摘要:
An apparatus and method are disclosed for initiating automatic recovery from a signal loss. A frequency division circuit receives a system clock signal, and generates an output signal having a lower frequency than the clock signal. An input detection circuit receives an asynchronous input signal from an external source and outputs a third output signal that indicates whether or not the asynchronous input signal is present or absent within a prescribed detection interval. A recovery circuit receives the system clock signal and the third output signal, and outputs a recovery signal that indicates a loss of the asynchronous input signal over a predetermined length of time. The recovery signal is used as a trigger to initiate a recovery process by the system.
摘要:
A novel method and apparatus providing an all digital phase comparator of two binary signals which employs a type of cross correlation of two binary signals and provides a 2bit binary word uniquely representative of phase alignment. The method can be carried out using a pair of flip-flop (FF) circuits, each FF having a docking input and a data input, and where each FF has a delay in series with its data input.
摘要:
An all digital data algorithmic recovery method and apparatus which operates at jitter greater than 25% and where run length is more than 1000 bits and which uses self calibrated delay elements to phase align a locally generated time ruler reference with the data average transition position to reliably establish the sampling time for retrieving data from an incoming binary sequence at the center of the data eye. The phase adjusted time ruler signal is used to sample transition positions of the data and the sampled data is statistically analyzed in a state machine wherein the time ruler is a broadband signal comprising a first and second base frequency and wherein the period of one of said frequencies is ##EQU1## where F.sub.R equals the receiver local clock frequency and F.sub.T equals the frequency of the distant clock.
摘要:
Disclosed is a method, a system and a serving node for data backup and restoration, in which a serving node generates a backup schedule after receiving a data backup request, uploads the schedule to a cluster public storage block, each serving node sends a copy to be backed up to a target node for consolidation; a client sends a data record in a consolidated copy to the serving node through a data writing request, generates a data distribution table according to a load balancing principle, sends the request to other serving nodes according to the table to perform a write operation, the client sends the data writing request for a next data record after the write operation, until the copy is completely restored. The backup and restoration is performed in a complex cluster network accounting for performance differences among serving nodes, data consistency, data integrity and data uniform distribution.
摘要:
An in-vehicle charger of an electric vehicle or a hybrid electric vehicle is provided. The in-vehicle charger comprises: a rectification and voltage-stabilizing circuit, which inputs, rectifies and stabilizes a commercial power; a traction battery charging circuit, which is electrically connected with the rectification and voltage-stabilizing circuit, and which charges a traction battery; a control communication circuit, which is electrically connected with the rectification and voltage-stabilizing circuit, and which controls the traction battery charging circuit; and a starting battery charging circuit, which is electrically connected with the rectification and voltage-stabilizing circuit, and which starts charging of a starting battery under control of the control communication circuit.
摘要:
The present invention discloses a method for triggering a nesting service, which relates to the technique of broadband service triggering and service nesting. The present invention is proposed for solving the problem that the existing nesting service occupies more system bandwidths, wherein the method includes: when receiving a call request of a nesting service in a normal service flow, determining a service key of the nesting service according to a called number of the nesting service, taking the service key as a call access object, converting the call request of the nesting service into a call access message in a service platform where a normal service is located, and triggering the nesting service in the service platform. The present invention further discloses an apparatus for implementing the previously mentioned method. The present invention reduced the bandwidth resources consumed by the nesting service, and the scheme is simple and practical.
摘要:
The present invention discloses a system and method for switching click to dial (CTD) service to multimedia conference service. The method comprises: a CTD service is performed between one user equipment (UE) and another; an application serve invites at least one of the UEs and makes said at least one of the UEs take media negotiation with the media server so as to carry out the multimedia conference service, wherein the application server is in charge of realizing not only the CTD service but also the multimedia conference service. The application server invites at least one of the UEs and makes said at least one of the UEs take media negotiation with the media server so as to carry out the multimedia conference service, thus the limitation that extra UEs cannot be joined in the call in the CTD service is overcome.
摘要:
This invention discloses a type of charging system for electric cars which includes an AC electric grid power supply system and an electric car charging equipment. The AC electric grid power supply system couples energy outputs to the electric car charging equipment; its characteristics are: it also includes an battery power system and an electrical energy control module. The electrical energy input of the battery power system is controlled by and connected to the AC electric grid power supply system. The output is controlled by the electrical energy control module and coupled to the electric car charging equipment. With the addition of one or more battery packs to the battery charging system, instantaneous current increase can be provided through the use of the battery packs in order to alleviate the demand on the electric grid. The design capacity of the battery charging system is more ideal and it reduces the instantaneous capacity overload. Meanwhile when the external electric grid fails, it can rely on the battery packs to charge electric cars and thus resolving any urgent charging needs.
摘要:
A type of portable chargers with power factor correction capability for use with electric vehicles comprises of a filtering rectifier module, an integrated circuit power supply module, a DC-DC PFC module and a DC-DC BUCK module. The filtering rectifier module has one input port and two output ports. The IC power supply module has one input port and two output ports. The DC-DC PFC module has two input ports and one output port. The DC-DC BUCK module has two input ports and one output port. The two output ports of the filtering rectifier module are connected to the input port of IC power supply module and the input port of the DC-DC PFC module respectively. The output port of the DC-DC PFC module is connected to one of the input ports of the DC-DC BUCK module. The two output ports of IC power supply module are connected, respectively, to the other input port of the DC-DC PFC module and to the other input port of the DC-DC BUCK module. This new type of portable chargers embodied with this invention can effectively reduce reactive power in the power system and develop greater power.
摘要:
A type of portable chargers with power factor correction capability for use with electric vehicles comprises of a filtering rectifier module, an integrated circuit power supply module, a DC-DC PFC module and a DC-DC BUCK module. The filtering rectifier module has one input port and two output ports. The IC power supply module has one input port and two output ports. The DC-DC PFC module has two input ports and one output port. The DC-DC BUCK module has two input ports and one output port. The two output ports of the filtering rectifier module are connected to the input port of IC power supply module and the input port of the DC-DC PFC module respectively. The output port of the DC-DC PFC module is connected to one of the input ports of the DC-DC BUCK module. The two output ports of IC power supply module are connected, respectively, to the other input port of the DC-DC PFC module and to the other input port of the DC-DC BUCK module. This new type of portable chargers embodied with this invention can effectively reduce reactive power in the power system and develop greater power.