Multiple channel digital memory system
First Claim
1. A system for digitally storing samples of the amplitude of an analog signal, such samples being taken at a constant sampling frequency, f, comprising:
- (a) a plurality of, n, digital storage means, each one being fed, in parallel, by the analog signal and each one being adapted to store a train of samples of the amplitude of the analog signal fed thereto in response to a train of sampling pulses fed to such one of the plurality of digital storage means;
(b) means for producing a plurality of trains of the sampling pulses, each one of such trains of the sampling pulses having a pulse repetition frequency f/n, with the sampling pulses in the trains thereof being displaced in time, one from another, an amount 1/(nf); and
,(c) means for feeding each one of the plurality of the produced trains of the sampling pulses to a corresponding one of the plurality of digital storage means.
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Abstract
A system for digitally storing samples of an analog signal taken at a sampling rate, f, and for reconstructing said analog signal from such stored samples. The analog signal is separated into a plurality of, n, channels, each one of such channels having a digital storage section. Each one of the storage sections is adapted to store a sample of the analog signal in response to a sampling pulse. A pulse generator circuit is provided and supplies one of a plurality of trains of periodic sampling pulses to a corresponding one of the plurality of storage sections. The sampling pulses in each of the trains of sampling pulses have a pulse repetition frequency, f/n. Further, the sampling pulses in successive trains thereof are delayed in time 1/nth the period of the sampling pulses. Apparatus is provided for retrieving the samples stored in the plurality of storage sections in the same sequence as such samples were stored. The sequentially retrieved samples are obtained at the rate, f, and are combined into a composite signal, such composite signal being a reconstruction of the analog signal. By using plural channels, each one of the storage sections samples the analog signal at a rate less than that required for a single channel system.
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Citations
10 Claims
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1. A system for digitally storing samples of the amplitude of an analog signal, such samples being taken at a constant sampling frequency, f, comprising:
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(a) a plurality of, n, digital storage means, each one being fed, in parallel, by the analog signal and each one being adapted to store a train of samples of the amplitude of the analog signal fed thereto in response to a train of sampling pulses fed to such one of the plurality of digital storage means; (b) means for producing a plurality of trains of the sampling pulses, each one of such trains of the sampling pulses having a pulse repetition frequency f/n, with the sampling pulses in the trains thereof being displaced in time, one from another, an amount 1/(nf); and
,(c) means for feeding each one of the plurality of the produced trains of the sampling pulses to a corresponding one of the plurality of digital storage means. - View Dependent Claims (2, 3, 4)
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5. A system for digitally storing samples of the amplitude of an analog signal, such samples being taken at a constant sampling frequency, f, comprising:
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(a) means for coupling the analog signal, in parallel, to a plurality of, n, signal channels; (b) a plurality of, n, digital storage means, each one thereof being disposed in a corresponding one of the plurality of signal channels and each one thereof being fed by the analog signal, each one of the digital storage means being adapted to store a sample of the amplitude of the analog signal fed thereto in response to a sampling pulse fed to such one of the digital storage means; (c) means for producing a plurality of, n, trains of the sampling pulses, each one of the plurality of trains of the sampling pulses having a pulse repetition frequency f/n, the sampling pulses in the trains thereof being displaced in time one from another an amount 1/(nf); and (d) means for feeding each one of the plurality of produced trains of the sampling pulses to a corresponding one of the plurality of digital storage means. - View Dependent Claims (6, 7, 8)
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9. A system for digitally storing samples of the amplitude of an analog signal at a constant sampling frequency, f, and for reconstructing such analog signal from such stored samples, comprising:
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(a) means for producing a plurality of, n, trains of sampling pulses, the sampling pulses in each of the trains thereof having a sampling frequency f/n; (b) a plurality of digital storage means, each one thereof having an input fed in parallel by the analog signal and each one thereof being fed by a corresponding one of the plurality of trains of the sampling pulses, each one of such digital storage means storing a train of samples of the amplitude of the analog signal fed to the input thereof in response to a corresponding one of the plurality of trains of sampling pulses fed thereto; and (c) means, fed by the plurality of digital storage means, for retrieving the samples stored in the plurality of digital storage means in the same sequence as such samples were stored in such plurality of digital storage means, including means for combining such sequentially retrieved samples into a composite signal, such composite signal being a reconstruction of the analog signal. - View Dependent Claims (10)
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Specification