Abstract: A low dropout regulator is disclosed. The low dropout regulator includes an amplifier, a transistor, and a selector. The transistor is coupled to the amplifier. The selector is coupled to the amplifier and the transistor. When a supply voltage value of the transistor is less than a supply voltage threshold value, a first path of the selector is selected and a first selector voltage value is transmitted by the selector to the transistor so as to fully conduct the transistor, and an output voltage value of the transistor is equal to the supply voltage value.

Abstract: A low dropout regulator is disclosed. The low dropout regulator includes an amplifier, a first transistor, a second transistor and a switch. When a supply voltage value of the low dropout regulator is less than a supply voltage threshold value, a first path of the switch is selected and a first switch voltage value is transmitted to the first transistor so as to fully conduct the first transistor, and an output voltage value of the low dropout regulator is equal to the supply voltage value. When the supply voltage value is not less than the supply voltage threshold value, a second path of the switch is selected and a second switch voltage value is transmitted to the first transistor so as to turn off the first transistor, and the output voltage value is adjusted by the second transistor and the amplifier.

Abstract: A low dropout regulator is disclosed. The low dropout regulator includes an amplifier, a first transistor, a second transistor and a switch. When a supply voltage value of the low dropout regulator is less than a supply voltage threshold value, a first path of the switch is selected and a first switch voltage value is transmitted to the first transistor so as to fully conduct the first transistor, and an output voltage value of the low dropout regulator is equal to the supply voltage value. When the supply voltage value is not less than the supply voltage threshold value, a second path of the switch is selected and a second switch voltage value is transmitted to the first transistor so as to turn off the first transistor, and the output voltage value is adjusted by the second transistor and the amplifier.

Abstract: A low dropout regulator is disclosed. The low dropout regulator includes an amplifier, a transistor, and a selector. The transistor is coupled to the amplifier. The selector is coupled to the amplifier and the transistor. When a supply voltage value of the transistor is less than a supply voltage threshold value, a first path of the selector is selected and a first selector voltage value is transmitted by the selector to the transistor so as to fully conduct the transistor, and an output voltage value of the transistor is equal to the supply voltage value.

Abstract: An off chip driving circuit includes a decision circuit, a first compensation circuit, a second compensation circuit, a pull-up circuit and a pull-down circuit. The decision circuit is configured to output a first decision signal and a second decision signal according to a clock and an input data. The first compensation circuit is coupled to the decision circuit and configured to generate a first control signal in response to the first decision signal and the second decision signal. The second compensation circuit is coupled to the decision circuit and configured to generate a second control signal in response to the first decision signal and the second decision signal. The pull-up circuit is configured to be enabled in response to the first control signal. The pull-down circuit is configured to be enabled in response to the second control signal.

Abstract: A system includes a first circuit, a second circuit and a regulator. The first circuit is configured to operate at a first operating voltage, wherein the first operating voltage drops by a first voltage level while the first circuit operates. The second circuit is coupled with the first circuit at a tap, and configured to operate at a second operating voltage. The regulator is configured to provide a supply voltage to the first circuit and the second circuit via the tap. The regulator is also configured to raise the supply voltage in response to the first voltage level.

Abstract: A system includes a regulator, a first circuit and a first sensing circuit. The regulator is configured to provide a supply voltage, and to raise the supply voltage based on a sensing result. The first circuit is configured to operate at a first operating voltage, which is derived from the supply voltage. The first sensing circuit, independent of the regulator, is configured to provide a first sensing result by sensing the first operating voltage provided to the first circuit, wherein the first sensing result serves as a first candidate for the sensing result, wherein the first sensing circuit in space of layout is closer than the regulator to the first circuit.

Abstract: A system includes a first circuit, a second circuit and a regulator. The first circuit is configured to operate at a first operating voltage, wherein the first operating voltage drops by a first degree while the first circuit operates. The second circuit is coupled with the first circuit at a tap, and configured to operate at a second operating voltage. The regulator is configured to provide a supply voltage to the first circuit and the second circuit via the tap. The regulator is also configured to raise the supply voltage in response to the first degree.

Abstract: A system includes a regulator, a first circuit and a first sensing circuit. The regulator is configured to provide a supply voltage, and to raise the supply voltage based on a sensing result. The first circuit is configured to operate at a first operating voltage, which is derived from the supply voltage. The first sensing circuit, independent of the regulator, is configured to provide a first sensing result by sensing the first operating voltage provided to the first circuit, wherein the first sensing result serves as a first candidate for the sensing result, wherein the first sensing circuit in space of layout is closer than the regulator to the first circuit.