High repetition rate transient recorder with automatic integration
First Claim
1. A high speed data acquisition system for processing input data values representative of the magnitude of sequential, substantially repetitive transient signal waveforms, sampled for each occurrence at a plurality of sample points in time, comprising a data summation system for summing the data values in a predetermined number of individual time-resolved time bins over a number of sequential transient signal waveforms, with each time bin corresponding to a sample point, including a plurality of data summation subsystems arranged in parallel channels to each other, means for directing input data values to one data summation subsystem at a time and sequentially to all of the data summation subsystems such that each parallel channel data summation subsystem receives and stores input data values in a repetitive sequence, each parallel data summation subsystem including at least first and second parallel data summation subcircuits, each having a memory bank therein, and input switching means for directing the input data values associated with sequential transient waveforms first to all of said first parallel data summation subcircuits for a given number of input transient signal waveforms such that a given number of transient waveforms are summed and stored in the first parallel data summation subscircuits in data summing operations, and said input switching means next directing the input data values associated with sequential transient waveforms to all of said second parallel data summation subcircuits for a given number of input transient signal waveforms such that a given number of transient waveforms are next summed and stored in the second parallel data summation subcircuits in data summing operations, whereby the first and second parallel data summation subcircuits alternately receive and sum input data values.
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Abstract
A system for high speed acquisition and storage of data from transient electrical signal waveforms sampled in time at a multiplicity of points, and where it is desired to collect and store data in real time in a mass storage unit, but where the data rate is in excess of the apparent rate at which data can be transferred to mass storage. The overall system employs two levels of data reduction, the first being digital integration (summation) and the second being data processing. In the digital summation section memory read and write cycles overlap for higher speed. In one embodiment, a charge-coupled device is employed as an input element to reduce the data rate prior to subsequent digital processing. The system is capable of recording all the intensities of all transients continuously without loss of data significance.
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Citations
16 Claims
- 1. A high speed data acquisition system for processing input data values representative of the magnitude of sequential, substantially repetitive transient signal waveforms, sampled for each occurrence at a plurality of sample points in time, comprising a data summation system for summing the data values in a predetermined number of individual time-resolved time bins over a number of sequential transient signal waveforms, with each time bin corresponding to a sample point, including a plurality of data summation subsystems arranged in parallel channels to each other, means for directing input data values to one data summation subsystem at a time and sequentially to all of the data summation subsystems such that each parallel channel data summation subsystem receives and stores input data values in a repetitive sequence, each parallel data summation subsystem including at least first and second parallel data summation subcircuits, each having a memory bank therein, and input switching means for directing the input data values associated with sequential transient waveforms first to all of said first parallel data summation subcircuits for a given number of input transient signal waveforms such that a given number of transient waveforms are summed and stored in the first parallel data summation subscircuits in data summing operations, and said input switching means next directing the input data values associated with sequential transient waveforms to all of said second parallel data summation subcircuits for a given number of input transient signal waveforms such that a given number of transient waveforms are next summed and stored in the second parallel data summation subcircuits in data summing operations, whereby the first and second parallel data summation subcircuits alternately receive and sum input data values.
Specification