US4237422A
Expired / Lapsed
US
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Chromatograph signal generator
Assignee: Mobil Oil AS
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Filing: 1978-08-31
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Granted: 1980-12-02
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Expires: 1998-08-31
Abstract
Abstract A chromatograph signal generator employs a plurality of Gaussian-waveform generators and a ramp voltage generator. A summing amplifier combines the outputs of such generators to produce a composite chromatographic output.
Inventors
- 👤 Wilfried K. Lenhardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:16
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/86; G01N30/8693; H; H03; H03B; H03B29/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
38 words
A chromatograph signal generator comprising: (a) a plurality of Gaussian-waveform generators, (b) a ramp generator, and (c) means for summing the outputs of said plurality of Gaussian-waveform generators and said ramp generator to produce a chromatograph signal output.
Claim 2
Dependent Claim
38 words
A chromatograph signal generator comprising: (a) a plurality of Gaussian-waveform generators, (b) a ramp generator, and (c) means for summing the outputs of said plurality of Gaussian-waveform generators and said ramp generator to produce a chromatograph signal output.
Claim 3
Dependent Claim
23 words
The generator of claim 1 further including means for adjusting the amplitudes of the outputs of each of said plurality of Gaussian-waveform generators.
Claim 4
Dependent Claim
19 words
The generator of claim 1 further including means for adjusting the slope of the output of said ramp generator.
Claim 5
Dependent Claim
27 words
The generator of claim 1 further including means for selecting the times at which the amplitude peaks of the outputs of each of said Gaussian-waveform generators occur.
Claim 6
Dependent Claim
80 words
The generator of claim 4 wherein said means for selecting the times of said amplitude peaks comprises: (a) means for providing clock pulses, (b) variable means settable to a predetermined number for each of said plurality of Gaussian-waveform generators, and (c) a comparator for each of said plurality of Gaussian-waveform generators, each comparator producing a signal for enabling the corresponding Gaussian-waveform generator when the number of clock pulses produced coincides with the predetermined number set for said corresponding Gaussian-waveform generator.
Claim 7
Dependent Claim
67 words
The generator of claim 1 wherein each of said Gaussian-waveform generators comprises: (a) means for providing clock pulses, (b) a counter for accumulating a count of said clock pulses, (c) a programmable read only memory having a selected Gaussian-transfer function responsive to a predetermined count output of said counter, and (d) a digital-to-analog converter coupled to the output of said memory for providing an analog Gaussian-waveform output.
Claim 8
Dependent Claim
30 words
The generator of claim 6 further including an operational amplifier coupled to the output of said digital-to-analog converter and having variable means for adjusting the amplitude of the Gaussian-waveform output.
Claim 9
Dependent Claim
50 words
The ramp generator of claim 1 comprising: (a) means for providing clock pulses, (b) a counter for accumulating a count of said clock pulses, and (c) a digital-to-analog converter coupled to the output of said counter for providing an analog ramp voltage corresponding to the count output of said counter.
Claim 10
Dependent Claim
30 words
The ramp generator of claim 8 further including an operational amplifier coupled to the output of said digital-to-analog converter having variable means for adjusting the slope of said ramp voltage.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-02 | 1984-06-02 | 1984-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-02 | 1988-06-02 | 1988-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-02 | 1992-06-02 | 1992-12-02 | $7700.00 | Window Closed / Lapsed |