach the operational voltage, and a normal-operation mode during which the operational voltage is maintained.

A voltage regulator includes two input pairs of opposite type transistors, p-type and n-type, to provide a soft-start functionality for gradually increasing the voltage regulator's output voltage from zero, or a voltage below the thresholds of the n-type transistors, to an operational voltage. The voltage regulator operates in a soft-start mode during which a variable input voltage signal is ramped up to allow the output voltage to reach the operational voltage, and a normal-operation mode during which the operational voltage is maintained.

A novel approach for the control of AC power uses power MOSFETs in a bidirectional switch subcircuit configuration having an optically coupled, electrically floating control circuit that self-biases the switches into the on state and uses an optically coupled control element to force the switches into the off state. The time constant of the control circuit is fast enough to allow phase control as well as on-off control. A plurality of subcircuits can be easily cascaded to provide improved performance.

A novel approach for the control of AC power uses power MOSFETs in a bidirectional switch subcircuit configuration having an optically coupled, electrically floating control circuit that self-biases the switches into the on state and uses an optically coupled control element to force the switches into the off state. The time constant of the control circuit is fast enough to allow phase control as well as on-off control. A plurality of subcircuits can be easily cascaded to provide improved performance.

A voltage regulator includes two input pairs of opposite type transistors, p-type and n-type, to provide a soft-start functionality for gradually increasing the voltage regulator's output voltage from zero, or a voltage below the thresholds of the n-type transistors, to an operational voltage. The voltage regulator operates in a soft-start mode during which a variable input voltage signal is ramped up to allow the output voltage to reach the operational voltage, and a normal-operation mode during which the operational voltage is maintained.

A voltage regulator includes two input pairs of opposite type transistors, p-type and n-type, to provide a soft-start functionality for gradually increasing the voltage regulator's output voltage from zero, or a voltage below the thresholds of the n-type transistors, to an operational voltage. The voltage regulator operates in a soft-start mode during which a variable input voltage signal is ramped up to allow the output voltage to reach the operational voltage, and a normal-operation mode during which the operational voltage is maintained.

A power converter includes a buck leg circuit connected between a voltage input of the power converter and ground, a boost leg circuit connected between a voltage output of the power converter and ground, an inductor connected between the buck leg circuit and the boost leg circuit, an error amplifier configured to compare the voltage output of the power converter against a reference voltage to yield a feedback signal, and a control circuit. The control circuit is configured to generate a reference buck ramp configured to be compared against the feedback signal to determine whether to operate the buck leg circuit in buck mode, and to generate a reference boost ramp by superposing a variable boost ramp portion on to the reference buck ramp, the reference boost ramp configured to be compared against the feedback signal to determine whether to operate the boost leg circuit in boost mode.

A travel power adapter system includes a base unit and a plurality of adapter assemblies. The base unit provides an integral prong configuration associated with an intrinsic electrical plug standard. Each adapter assembly provides a prong configuration associated with a different extrinsic electrical plug standard. The base unit provides a base recess that the integral prong configuration can pivot into in a nested condition. Each adapter assembly provides coupling sleeves dimensioned to slidably receive, in a first direction, the plurality of prongs in the nesting condition, forming an operative association between the base unit and the prong configuration of the adapter assembly, enabling an electrical connection to a receptacle or socket associated with the extrinsic electrical plug standard. The adapter assembly provides a locking unit that engages a locking slot of the base recess, thereby preventing the adapter assembly unintentionally moving in the reverse first direction.

A travel power adapter system includes a base unit and a plurality of adapter assemblies. The base unit provides an integral prong configuration associated with an intrinsic electrical plug standard. Each adapter assembly provides a prong configuration associated with a different extrinsic electrical plug standard. The base unit provides a base recess that the integral prong configuration can pivot into in a nested condition. Each adapter assembly provides coupling sleeves dimensioned to slidably receive, in a first direction, the plurality of prongs in the nesting condition, forming an operative association between the base unit and the prong configuration of the adapter assembly, enabling an electrical connection to a receptacle or socket associated with the extrinsic electrical plug standard. The adapter assembly provides a locking unit that engages a locking slot of the base recess, thereby preventing the adapter assembly unintentionally moving in the reverse first direction.

The present disclosure relates to data communications. More specifically, the present disclosure relates to the generation of touch events on a capacitive touch-screen of an electronic device to communicate information to the electronic device. A method, apparatus, and system for using a user device to communicate with a touch-screen of an electronic device involves the token transmitting its identity (ID) directly through the touch-sensor by artificially modifying the effective capacitance between the touch-sensor and token surfaces. The electronic device receives the signal to identify the individual token.