Abstract: A level shifter, converting an input signal into an output signal for level shifting, including a leakage blocking circuit having cascaded P-channel transistors and one N-channel transistor. The P-channel transistor at a beginning stage provides a gate for receiving the input signal and a source coupled to a gate of the P-channel transistor at a secondary stage. At intermediate stages, each P-channel transistor provides a source coupled to a gate of the subsequently cascaded P-channel transistor. At a final stage, the P-channel transistor provides a source coupled to a voltage source and a drain coupled to an output terminal of the leakage blocking circuit for the outputting of the output signal. The N-channel transistor has a gate which is coupled to receive the input signal as well, a source coupled to a common voltage, and a drain coupled to the output terminal of the leakage blocking circuit.

Abstract: A level shifter, converting an input signal into an output signal for level shifting, including a leakage blocking circuit having cascaded P-channel transistors and one N-channel transistor. The P-channel transistor at a beginning stage provides a gate for receiving the input signal and a source coupled to a gate of the P-channel transistor at a secondary stage. At intermediate stages, each P-channel transistor provides a source coupled to a gate of the subsequently cascaded P-channel transistor. At a final stage, the P-channel transistor provides a source coupled to a voltage source and a drain coupled to an output terminal of the leakage blocking circuit for the outputting of the output signal. The N-channel transistor has a gate which is coupled to receive the input signal as well, a source coupled to a common voltage, and a drain coupled to the output terminal of the leakage blocking circuit.

Abstract: Methods, devices, and systems for charging a battery in a mobile device are provided. For example, in one embodiment, among others, a battery charging system includes a monitoring circuit configured to monitor a battery and generate a sense current. The battery charging system further includes a comparing circuit configured to compare a reference current and the generated sense current. The comparing circuit is further configured to generate a comparison signal. Also, the battery charging system further includes a control circuit configured to control a level of a charging current applied to the battery based on the comparison signal.

Abstract: Methods, devices, and systems for charging a battery in a mobile device are provided. For example, in one embodiment, among others, a battery charging system includes a monitoring circuit configured to monitor a battery and generate a sense current. The battery charging system further includes a comparing circuit configured to compare a reference current and the generated sense current. The comparing circuit is further configured to generate a comparison signal. Also, the battery charging system further includes a control circuit configured to control a level of a charging current applied to the battery based on the comparison signal.