US4150436A
Expired / Lapsed
US
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First order sample and hold
Assignee: Applied Automation Inc
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Filing: 1977-12-23
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Granted: 1979-04-17
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Expires: 1997-12-23
Abstract
Abstract A method and apparatus is provided which can correctly reproduce any signal with a constant slope in time. The signal of interest is sampled at two different times t 1 and t 2 . The two sampled values are then utilized to predict the value of the signal of interest at a time t 3 . In this manner trend information is provided concerning the signal of interest between the sample times t 2 and t 3 .
Inventors
- 👤 Troy J. Pemberton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:36
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/86; G01N30/8603; G06; G06G; G06G7/00; G06G7/12; G06G7/30
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
222 words
Apparatus comprising: means for establishing a first signal which is continuous in time; first sampling means for sampling said first signal and for establishing a second signal representative of the sampled value of said first signal at a point in time t 1 ; second sampling means for sampling said first signal and for establishing a third signal representative of the sampled value of said first signal at a point in time t 2 which is later in time than said point in time t 1 ; means for combining said second signal and said third signal to produce a fourth signal representative of said second signal subtracted from said third signal; means for dividing said fourth signal by the sample period T, where T is defined as said point in time t 1 subtracted from said point in time t 2 , to establish a fifth signal; means for integrating said fifth signal over said sample period T to establish a sixth signal; and means for combining said third signal and said sixth signal to establish a seventh signal representative of a prediction of the value of said first signal at points in time between said point in time t 2 and a point in time t 3 which is later in time than said point in time t 2 .
Claim 2
Dependent Claim
222 words
Apparatus comprising: means for establishing a first signal which is continuous in time; first sampling means for sampling said first signal and for establishing a second signal representative of the sampled value of said first signal at a point in time t 1 ; second sampling means for sampling said first signal and for establishing a third signal representative of the sampled value of said first signal at a point in time t 2 which is later in time than said point in time t 1 ; means for combining said second signal and said third signal to produce a fourth signal representative of said second signal subtracted from said third signal; means for dividing said fourth signal by the sample period T, where T is defined as said point in time t 1 subtracted from said point in time t 2 , to establish a fifth signal; means for integrating said fifth signal over said sample period T to establish a sixth signal; and means for combining said third signal and said sixth signal to establish a seventh signal representative of a prediction of the value of said first signal at points in time between said point in time t 2 and a point in time t 3 which is later in time than said point in time t 2 .
Claim 3
Dependent Claim
56 words
Apparatus in accordance with claim 1 wherein said means for establishing said fourth signal comprises: inverting means for accepting said third signal and for establishing an eighth signal representative of the inversion of said third signal; and summing amplifier means for combining and inverting said eighth signal and said second signal to establish said fourth signal.
Claim 4
Independent Claim
214 words
A method for implementing a first order sample and hold comprising the steps of: establishing a first signal which is continuous in time; sampling said first signal and establishing a second signal representative of the sampled value of said first signal at a point in time t 1 ; sampling said first signal and establishing a third signal representative of the sampled value of said first signal at a point in time t 2 which is later in time than said point in time t 1 ; combining said second signal and said third signal to produce a fourth signal representative of said second signal subtracted from said third signal; dividing said fourth signal by the sample period T, where T is defined as said point in time t 1 subtracted from said point in time t 2 , to establish a fifth signal; integrating said fifth signal over said sample period T to establish a sixth signal; and combining said third signal and said sixth signal to establish a seventh signal representative of a prediction of the value of said first signal at points in time between said point in time t 2 and a point in time t 3 which is later in time than said point in time t 2 .
Claim 5
Independent Claim
214 words
A method for implementing a first order sample and hold comprising the steps of: establishing a first signal which is continuous in time; sampling said first signal and establishing a second signal representative of the sampled value of said first signal at a point in time t 1 ; sampling said first signal and establishing a third signal representative of the sampled value of said first signal at a point in time t 2 which is later in time than said point in time t 1 ; combining said second signal and said third signal to produce a fourth signal representative of said second signal subtracted from said third signal; dividing said fourth signal by the sample period T, where T is defined as said point in time t 1 subtracted from said point in time t 2 , to establish a fifth signal; integrating said fifth signal over said sample period T to establish a sixth signal; and combining said third signal and said sixth signal to establish a seventh signal representative of a prediction of the value of said first signal at points in time between said point in time t 2 and a point in time t 3 which is later in time than said point in time t 2 .
Claim 6
Dependent Claim
31 words
A method in accordance with claim 3 wherein said step of establishing said fourth signal comprises inverting and combining said fifth signal and said second signal to establish said fourth signal.
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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) | 1982-04-16 | 1982-10-16 | 1983-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-16 | 1986-10-16 | 1987-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-16 | 1990-10-16 | 1991-04-17 | $7700.00 | Window Closed / Lapsed |