Patent US4091379A successfully refreshed from Google Patents.
US4091379A
Expired / Lapsed
US
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Analog to digital wave shaping system
Assignee: Western Atlas Inc
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Filing: 1976-05-03
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Granted: 1978-05-23
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Expires: 1996-05-03
Abstract
Abstract An analog to digital wave shaping system comprising, a source of analog signals, adaptive threshold circuitry coupled to said source, said adaptive threshold circuitry having an output selected as a function of the intensity of said analog signal compared to a fixed intensity signal, and, comparator circuitry coupled to said source and to the output of said adaptive threshold circuitry.
Inventors
- 👤 Paul S. Wu
- 👤 Jagdish C. Tandon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:14
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/10; G06K7/10544; G06K7/10821; G06K7/10851; H; H03; H03K; H03K5/00; H03K5/01; H03K5/08; H03K5/082; H04; H04N; H04N1/00; H04N1/40; H04N1/403
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
298 words
An analog to digital wave shaping system comprising: a source of analog signals; first differentiator means having an input coupled to said source of analog signals and an output; inverter means having an input and an output; second differentiator means having an input connected to the output of said first differentiator means and an output; first comparator means having a pair of outputs, and having an input coupled to the output of said second differentiator; second comparator means having an input and an output; third comparator means having an input and an output; adaptive threshold selector means having an input coupled to said first differentiator means input, and an output; said adaptive threshold selector means including a fixed intensity signal source; said adaptive threshold selector means output being equal to the intensity of said fixed intensity signal source whenever said fixed intensity signal source intensity exceeds the intensity of said analog signals and being equal to the intensity of said analog signals whenever said fixed intensity signal source intensity is less than the intensity of said analog signals; said adaptive threshold selector means output being coupled to said second comparator means input and to said inverter means input; the output of said inverter means being coupled to an input of said third comparator means; the output of said first differentiator means being coupled to an input of said second comparator means and to an input of said third comparator means; first and second gate means; and flip-flop means; a first output of said first comparator and said second comparator output and a second output of said first comparator and said third comparator output being coupled to said first and second gate means, respectively; said first and second gate means each having an output coupled to said flip-flop means.
Claim 2
Dependent Claim
298 words
An analog to digital wave shaping system comprising: a source of analog signals; first differentiator means having an input coupled to said source of analog signals and an output; inverter means having an input and an output; second differentiator means having an input connected to the output of said first differentiator means and an output; first comparator means having a pair of outputs, and having an input coupled to the output of said second differentiator; second comparator means having an input and an output; third comparator means having an input and an output; adaptive threshold selector means having an input coupled to said first differentiator means input, and an output; said adaptive threshold selector means including a fixed intensity signal source; said adaptive threshold selector means output being equal to the intensity of said fixed intensity signal source whenever said fixed intensity signal source intensity exceeds the intensity of said analog signals and being equal to the intensity of said analog signals whenever said fixed intensity signal source intensity is less than the intensity of said analog signals; said adaptive threshold selector means output being coupled to said second comparator means input and to said inverter means input; the output of said inverter means being coupled to an input of said third comparator means; the output of said first differentiator means being coupled to an input of said second comparator means and to an input of said third comparator means; first and second gate means; and flip-flop means; a first output of said first comparator and said second comparator output and a second output of said first comparator and said third comparator output being coupled to said first and second gate means, respectively; said first and second gate means each having an output coupled to said flip-flop means.
Claim 3
Dependent Claim
47 words
An analog to digital wave shaping system as set forth in claim 1, further comprising: peak detector means and divider means coupled between the output of said first differentiator means and the input of said first differentiator means and the input of said adaptive threshold selector means.
Claim 4
Dependent Claim
25 words
An analog to digital wave shaping system as set forth in claim 1, wherein: said fixed intensity signal source is a source of direct current.
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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) | 1981-05-22 | 1981-11-21 | 1982-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-22 | 1985-11-21 | 1986-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-22 | 1989-11-21 | 1990-05-23 | $7700.00 | Window Closed / Lapsed |