US3725677A
Expired / Lapsed
US
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Computer utilizing random pulse trains
Assignee: Individual
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Filing: 1971-03-24
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Granted: 1973-04-03
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Expires: 1991-03-24
Abstract
Abstract Noise signals from a diode and clock pulses from a clock pulse source are fed to input legs of a logic circuit such as an AND gate, causing pulses of variable amplitude to appear in the output of the circuit. A threshold circuit suppresses pulses having amplitudes below a predetermined level. The remaining pulses trigger a univibrator thus causing pulses to be generated at random times in synchronous with clock pulses thereby forming a train of synchronous random pulses. Trains of random pulses from several such random pulse generators are fed to logic circuits to perform arithmetic operations, such as multiplication.
Inventors
- 👤 R Lawlor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:52
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/84; G; G06; G06F; G06F7/00; G06F7/60; G06F7/70; G06G; G06G7/00; G06G7/12; G06G7/16; G06G7/161
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
73 words
In a random pulse generator, the combination of: a source of clock pulses that occur successively at regular intervals, a source of successively occurring noise signals of variable amplitude, and means controlled by pulses from said two sources for producing a series of randomly occurring output pulses, each of which latter pulses occurs only when the amplitude of the noise signal lies in a predetermined range during the occurrence of a clock pulse.
Claim 2
Dependent Claim
73 words
In a random pulse generator, the combination of: a source of clock pulses that occur successively at regular intervals, a source of successively occurring noise signals of variable amplitude, and means controlled by pulses from said two sources for producing a series of randomly occurring output pulses, each of which latter pulses occurs only when the amplitude of the noise signal lies in a predetermined range during the occurrence of a clock pulse.
Claim 3
Dependent Claim
45 words
In a random pulse generator as defined in claim 1 wherein said output pulseS have different amplitudes depending upon the amplitudes of the noise signals, and comprising means for producing output pulses only when the amplitude of said noise signals lies above a predetermined level.
Claim 4
Dependent Claim
77 words
In a random pulse generator as defined in claim 1 wherein said means comprises an AND gate having input terminals to which pulses from said two sources are fed respectively whereby said output pulses have different amplitudes depending upon the amplitudes of the noise signals, and a threshold circuit connected to the output of said AND gate for producing output pulses only when the amplitude of said the first mentioned output pulses lies above a predetermined threshold.
Claim 5
Dependent Claim
40 words
In a random pulse generator defined in claim 3: a single-shot multivibrator connected to said threshold circuit for producing an output pulse of predetermined shape in response to each of the pulses occurring in the output of the threshold circuit.
Claim 6
Dependent Claim
47 words
In a random pulse generator defined in claim 4: means including an AND gate and an inverter connected to said threshold circuit and to said clock pulse source for producing a train of pulses complementary to the train of pulses appearing in the output of the multivibrator.
Claim 7
Dependent Claim
38 words
In a random pulse generator as defined in claim 3: means for adjusting the threshold established by the threshold circuit whereby the average rate at which pulses occur in the output of the threshold circuit may be varied.
Claim 8
Dependent Claim
44 words
In a random pulse generator as defined in claim 5: means for adjusting the threshold established by the threshold circuit whereby the average rates at which pulses occur in said two output trains may be varied while the sum of said averages remains constant.
Claim 9
Dependent Claim
113 words
A random pulse generator, the combination of a source of clock pulses, a source of noise signals, means controlled by said clock pulse source and said noise source for generating output pulses having randomly different amplitudes but occurring in synchronized relation with said clock pulses, means including a transistor having a base, a collector, and an emitter for selectively detecting such random pulses, said last mentioned means including a potentiometer connected to a voltage supply and a slider movable along the length of said potentiometer and connected in circuit with said emitter for adjusting the bias on said emitter thereby selectively generating pulses in the collector circuit in response to said output pulses.
Claim 10
Dependent Claim
113 words
A random pulse generator, the combination of a source of clock pulses, a source of noise signals, means controlled by said clock pulse source and said noise source for generating output pulses having randomly different amplitudes but occurring in synchronized relation with said clock pulses, means including a transistor having a base, a collector, and an emitter for selectively detecting such random pulses, said last mentioned means including a potentiometer connected to a voltage supply and a slider movable along the length of said potentiometer and connected in circuit with said emitter for adjusting the bias on said emitter thereby selectively generating pulses in the collector circuit in response to said output pulses.
Claim 11
Dependent Claim
19 words
A random pulse generator as defined in claim 8 wherein said source of noise signals is an overloaded diode.
Claim 12
Dependent Claim
73 words
In a random pulse generator, the combination of: a source of clock pulses that occur successively at regular intervals, a source of successively occurring noise signals in which parts of the signal that exceed a specific amplitude occur at irregular intervals, and means controlled by said clock pulses and by said parts of said noise signals for producing a series of output pulses at random intervals but in synchronism with said clock pulses.
Claim 13
Dependent Claim
73 words
In a random pulse generator, the combination of: a source of clock pulses that occur successively at regular intervals, a source of successively occurring noise signals in which parts of the signal that exceed a specific amplitude occur at irregular intervals, and means controlled by said clock pulses and by said parts of said noise signals for producing a series of output pulses at random intervals but in synchronism with said clock pulses.
Claim 14
Dependent Claim
76 words
In a random pulse generator as defined in claim 10 wherein said means comprises an AND gate having input terminals to which pulses from said two sources are fed respectively whereby said output pulses have different amplitudes depending upon the amplitudes of the noise signals, and a threshold circuit connected to the output of said AND gate for producing output pulses only when the amplitude of the first mentioned output pulses lies above a predetermined threshold.
Claim 15
Dependent Claim
40 words
In a random pulse generator defined in claim 11: a single-shot multivibrator connected to said threshold circuit for producing an output pulse of predetermined shape in response to each of the pulses occurring in the output of the threshold circuit.
Claim 16
Dependent Claim
47 words
In a random pulse generator defined in claim 12: means including an AND gate and an inverter connected to said threshold circuit and to said clock pulse source for producing a train oF pulses complementary to the train of pulses appearing in the output of the multivibrator.
Claim 17
Dependent Claim
38 words
In a random pulse generator as defined in claim 11: means for adjusting the threshold established by the threshold circuit whereby the average rate at which pulses occur in the output of the threshold circuit may be varied.
Claim 18
Dependent Claim
44 words
In a random pulse generator as defined in claim 13: means for adjusting the threshold established by the threshold circuit whereby the average rates at which pulses occur in said two output trains may be varied while the sum of said averages remains constant.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |