摘要:
A smart power adaptor and a method of controlling power supply thereof are provided. The smart power adaptor includes a power conversion circuit and a control unit. The power conversion circuit is configured to convert an alternating current (AC) power into a direct current (DC) power for providing to a load device. The control unit is coupled to the power conversion circuit. The control unit is configured to apply a corresponding power-supply control mean according to a power state through communication of a charging communication protocol of a battery module of the load device to control an operation of the power conversion circuit, so that the power conversion circuit uses different power conversion behaviors to generate the DC power in response to changing of the power status.
摘要:
A code tracking system and method especially for use in direct sequence code division multiple access (DS-CDMA) communication systems employs multiple timing references within a chip by tracking the multiple timing references relative to the exact midpoint of the chip, then adjusting the timing references to the exact midpoint of the chip, and outputting an error tracking signal in accordance with the minimum error associated with the multiple timing references. The system performs effective code tracking with low lock-loss rate even when the noise of a receiving path interferes with detection of some of the timing references. The system uses multiple delay-locked loops for the different timing references.
摘要:
A scalable server architecture for use in implementing scaled media servers capable of simultaneous real-time data stream retrieval for large numbers of subscribers. A scalable server includes a plurality of stream pumping engines each accessing a particular storage device of a storage subsystem, and a server processor which receives retrieval requests from subscribers and directs the stream pumping engines to retrieve the requested data streams. Each of the stream pumping engines may include a storage controller coupled to its corresponding storage device for directing retrieval of the requested stream therefrom, a network controller for supplying the retrieved stream to a client network, and a processor for directing the operation of the storage and network controllers. Each of the stream pumping engines may also include a shared memory accessible by the corresponding stream pumping engine processor and the server processor. The shared memory facilitates communication with other stream pumping engines via the server processor and server system bus. A scaled media server may be implemented by cross-connecting several scalable servers with a plurality of stream multiplexers. Each of the stream multiplexers can include a separate packet input unit for processing the packets of each media stream such that two distinct levels of transmission priority are provided and quality of server restrictions are satisfied for all streams.
摘要:
A reference power generating circuit and an electronic circuit using the same are provided. The reference power generating circuit includes a first bandgap reference circuit and a second bandgap reference circuit. The first bandgap reference circuit is biased by a power voltage to generate a first reference voltage, where the first reference voltage has a first offset. The second bandgap reference circuit is connected to the first bandgap reference circuit in series and receives the first reference voltage generated by the first bandgap reference circuit. The second bandgap reference circuit is biased by the first reference voltage to generate a baseline reference voltage. The baseline reference voltage has a second offset, and the second offset is smaller than the first offset.
摘要:
A method for power management in a communication system is disclosed. The communication system is capable of operating in a first mode, and comprises at least one device having first module corresponding to the first mode. The device can be configured to a normal mode or a power saving mode. First, map data is retrieved from frame data, in which the map data indicates a first time point corresponding to the first mode. Then, when the communication system operates in the first mode, the first module of the device is determined to be configured to the normal mode or the power saving mode according to the first time point.
摘要:
A system and method are provided for routing received cells through a switch fabric. A plurality of output channels are organized into a plurality of channel groups, wherein each of the channels groups is associated with one or more unique output ports of a Benes network. A plurality of cells destined to one or more of the plurality of channel groups is received at plural input queues. A different output port of the Benes network is selected for one or more of the input queues that contains a cell. Then, one cell is switched from each of one or more input queues through the Benes network to the respective selected output port.
摘要:
A current sensing module and a power conversion apparatus and an electronic apparatus using the same are provided. The current sensing module is suitable for detecting a first load current flowing through a first load. The current sensing module includes a sampling stage circuit and an output stage circuit. The sampling stage circuit couples across the first load and selectively exchanges coupling nodes between the sampling stage circuit and the first load by a multiplex switching means, so as to sample the first load current flowing along a first direction or a second direction, and thus generate a sampling signal. The output stage circuit is coupled to the sampling stage circuit and switches coupling nodes between the output stage circuit and the output terminal of the sampling stage circuit, so as to generate a current indication signal indicating the magnitude of the first load current according to the sampling signal.
摘要:
A current sensing module and a power conversion apparatus and an electronic apparatus using the same are provided. The current sensing module is suitable for detecting a first load current flowing through a first load. The current sensing module includes a sampling stage circuit and an output stage circuit. The sampling stage circuit couples across the first load and selectively exchanges coupling nodes between the sampling stage circuit and the first load by a multiplex switching means, so as to sample the first load current flowing along a first direction or a second direction, and thus generate a sampling signal. The output stage circuit is coupled to the sampling stage circuit and switches coupling nodes between the output stage circuit and the output terminal of the sampling stage circuit, so as to generate a current indication signal indicating the magnitude of the first load current according to the sampling signal.
摘要:
A transmission method executed in a multiple input multiple output wireless communication system may include the following steps: receiving a transmitting bit sequence; providing an X level pulse amplitude modulation (X-PAM) signal set, wherein distances between any two adjacent signal points in the X-PAM are the same; generating M signal sets according to the X-PAM signal set, wherein the ith signal set is formed by multiplying the X-PAM signal set with a parameter (1/X)(i−1), wherein i is an integer from 1 to M, and generating a X-PAM signal set joint coding/decoding table according a superposition result of the M signal sets; generating M transmitting bit sub-sequences according to the transmitting bit sequence; generating M transmitting signals according to the M transmitting bit sub-sequences and the X-PAM signal set joint coding/decoding table; transmitting the M transmitting signals to a wireless transmission channel via M transmitting antennae.
摘要:
An inventive switch for transporting information cells without cell contention is described. The switch includes at least one parallel distribution network. Each distribution network includes an N.times.N first routing network for receiving cells at a plurality of input ports, where N equals the number the input ports. Illustratively, the routing network is self-routing and non-blocking, such as a Banyan Network. Connected to the N.times.N network are .rho..sup.k groups of shared buffers for storing the cells routed through the network for a period of time not greater than one cell cycle, where k is incremented from 1 to �log.sub.2 N/log.sub.2 .rho.!.sup.-1 and .rho. equals a predetermined speed-up factor. In one aspect of this embodiment, the number of shared buffers is simply equal to N/.rho.. To prevent cell contention and cell loss, all of the contentious cells (cells destined for the same output during the same cycle) are stored in the same shared buffer. Connected to the shared buffers are .rho..sup.k groups of (N/.rho..sup.k).times.(N/.rho..sup.k) routing networks each having a plurality of output ports for outputting the cells, stored in the shared buffers, based on the destination addresses of each cell. Due in part to the utilization of .rho..sup.k groups of shared buffers, a large reduction in both hardware costs and chip real estate is realized. Specifically, a decrease in the number of switching stages is achieved.