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US3875528A
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Pseudo-independent noise generator
Assignee: Cegelec SA
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Filing: 1973-02-12
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Granted: 1975-04-01
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Expires: 1993-02-12
Abstract
Abstract Generator of noises which are pseudo-independent from one another, characterized in that the noises other than the original noise are drawn off from shift registers supplied by disjunction operators receiving certain of the bits from another register of the generator.
Inventors
- 👤 Jean-Jacques Hirsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:33
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/58; G06F7/582; G06F7/584; G06F7/60; G06F7/70; G06F2207/00; G06F2207/58; G06F2207/581; G06F2207/583
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
97 words
A pseudo-independent noise generator in which an uncertain or pseudo-uncertain original noise is produced by a first shift register connected to a first disjunction operator circuit, the first shift register feeding a first comparator to which data to be coded is also applied, means for generating at least one other pseudo-independent noise comprising a second disjunction operator circuit connected to selected stages of said first shift register, a second shift register having its input connected to said second disjunction operator circuit and a second comparator connected to said second shift register and receiving data to be coded.
Claim 2
Dependent Claim
97 words
A pseudo-independent noise generator in which an uncertain or pseudo-uncertain original noise is produced by a first shift register connected to a first disjunction operator circuit, the first shift register feeding a first comparator to which data to be coded is also applied, means for generating at least one other pseudo-independent noise comprising a second disjunction operator circuit connected to selected stages of said first shift register, a second shift register having its input connected to said second disjunction operator circuit and a second comparator connected to said second shift register and receiving data to be coded.
Claim 3
Dependent Claim
21 words
A pseudo-independent noise generator as defined in claim 1 wherein said first and second shift registers are negative reaction shift registers.
Claim 4
Dependent Claim
38 words
A pseudo-independent noise generator as defined in claim 1 wherein said first shift register is a five stage shift register, the first and fifth stages of said first shift register being connected to said second disjunction operator circuit.
Claim 5
Dependent Claim
140 words
A pseudo-independent noise generator as defined in claim 3 wherein said second disjunction operator circuit comprises first and second NAND gates, one input of said second disjunction operator circuit being connected to an input of said first NAND gate and a second input of said second disjunction operator circuit being connected to an input of said second NAND gate, a first inverter connected between said one input of said second disjunction operator circuit and a second input of said second NAND gate, a second inverter connected between said second input of said second disjunction operator circuit and a second input of said first NAND gate, a third NAND gate having respective inputs connected to the outputs of said first and second NAND gates, the output of said third NAND gate serving as the output of said second disjunction operator circuit.
Claim 6
Dependent Claim
21 words
A pseudo-independent noise generator as defined in claim 4 wherein said first and second shift registers are negative reaction shift registers.
References Cited (Backward Citations)
US3777278A
Cited
US3761696A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |