摘要:
A DC to DC boost converter circuit receives a DC input voltage and converts it to a DC output voltage at a different voltage level than the DC input voltage. The DC to DC boost converter includes a switching power converter for receiving the input voltage on an input and converting the input voltage to an output as the DC output voltage in response to pulse control signals. A switching controller generates the pulse control signals during a switching cycle. Current sensing circuitry limits a current passing through the switching power converter. The current sensing circuitry generates an overload signal when the current exceeds a reference value. The current sensing circuitry sensing the current with a current sensing resistor having a size of at least approximately 500 ohms.
摘要:
An integrated circuit having an embedded multiple time programmable memory includes a processing core for executing stored instructions with a data memory and a non volatile memory. The non-volatile memory block provides for storage of program instructions and includes a plurality of blocks of non-volatile memory, each of which can be written to once and read from many times and each having a size that is equal to or less than a program memory address space addressable by the processing core for output of data there from. It also includes a reserve storage location for storing a status word defining the one of the plurality of blocks addressable by the processing core, the status word operable to be changed in response to external signals when another of the plurality of blocks is to be selected, such that once another of the plurality of blocks is selected, the status word cannot indicate as addressable by the processing core a prior one of the plurality of blocks that was defined by the status word as being previously addressable by the processing core.
摘要:
An architecture for automatically configuring equipment. A piece of equipment connected externally to a user PC has one or more machine-resolvable codes (MRCs) associated therewith. The piece of equipment receives configuration information from a remote location disposed on the network in response to reading a select one of the one or more MRCs with a reader. Configuration information associated with the select one of the one or more MRCs is transmitted from the remote location to the piece of equipment via the user PC, and the piece of equipment is then configured according to the configuration information.
摘要:
A method for converting analog data to digital data includes operating an analog-to-digital data converter in a tracking mode to sample an input signal and in a convert mode to convert the sampled input signal after sampling to a digital signal. The analog-to-digital data converter is controlled with a controller to operate in different modes of operation by providing at least one step wherein the tracking mode of operation is controlled to initiate at a predetermined time to begin the sampling operation.
摘要:
An interlocking architecture for a software interface and a bar code scanner. Upon power-up, a handshaking operation is performed between a scanner (1600) having a scanner processor (2600) and a computer processor (2612) of a computer (302) based upon the code stored in the NV memory (2602) of the scanner (1600) and a unique code associated with the software interface running on the computer (302). A wedge (1608) is provided as an interface mechanism for the scanner (1600) and a keyboard (1610) to a keyboard port (2500) of the computer (302). The handshaking occurs through the wedge (1608) via a keyboard interface (2610) to the processor (2600) such that a successful handshake directs the processor (2600) to engage a switch (2604) which enables power to a sensing head (2606) for read optically encoded information. The software interface operates from a computer memory (2614) associated with the processor (2612) whereby an unsuccessful handshake using unique number of the software interface by the processor (2612) sends a disabling signal though the keyboard circuit (2618) through the wedge (1608) to the scanner processor (2600) to disengage the switch (2604) to drop power to the sensor head (2606). The handshaking operation is performed on a regular basis during system power-up to ensure that the original software interface and scanner (1600) are still in use.
摘要:
DMA controller for mixed signal device. A mixed signal integrated circuit with memory control is disclosed. A data conversion circuit is provided that is operable to receive an analog input signal and convert discrete samples thereof at a predetermined sampling rate to a digital representations thereof as a plurality of digital words. A memory stores the digital words generated by the data conversion circuit. A processor is included on the integrated circuit and operable to access the memory to output select ones of the digital words for processing thereof in accordance with a predetermined processing algorithm. A memory access controller controls access to the memory by the data conversion circuit and the processor. The memory access controller is operable to restrict access to the memory by the data conversion circuit without interrupting the generation of digital words therefrom when the processor is accessing the memory, and allowing access to the memory by the data conversion circuitry when the processor is not accessing the memory, such that the data conversion circuit can transfer currently generated digital words and previously generated and non stored digital words for storage in said memory upon gaining access thereto.
摘要:
An apparatus for reducing surge currents during startup of a voltage regulator is disclosed that includes circuitry for maintaining a voltage at an FB pin of the voltage regulator substantially equivalent to an output voltage of the voltage regulator.
摘要:
Method and apparatus for generating unique id packets in a distributed processing system. A method for facilitating processing over a network includes generating at a server location on the network a pointer that defines an information profile on the network. The pointer is then associated with the information profile, and the pointer and the associated information profile transmitted to at least two locations on the network. The pointer can then be transmitted to one of the at least two locations on the network from another location on the network during a processing operation on the network for the purpose of processing a network transaction at the receiving one of the at least two locations on the network, which network transaction requires the associated information profile, such that only transmission of the pointer is required for the processing operation.
摘要:
A communications system includes RF processing circuitry for receiving a plurality of data streams and processing the plurality of data streams to associate with each of the plurality of data streams an orthogonal function to cause each of the plurality of data streams to be mutually orthogonal to each other on an RF link to enable transmission of each of the plurality of data streams on the RF link at a same time. Optical processing circuitry receives the plurality of data streams and processes the plurality of data streams to associate with each of the plurality of data streams the orthogonal function to cause each of the plurality of data streams to be mutually orthogonal to each other on an optical link to enable transmission of each of the plurality of data streams on the optical link at a same time. Switching circuitry multiplexes between the RF link and the optical link responsive to operating conditions on the RF link and the optical link.
摘要:
A golf club grip for attachment to a shaft of a golf club, the grip comprising an elongated body including a proximate end, a distal end, a first flat surface, the first flat surface having a proximate edge, a distal edge, a first long edge, and a second long edge, a second flat surface, the second flat surface having a proximate edge, a distal edge, a first long edge, and a second long edge, a first curved surface having an outwardly convex curvature, the first curved surface having a curved edge between the first long edge of the first flat surface and the first long edge of the second flat surface, and a second curved surface having an outwardly convex curvature, the second curved surface having a curved edge between the second long edge of the first flat surface and the second long edge of the second flat surface.