Patent US5142284A successfully refreshed from Google Patents.
US5142284A
Expired / Lapsed
US
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Sample and hold with intermediate reset voltage outside of the magnitude range of the input
Assignee: Tektronix Inc
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Filing: 1991-12-23
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Granted: 1992-08-25
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Expires: 2011-12-23
Abstract
Abstract An input signal is sampled by alternately coupling the input signal and a reference level to a sample storage element, whereby the magnitude of the signal stored by the storage element immediately following application of the input signal to the storage element is a function of the input signal magnitude and the magnitude of the signal stored by the storage element immediately preceding coupling of the input signal to the storage element is a function of the reference level.
Inventors
- 👤 William A. Trent
- 👤 Kevin B. McDonald
- 👤 Florian G. Bell
- 👤 Richard I. Lane
- 👤 Glenn Bateman
- 👤 Michael S. Overton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:00
CPC Classifications
G; G11; G11C; G11C27/00; G11C27/02; G11C27/024; G11C27/026
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
169 words
A method of sampling an input signal in a sampling system having a sample storage element, a source of reference level, and a means for selectively coupling either the input signal or the reference level to the storage element, the method comprising: repeatably coupling the input signal to the sample storage element with the magnitude of the value stored by the storage element immediately following the coupling of the input signal to the storage element being a function of the input signal magnitude and the transfer efficiency of the coupling means, and between consecutive couplings of the input signal to the storage element, coupling the sample storage element to the reference level source with the magnitude of the value stored by the storage element immediately before the coupling the input signal to the storage element being a function of the reference level, the magnitude value of the reference level stored on the storage element being outside the magnitude range of the input signal value stored on the storage element.
Claim 2
Independent Claim
169 words
A method of sampling an input signal in a sampling system having a sample storage element, a source of reference level, and a means for selectively coupling either the input signal or the reference level to the storage element, the method comprising: repeatably coupling the input signal to the sample storage element with the magnitude of the value stored by the storage element immediately following the coupling of the input signal to the storage element being a function of the input signal magnitude and the transfer efficiency of the coupling means, and between consecutive couplings of the input signal to the storage element, coupling the sample storage element to the reference level source with the magnitude of the value stored by the storage element immediately before the coupling the input signal to the storage element being a function of the reference level, the magnitude value of the reference level stored on the storage element being outside the magnitude range of the input signal value stored on the storage element.
Claim 3
Dependent Claim
27 words
A method according to claim 1, comprising quantizing the value stored by the storage element immediately following the coupling of the input signal to the storage element.
Claim 4
Dependent Claim
139 words
Sampling apparatus comprising a sample storage element, means for coupling an input signal to the sample storage element in which the magnitude of the value stored by the storage element immediately following the coupling of the input signal to the storage element is a function of the input signal magnitude and the transfer efficiency of the input signal coupling means, and means for coupling a reference level to the sample storage element immediately before coupling the input signal to the storage element with the magnitude of the value stored by the storage element immediately before the coupling of the input signal to the storage element being a function of the reference level, the magnitude value of the reference level stored on the storage element being outside the magnitude range of the input signal value stored on the storage element.
Claim 5
Dependent Claim
139 words
Sampling apparatus comprising a sample storage element, means for coupling an input signal to the sample storage element in which the magnitude of the value stored by the storage element immediately following the coupling of the input signal to the storage element is a function of the input signal magnitude and the transfer efficiency of the input signal coupling means, and means for coupling a reference level to the sample storage element immediately before coupling the input signal to the storage element with the magnitude of the value stored by the storage element immediately before the coupling of the input signal to the storage element being a function of the reference level, the magnitude value of the reference level stored on the storage element being outside the magnitude range of the input signal value stored on the storage element.
Claim 6
Dependent Claim
41 words
Apparatus according to claim 3, wherein the means for coupling the input signal to the sample storage element comprise a signal sampling gate and the means for coupling the reference level to the sample storage element comprise a reset sample gate.
Claim 7
Dependent Claim
43 words
Apparatus according to claim 3, further comprising a digitizer, an amplifier having an input terminal connected to the signal storage element and an output terminal connected to the digitizer, and a feedback capacitor connected between the input and output terminals of the amplifier.
Claim 8
Dependent Claim
124 words
Apparatus for sampling an input signal, comprising a sample storage element, a source of a reference level, and means for selectively coupling either the input signal or the reference level to the sample storage element, the value stored by the storage element immediately before the coupling of the input signal to the storage element being a function of the reference level and the value stored by the storage element immediately following the coupling of the input signal to the storage element being a function of the input signal magnitude and the transfer efficiency of the coupling means, the magnitude value of the reference level stored on the storage element being outside the magnitude range of the input signal value stored on the storage element.
Claim 9
Dependent Claim
124 words
Apparatus for sampling an input signal, comprising a sample storage element, a source of a reference level, and means for selectively coupling either the input signal or the reference level to the sample storage element, the value stored by the storage element immediately before the coupling of the input signal to the storage element being a function of the reference level and the value stored by the storage element immediately following the coupling of the input signal to the storage element being a function of the input signal magnitude and the transfer efficiency of the coupling means, the magnitude value of the reference level stored on the storage element being outside the magnitude range of the input signal value stored on the storage element.
Claim 10
Dependent Claim
43 words
Apparatus according to claim 6, further comprising a digitizer, an amplifier having an input terminal connected to the signal storage element and an output terminal connected to the digitizer, and a feedback capacitor connected between the input and output terminals of the amplifier.
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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) | 1995-08-25 | 1996-02-24 | 1996-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-25 | 2000-02-24 | 2000-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-25 | 2004-02-24 | 2004-08-25 | $7700.00 | Window Closed / Lapsed |