Abstract:
A data conversion device for converting analog data to digital data, or digital data to analog data, is composed of a data converter. and a mediator. Plural data groups are fed to the data converter that coverts the data, group by group, upon receipt of a request for converting a particular data group. If plural requests are simultaneously made, the mediator makes mediation among the plural requests to select a data group to be first converted and to set a priority order. A function uniquely corresponding to a combination of the plural requests is generated in the mediator, and the mediation is performed based on the generated function with reference to a preinstalled table showing a relation between the function and the request to be selected.
Abstract:
A method and system in which the numeric values to which counters in resampling control circuitry may be reduced. As a result, smaller registers to hold such reduced numeric values may be designed into hardware implementing said circuitry. These smaller registers present savings in processing power and hardware allocation, thereby potentially improving response times and cost efficiency of said hardware.
Abstract:
A proximity detector including a sensor unit that produces an analog signal and a processor circuit digitizing this signal. The processor circuit includes logic that determines a switching value from an initial value and an extreme value obtained during a learning mode.
Abstract:
A system for sampling an analog or digital data signal at a relatively high rate utilizing relatively slow circuitry. The system includes several sample and hold circuits, each of which receive the data signal. The sample and hold circuits are clocked by respective clock signals that are at the same frequency but equally phased apart from each other. Thus, the sample and hold circuits take samples of the data signal at times that are equally spaced apart from each other. Each of the sample and hold circuits is connected to a series of shift registers that are clocked at the same frequency as the clock used to clock the sample and hold circuit to which they are connected. The shift registers operate to sequentially store samples obtained by their respective sample and hold circuit. The output of the shift registers may be applied to the column drivers of a conventional matrix display.
Abstract:
An electronic method and apparatus for signal encoding and decoding to provide ultra low distortion reproduction of analog signals, while remaining compatible with industry standardized signal playback apparatus not incorporating the decoding features of the invention, and wherein the improved system provides an interplay of gain, slew rate and wave synthesis operations to reduce signal distortions and improve apparent resolution, all under the control of concealed control codes for triggering appropriate decoding signal reconstruction compensation complementing the signal analysis made during encoding. In addition, signals lacking the encoding process features of the invention are likewise compatible with playback decoders which do embody the invention, to provide some overall restoration enhancement.
Abstract:
An interface circuit for use with process controllers permits analog signals to be input to a process controller through a binary interface of the process controller and permits analog signals to be output from the process controller through the binary interface. The input analog signal is converted to a digital word of N bits. An identification or end indication and the N bits of the digital word are transmitted to the process controller at a rate selected for compatibility with the scan time of the process controller. The process controller includes a software routine for recognizing the N bits of the digital word. An equivalent approach is used for outputting analog signals through a binary interface of a process controller. The interface circuit can include multiple channels for inputting or outputting multiple analog signals.
Abstract:
A device for suppressing interference signals for a microprocessor evaluating a plurality of sensor signals on respective input lines coupled thereto. Each of the input lines is selectively coupled to a first resistance during a measurement interval and selectively coupled to a second resistance during an interval outside of the measurement interval.
Abstract:
A method and system in which the numeric values to which counters in resampling control circuitry may be reduced. As a result, smaller registers to hold such reduced numeric values may be designed into hardware implementing said circuitry. These smaller registers present savings in processing power and hardware allocation, thereby potentially improving response times and cost efficiency of said hardware.
Abstract:
An HSP communications system contains a host computer which executes a software modem program and a device containing a circular buffer and a D/A converter. Typically, the host executes update routines in response to interrupts from the device and writes to the circular buffer digital samples representing amplitudes of an analog signal complying with a desired communication protocol. The samples pass through the circular buffer to the D/A converter which converts the samples into an analog communication signal. In environments such as multi-tasking systems, the host may occasionally skip interrupts and not provide new samples when required. In this case, the D/A converter reuses samples in the circular buffer to generate a maintenance signal. The maintenance signal typically does not convey correct data but is sufficient to maintain a communication link and prevent a remote device from disconnecting or entering a retrain mode. To provide a smoother maintenance signal, the circular buffer's size contains samples for an integral number of periods at the carrier and baud frequency of the desired protocol. Error correction and retransmission replace incorrect or lost data.
Abstract:
An encoding method employs sixteen basic values, twelve numerical magnitudes and four directional modifiers. These values are the result combining binary digits in sets of 4 bits. The encoding method is utilized for encoding letters, symbols and programming commands. Letters are defined as numerical magnitudes altered by a directional modifier, symbols and commands are addressed as numerical magnitudes altered by two or more directional modifiers. An analog to digital encoding technique converts analog data into binary form by means of "breaking" an analog wave into a multitude of periodic waves, each wave with a particular wave-break, wave length and amplitude, supplying hence, an efficient and economical method for processing and storing binary information. An analog device describes the particular position of the sun at a given time, supplying therefor an apparatus that not only measures time but also describes space.