US4136314A
Expired / Lapsed
US
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Adaptive signal weighting system
Assignee: Shawmut Bank NA
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Filing: 1977-10-31
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Granted: 1979-01-23
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Expires: 1997-10-31
Abstract
Abstract An adaptive signal weighting system for use in electrical signal transmission along a signal path comprises a variable filter disposed in the signal path having electrical transmission characteristics capable of varying in response to a first control signal the relationship between the spectral region of dominant energy in a transmitted signal relative to the other spectral regions of the transmitted signal. Frequency discrimination means senses the spectral region of dominant signal energy in the transmitted signal and provides the first control signal as a function of frequency of the dominant signal energy. Gain control means disposed in the signal path and coupled in series with the filter means provides a gain variable on the transmitted signal responsively to a second control signal. This second control signal is logarithmically related to the amplitude of the transmitted signal over at least a portion of the frequency range of the signal.
Inventors
- 👤 David E. Blackmer
- 👤 C. Rene Jaeger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:28
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/62; H04B1/64; H03; H03G; H03G9/00; H03G9/02; H03G9/025
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
162 words
An adaptive signal weighting system for use in electrical signal transmission, along a signal path said system comprising: filter means disposed in said signal path and having electrical signal transmission characteristics capable of varying in response to a first control signal the relationship between the spectral region of dominant energy in a transmitted signal relative to the other spectral regions of the transmitted signal; frequency discrimination means for sensing the spectral region of dominant signal energy in said transmitted signal and for providing said first control signal as a function of frequency of said dominant signal energy; means for generating a second control signal, said second control signal being logarithmically related to the amplitude of said transmitted signal over at least a portion of the frequency range of said signal; and gain control means disposed in said signal path and coupled in series with said filter means for applying a variable gain to said transmitted signal responsively to said second control signal.
Claim 2
Dependent Claim
162 words
An adaptive signal weighting system for use in electrical signal transmission, along a signal path said system comprising: filter means disposed in said signal path and having electrical signal transmission characteristics capable of varying in response to a first control signal the relationship between the spectral region of dominant energy in a transmitted signal relative to the other spectral regions of the transmitted signal; frequency discrimination means for sensing the spectral region of dominant signal energy in said transmitted signal and for providing said first control signal as a function of frequency of said dominant signal energy; means for generating a second control signal, said second control signal being logarithmically related to the amplitude of said transmitted signal over at least a portion of the frequency range of said signal; and gain control means disposed in said signal path and coupled in series with said filter means for applying a variable gain to said transmitted signal responsively to said second control signal.
Claim 3
Dependent Claim
38 words
A system in accordance with claim 1, wherein said second control signal is logarithmically related to the rms value of the amplitude of said transmitted signal over at least a portion of the frequency range of said signal.
Claim 4
Dependent Claim
102 words
A system according to claim 1, wherein said frequency discrimination means includes first detection means for detecting a first spectral portion of said transmitted signal and for providing a first electrical signal representative of the signal energy in said first spectral portion, second detection means for detecting a second spectral portion of said transmitted signal and for providing a second electrical signal representative of the signal energy in said second spectral portion, and means for comparing said first and second electrical signals and for generating said first control signal as a function of the comparison of said first and second electrical signals.
Claim 5
Dependent Claim
22 words
A system according to claim 3, wherein said second control signal is derived from one of said first and second electrical signals.
Claim 6
Dependent Claim
36 words
A system according to claim 3, wherein said first and second spectral regions are mutually exclusive from one another, said first spectral region including relatively low frequencies and said second spectral region including relatively high frequencies.
Claim 7
Dependent Claim
149 words
An adaptive signal weighting filtering system for use in electrical signal transmission, said system comprising in combination: filter means responsive to a control signal for altering the spectral region of dominant signal energy of a transmitted signal relative to the other spectral regions of said transmitted signal by an amount determined in accordance with said control signal, and control means for generating said control signal, said control means including first detection means for detecting a first spectral portion of said transmitted signal and for providing a first electrical signal representative of the signal energy in said first spectral portion, second detection means for detecting a second spectral portion of said transmitted signal and for providing a second electrical signal representiative of the signal energy in said second spectral portion and means for comparing said first and second electrical signals and for generating said control signal responsively to the comparison.
Claim 8
Dependent Claim
149 words
An adaptive signal weighting filtering system for use in electrical signal transmission, said system comprising in combination: filter means responsive to a control signal for altering the spectral region of dominant signal energy of a transmitted signal relative to the other spectral regions of said transmitted signal by an amount determined in accordance with said control signal, and control means for generating said control signal, said control means including first detection means for detecting a first spectral portion of said transmitted signal and for providing a first electrical signal representative of the signal energy in said first spectral portion, second detection means for detecting a second spectral portion of said transmitted signal and for providing a second electrical signal representiative of the signal energy in said second spectral portion and means for comparing said first and second electrical signals and for generating said control signal responsively to the comparison.
Claim 9
Dependent Claim
39 words
A system in accordance with claim 6, wherein said first electrical signal is logarithmically related to the amplitude of said first spectral portion and said second electrical signal is logarithmically related to the amplitude of said second spectral portion.
Claim 10
Dependent Claim
25 words
A system in accordance with claim 7, wherein said means for comparing includes means for measuring the difference between said first and second electrical signals.
Claim 11
Dependent Claim
38 words
A system in accordance with claim 7, further including gain control means coupled in series with said filter means for providing a gain variable on said transmitted signal responsively to one of said first and second electrical signals.
Claim 12
Dependent Claim
31 words
A system according to claim 7, wherein said first and second electrical signals are respectively logarithmically related to the RMS values of the amplitude of said first and second spectral portions.
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) | 1982-01-22 | 1982-07-24 | 1983-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-22 | 1986-07-24 | 1987-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-22 | 1990-07-24 | 1991-01-23 | $7700.00 | Window Closed / Lapsed |