Abstract: A switch controller has a charge pump, a selector switch connected to the charge pump, and a pre-charge power supply input connectable to the input of the selector switch. For each of the output channels being controlled, a power control switch is connected to an output of the selector switch. In response to commands, output channels are enabled and disabled, causing corresponding actions in the power control switches. When an output channel is to be activated, the output channel is selected by the selector switch and the pre-charge power supply connected to the input of the selector switch. The charging is completed by the charge pump and the enabled status of the power control switch is maintained by the charge pump.

Abstract: A switch controller has a charge pump, a selector switch connected to the charge pump, and a pre-charge power supply input connectable to the input of the selector switch. For each of the output channels being controlled, a power control switch is connected to an output of the selector switch. In response to commands, output channels are enabled and disabled, causing corresponding actions in the power control switches. When an output channel is to be activated, the output channel is selected by the selector switch and the pre-charge power supply connected to the input of the selector switch. The charging is completed by the charge pump and the enabled status of the power control switch is maintained by the charge pump.

Abstract: A Universal Serial Bus transmitter comprising a USBTXP input and a USBTXM input for receiving respective data signals, and a USBP driver and a USBM driver for applying the respective data signals to USBP and USBM wires respectively. The transmitter comprises a transmit signal generator responsive to an asserting edge of a signal at one of the USBP and USBM inputs to define a leading edge of a transmit signal (USBTXIP) and to a corresponding de-asserting edge of a signal at the other of the USBP and USBM inputs to define the subsequent trailing edge of said transmit signal (USBTXIP). Even if the duty cycles of the input signals USBTXP and USBTXM are substantially different from 50%, this does not cause unacceptable jitter of successive crossover points nor cause the crossover point voltage level to be outside the USB tolerance, centred on 50% of the voltage swings of the USBP and USBM signals.

Abstract: A high-speed voltage regulating apparatus and a method for high-speed voltage regulation. The apparatus includes: (A) a regulator, adapted to provide a regulated voltage; (B) switching circuitry, connected to the regulator, adapted to either (i) connect the regulator to an output node or (ii) disconnect the regulator from the output node; whereas the output node is connected to a dynamic power consuming device and to a load capacitor; (C) control logic, connected to the regulator, adapted to receive at least an indication reflecting a voltage of the output node and to control the switching circuitry such that the regulator is disconnected from the output node to facilitate a decrease in the voltage of the output node.

Abstract: A Universal Serial Bus transmitter comprising a USBTXP input and a USBTXM input for receiving respective data signals, and a USBP driver and a USBM driver for applying the respective data signals to USBP and USBM wires respectively. The transmitter comprises a transmit signal generator responsive to an asserting edge of a signal at one of the USBP and USBM inputs to define a leading edge of a transmit signal (USBTXIP) and to a corresponding de-asserting edge of a signal at the other of the USBP and USBM inputs to define the subsequent trailing edge of said transmit signal (USBTXIP). Even if the duty cycles of the input signals USBTXP and USBTXM are substantially different from 50%, this does not cause unacceptable jitter of successive crossover points nor cause the crossover point voltage level to be outside the USB tolerance, centred on 50% of the voltage swings of the USBP and USBM signals.