Abstract: A dual-output voltage regulator is disclosed, which provides a first terminal voltage and a second terminal voltage to DDR DRAM. The dual-output voltage regulator comprises a first regulator unit for receiving an input voltage and providing the first terminal voltage via a first transistor unit; and a second regulator unit for receiving the input voltage and the first terminal voltage in order to output the second terminal voltage, wherein the second terminal voltage is half of the first terminal voltage.

Abstract: A voltage regulator for providing a bidirectional current and a regulated voltage to a load. The voltage regulator regulates the output voltage at one half the level of the input voltage using a voltage doubler circuit in reverse. The regulator provides current to the load when the output voltage drops and receives current from the load when the output voltage rises. The voltage regulator is particularly suited to supplying a termination voltage to multiple line drivers in a DDR DRAM system, where the line drives require an active termination voltage to reduce power. Additionally, a pair of linear regulators, one for clamping the output voltage at a predetermined low voltage level and for supplying additional current demanded by the load, and the other for clamping the output voltage at a predetermined high voltage level and for receiving additional current supplied by the load, is included.

Abstract: A circuit mounted in a housing of a connector for ensuring that the connector safely transmits an electric power provided by a first power source to a power-receiving device is provided. The circuit includes a sensor and a switch. The sensor is used for sensing a first electric signal released from the power-receiving device and a second electric signal from a second power source disposed in the connector respectively, and generating a first control signal and a second control signal correspondingly. The switch is used for switching on/off a communication channel between the first power source and the power-receiving device in response to the first control signal and the second control signal respectively.

Abstract: A built-in back-up power device operates a high-power apparatus for a short time period to prevent the loss of data or damage to the apparatus when power from a utility power source is interrupted. The built-in back-up power device includes a battery and a charger. The charger charges the battery when power is provided from the utility power source. During a power interruption or outage, the battery outputs back-up power to the high-power apparatus. A computer with such a built-in back-up power device is also provided.