Patent application number | Description | Published |
20150032908 | USING USB SIGNALING TO TRIGGER A DEVICE TO ENTER A MODE OF OPERATION - A method of triggering a desired operating mode in a universal serial bus (USB)-compatible client device is provided. A USB-compatible client device detects that it has been coupled to a USB-compatible host device via a USB bus. The USB-compatible client device attempts to pull a data line of the USB bus high. The USB-compatible client device then ascertains that the data line remains pulled low, thereby indicating that the USB-compatible client device should enter a first mode of operation. The USB-compatible client device operates according to the first mode of operation. | 01-29-2015 |
20150032909 | USING USB SIGNALING TO TRIGGER A DEVICE TO ENTER A MODE OF OPERATION - A method of triggering a desired operating mode in a universal serial bus (USB)-compatible client device is provided. A USB-compatible client device detects that it has been coupled to a USB-compatible host device via a USB bus. The USB-compatible client device attempts to pull a data line of the USB bus high. The USB-compatible client device then ascertains that the data line remains pulled low, thereby indicating that the USB-compatible client device should enter a first mode of operation. The USB-compatible client device operates according to the first mode of operation. | 01-29-2015 |
20150137791 | DEVICES AND METHODS FOR FACILITATING USB CHARGER DETECTION - Electronic devices are adapted to facilitate detection of a type of USB charger to which an electronic device is connected. According to one example, an electronic device can apply a current source to a data line of a USB plug coupled to a USB port. A determination can be made whether the data line has gone to a LOW state or remained at a HIGH state after a predetermined period of time. If the data line has gone to a LOW state, the USB port may be identified as a downstream port, such as a standard downstream port (SDP) or a charging downstream port (CDP). If the data line has remained at the HIGH state, the USB port may be identified as a dedicated charging port (DCP), no matter if it is compliant or non-compliant with the BC 1.2 spec. Other aspects, embodiments, and features are also included. | 05-21-2015 |
20150301539 | BAND-GAP CURRENT REPEATER - A series of current repeaters with localized feedback is provided. Each current that precedes a subsequent current repeater in the series is configured to receive a feedback current from the subsequent current repeater and generate an error signal accordingly with a differential amplifier so as to reduce current repetition errors that would otherwise result from an offset voltage in the differential amplifier. | 10-22-2015 |
20150311875 | SENSE AMPLIFIER WITH IMPROVED RESOLVING TIME - Sense amplifiers that can provide improved resolving times can be used, for example, in clock and data recovery circuits. The sense amplifiers sense the value of a differential input signal using a latch circuit and then, after an initial sensing time, force the latch circuit to resolve a digital value that corresponds to the value of the input signal. An implementation of the sense amplifies uses a first latch with cross-coupled inverters that produce set and reset signals. A transistor pair couples the differential input signal to the cross-coupled inverters via a switch to ground. A discharge path circuit arranged to accelerate the resolving of the latch circuit is also coupled to the cross-coupled inverters. The discharge path can be enabled after an initial sensing time. | 10-29-2015 |
20150363349 | LINK LAYER TO PHYSICAL LAYER (PHY) SERIAL INTERFACE - A link layer to physical layer (PHY) serial interface is disclosed. In one aspect, a system on a chip (SoC) integrated circuit (IC) includes a link layer circuit, and a remote IC includes a Universal Serial Bus (USB) PHY circuit. A bus having four or fewer wires connects the two ICs. A link bridge communicates with the link layer circuit and serializes USB Transceiver Macrocell Interface (UTMI) signaling received from the link layer circuit as high speed (HS) USB messages for transmission to the remote IC. The link bridge also receives HS messages from the USB PHY circuit on the remote IC. The link bridge deserializes the HS messages to extract UTMI signaling and passes the extracted UTMI signaling to the link layer circuit. | 12-17-2015 |
20150378418 | SYSTEMS AND METHODS FOR CONSERVING POWER IN A UNIVERSAL SERIAL BUS (USB) - Systems and methods for conserving power in a universal serial bus (USB) are disclosed. In one aspect, when a USB device enters a low power mode (e.g., U1 or U2), a clock associated with the USB device is modified to also enter a low power mode. Since the PIPE interface associated with the USB device still requires a clock signal, the low power clock mode must still be able to provide the PIPE interface with a clock signal. However, the clock signal to the PIPE interface does not need to be the same frequency or accuracy as the clock signal used by the USB interface. The modification to the clock changes the clock frequency to a low frequency compared to the normal clock frequency. By using a low frequency clock for the PIPE interface, power is conserved while preserving the functionality of the PIPE interface. | 12-31-2015 |