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US4020292A
Expired / Lapsed
US
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Band-compressor device
Assignee: Thales SA
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Filing: 1975-12-03
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Granted: 1977-04-26
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Expires: 1995-12-03
Abstract
Abstract A band-compressor devices designed to match to one another two systems having different pass bands, comprises means for coding input signals in the form of N digital signals corresponding, at any instant, to the amplitude of the input signal with respect to N quantizing levels. N bistable trigger stages of RS or JK type, followed by as many D-type bistable stages, are provided to receive said digital signals on the one hand and pulses furnished by a clock on the other. The output signals from the bistable stages of type D are then recombined in an adder in order to furnish analog signals or in a coder for furnishing signals in binary form.
Inventors
- 👤 Jean-Claude Charlot
- 👤 Jean-Claude Falconnier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:27
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/08; G01S13/10; G01S13/26; G01S13/28
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
144 words
A band-compression device ocmprising an input terminal designed to receive a signal occupying a frequency range of width W, means for encoding said input signal in the form of N digital signals respectively corresponding to the value of the amplitude of the input signal with respect to N quantizing levels where N is a whole number, a clock circuit for producing pulses having a recurrence frequency less than said width W, N RS-type bistable trigger stages having first inputs respectively connected to the outputs of said encoding means and having second inputs connected to said clock, N D-type bistable trigger stages having first inputs respectively connected to the outputs of said N RS-type bistable stages and having second inputs connected to said clock, and N-input decoding means connected to the outputs of said D-type bistable stages for producing a signal whose bandwidth is compressed.
Claim 2
Dependent Claim
144 words
A band-compression device ocmprising an input terminal designed to receive a signal occupying a frequency range of width W, means for encoding said input signal in the form of N digital signals respectively corresponding to the value of the amplitude of the input signal with respect to N quantizing levels where N is a whole number, a clock circuit for producing pulses having a recurrence frequency less than said width W, N RS-type bistable trigger stages having first inputs respectively connected to the outputs of said encoding means and having second inputs connected to said clock, N D-type bistable trigger stages having first inputs respectively connected to the outputs of said N RS-type bistable stages and having second inputs connected to said clock, and N-input decoding means connected to the outputs of said D-type bistable stages for producing a signal whose bandwidth is compressed.
Claim 3
Dependent Claim
41 words
A band-compression device as defined in claim 1 wherein said decoding means comprise an adder circuit with N inputs and an output connected to a low-pass filter whose pass band is substantially equal to the recurrence frequency of the clock pulses.
Claim 4
Dependent Claim
27 words
A band-compression device as defined in claim 1 wherein said decoder means comprise a coder circuit with N inputs and n outputs furnishing signals in binary form.
Claim 5
Dependent Claim
144 words
A band-compression device comprising an input terminal designed to receive a signal occupying a frequency range of width W, means for encoding said input signal in the form of N digital signals respectively corresponding to the value of the amplitude of the input signal with respect to N quantizing levels where N is a whole number, a clock circuit for producing pulses having a recurrence frequency less than said width W, N JK-type bistable trigger stages having first inputs respectively connected to the outputs of said encoding means and having second inputs connected to said clock, N D-type bistable trigger stages having first inputs respectively connected to the outputs of said N JK-tupe bistable stages and having second inputs connected to said clock, and N-input decoding means connected to the outputs of said D-type bistable stage for producing a signal whose bandwidth is compressed.
Claim 6
Dependent Claim
144 words
A band-compression device comprising an input terminal designed to receive a signal occupying a frequency range of width W, means for encoding said input signal in the form of N digital signals respectively corresponding to the value of the amplitude of the input signal with respect to N quantizing levels where N is a whole number, a clock circuit for producing pulses having a recurrence frequency less than said width W, N JK-type bistable trigger stages having first inputs respectively connected to the outputs of said encoding means and having second inputs connected to said clock, N D-type bistable trigger stages having first inputs respectively connected to the outputs of said N JK-tupe bistable stages and having second inputs connected to said clock, and N-input decoding means connected to the outputs of said D-type bistable stage for producing a signal whose bandwidth is compressed.
Claim 7
Dependent Claim
41 words
A band-compression device as defined in claim 4 wherein said decoding means comprise an adder circuit with N inputs, and an output connected to a low-pass filter whose pass band is substantially equal to the recurrence frequency of the clock pulses.
Claim 8
Dependent Claim
27 words
A band-compression device as defined in claim 4 wherein said decoder means comprise a coder circuit with N inputs and n outputs furnishing signals in binary form.
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) | 1980-04-25 | 1980-10-25 | 1981-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-25 | 1984-10-25 | 1985-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-25 | 1988-10-25 | 1989-04-26 | $7700.00 | Window Closed / Lapsed |