System for digitizing transient signals with waveform accumulator
First Claim
1. An apparatus for capturing and digitizing a signal derived from an event, comprising:
- a memory for storing a sequence of analog samples from the signal derived from the event in a sampling operation occurring at about a 0.5 gigahertz or higher sampling rate;
means communicating with the memory for selectively initiating the read out of analog samples in the memory;
an array of analog to digital converters for receiving a sequence of analog samples read out from the memory and producing from the analog samples a corresponding vector of digitized sample values;
a waveform accumulator integrated with the array of analog to digital converters for receiving a vector of new digitized sample values from a new sampling operation and combining these with a vector of digitized sample values from at least one prior sampling operation; and
an output stage for outputting the digitized sample values developed in the waveform accumulator.
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Accused Products
Abstract
An apparatus for capturing and digitizing a signal derived from an event has a memory for storing a sequence of analog samples from the signal derived from the event in a sampling operation occurring at about a 0.5 gigahertz or higher sampling rate. Circuitry communicating with the memory selectively initiates the read out of the analog samples in the memories. An array of analog to digital converters receives a sequence of analog samples read out from the memory and produces from the analog samples a corresponding vector of digitized sample values. A waveform accumulator integrated with the array of analog to digital converters receives a vector of digitized sample values from a new waveform and combines these with a vector of digitized sample values from at least one prior waveform. An output stage outputs the vector of digitized sample values developed in the waveform accumulator.
57 Citations
22 Claims
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1. An apparatus for capturing and digitizing a signal derived from an event, comprising:
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a memory for storing a sequence of analog samples from the signal derived from the event in a sampling operation occurring at about a 0.5 gigahertz or higher sampling rate;
means communicating with the memory for selectively initiating the read out of analog samples in the memory;
an array of analog to digital converters for receiving a sequence of analog samples read out from the memory and producing from the analog samples a corresponding vector of digitized sample values;
a waveform accumulator integrated with the array of analog to digital converters for receiving a vector of new digitized sample values from a new sampling operation and combining these with a vector of digitized sample values from at least one prior sampling operation; and
an output stage for outputting the digitized sample values developed in the waveform accumulator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for capturing and digitizing a signal derived from an event, comprising:
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storing at about a 0.5 gigahertz or higher rate in a memory analog waveform samples of the signal derived from the event;
selectively initiating the read out of the analog samples in the memory;
receiving at an array of analog to digital converters analog samples read out from the memory and producing for the analog samples in the memory a corresponding vector of digitized sample values;
controlling a waveform accumulator integrated with the array of analog to digital converters to receive a vector of digitized sample values from a new waveform and to combine the vector of digitized sample values from the new waveform with a vector of digitized sample values from at least one prior waveform; and
outputting the combined vector of digitized sample values from the waveform accumulator. - View Dependent Claims (12, 13, 14, 15, 16)
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17. An apparatus for capturing and digitizing analog samples derived from a waveform representing an event, comprising:
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a memory capable of storing a vector of analog samples from the waveform, sampled at approximately a 0.5 gigahertz or higher rate;
a digital signal processor;
control means associated with the digital signal processor for communicating with the memory and for selectively initiating the read out of the vector of analog samples in the memory;
an array of analog to digital converters for receiving the vector of analog samples read out from the memory and producing a corresponding vector of digitized sample values;
a waveform accumulator under control of the digital signal processor and coupled to the array of analog to digital converters for receiving a vector of digitized sample values from a new waveform and combining these with a vector of digitized sample values of at least one prior waveform; and
an output stage under control of the digital signal processor for controlling the waveform combining and outputting the digitized sample values combined in the waveform accumulator after a specified accumulation level is reached. - View Dependent Claims (18, 19, 20, 21, 22)
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Specification