US3774201A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time compression signal processor
Assignee: Raytheon Co
•
Filing: 1970-12-17
•
Granted: 1973-11-20
•
Expires: 1990-12-17
Abstract
Abstract A time compression system used for spectrum analysis of multichannel digital systems in which there are X identical input channels and Y identical filters. Each input is sampled in parallel and then quantized with an analog-to-digital converter. The inputs are then stored channel by channel in a random access memory. Readout is interleaved simultaneously with the writing and each channel is readout serially. The stored digital signals are converted back to serial analog signals and fed to a single bank of filters for spectrum analysis.
Inventors
- 👤 J Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:32
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/50; G01S13/58; G01S13/64
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
75 words
In combination: means for sequentially sampling input signals from each of a plurality of channels; means for storing digital data signals derived from said signal samples in a storing sequence and for reading said data from said storing means in a reading sequence; said storing sequence being different from said reading sequence; and said data being read during time periods between the time period during which each sample is taken from each of said channels.
Claim 2
Dependent Claim
75 words
In combination: means for sequentially sampling input signals from each of a plurality of channels; means for storing digital data signals derived from said signal samples in a storing sequence and for reading said data from said storing means in a reading sequence; said storing sequence being different from said reading sequence; and said data being read during time periods between the time period during which each sample is taken from each of said channels.
Claim 3
Dependent Claim
27 words
The combination in accordance with claim 1 wherein analog signals reconstructed from said data signals read out of said storing means are fed to a filter bank.
Claim 4
Dependent Claim
24 words
The combination in accordance with claim 2 wherein said filter bank comprises a plurality of frequency responsive filters responsive to respectively different frequency bands.
Claim 5
Dependent Claim
21 words
The combination in accordance with claim 1 wherein said signal samples are converted to digital data signals at a predetermined rate.
Claim 6
Dependent Claim
30 words
The combination in accordance with claim 4 wherein digital signals read out from said storing means are fed to a digital-to-analog converter to convert said digital signals to analog signals.
Claim 7
Dependent Claim
17 words
The combination in accordance with claim 5 wherein said analog signals are fed to a multichannel filter.
Claim 8
Dependent Claim
18 words
The combination in accordance with claim 6 wherein said multichannel filter comprises a plurality of frequency responsive filters.
Claim 9
Dependent Claim
21 words
The combination in accordance with claim 7 wherein the outputs of said frequency responsive filters are fed to a switching network.
Claim 10
Dependent Claim
25 words
The combination in accordance with claim 8 wherein the outputs of said frequency responsive filters are fed through said switching network to a common channel.
References Cited (Backward Citations)
US3292175A
Cited
US3150368A
Cited
US3333247A
Cited
US3388377A
Cited
US3337870A
Cited
US3623096A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |