Resources Contact Us Home
Hybrid interrupt handling for computer-controlled imaging system

Image Number 6 for United States Patent #4847765.

An exposure control module for an X-ray imaging system includes a timing and sequence controller communicating with external elements of the system on a parallel data bus. The timing and sequence controller employs a plurality of stored recipes for advancing the system through a selected mode of operation. Changes in certain of the external signals on the parallel data bus may be recognized by an interrupt handler to transfer the attention of the system. The amount of hardware required for recognition of a significant change is reduced by converting a sample of the bus data into a plurality of sets of parallel data, and storing each set in separate multiplexers. A further plurality of sets of data from a preceding sample are applied to a corresponding further set of multiplexers. The serial data in corresponding pairs of present-status and previous-status multiplexers is read out in parallel to a logic array. The logic array also receives mask signals effective to enable or inhibit selectively the recognition of positive-going and negative-going changes in the data from sample to sample. When an enabled change is detected, an interrupt is generated. The actual bus signal conditions are compared with desired bus signal conditions. Once coincidence between the actual and desired conditions is achieved, a recipe process is executed.

  Recently Added Patents
High gradient lens for charged particle beam
Wristband with detachable labels
Wireless communication system using pilot allocation, method and pilot pattern thereof
Terminal and method of controlling the same
Rose plant named `Esm R068`
Pulsed plasma with low wafer temperature for ultra thin layer etches
Method and system for providing cloud based network security services
  Randomly Featured Patents
Tunable millimeter wave filter using ferromagnetic metal films
Process for levelling film surfaces and products thereof
Massage table assembly
Process and unit for clarification of liquids
Methods and apparatus for reducing flow across compressor airfoil tips
Distributed clocking system
Use of a cytokine regulatory agent to treat rheumatoid arthritis
Plant grafting system
Apparatus for dynamically managing group transient key in wireless local area network system and method thereof
Push broadcast spreader