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US3752933A
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Bit regeneration for time division multiplexers
Assignee: Databit Inc
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Filing: 1972-01-06
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Granted: 1973-08-14
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Expires: 1992-01-06
Abstract
Abstract The disclosed multiplexer responds to data appearing on separate channels at different signalling speeds or bit rates. At least two sampling rates are selected. One of the sampling rates is a base rate equal to or higher than the lowest signalling speed and the other sampling rate is a multiple of the base rate equal to or higher than the fastest signalling speed. The lowest speed signals are sampled at the base rate and the higher speed signals with the higher rate. The resulting sampled data is then interleaved. The lowest bit rate occupies the normal number of slots and the higher bit rate occupies a multiple number of the low rate slots. The interleaved signals are then transmitted. To accommodate telex call-establishing signals, which may occur in the same channel at rates different from the data rate, the existence of such call-establishing signals is determined and the sampling times are adjusted. The sampled signals are regenerated into bits which are multiples of the data rate. These bits are interleaved as data. Within the multiplexer distortion is removed by regenerating the signals in each channel on the bais of the condition of the center of each bit. This is comparable to a repeater. The bit center is located by high speed sampling techniques which count to the center of each bit on the basis of predetermined programs which are preset in accordance with the expected bit rate in each channel.
Inventors
- 👤 P Cohen
- 👤 P Ackerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:09
CPC Classifications
H; H04; H04L; H04L25/00; H04L25/02; H04L25/06; H04L25/068
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
93 words
An apparatus for analyzing pulse data of a predetermined bit rate, comprising sampling means for sampling the data at a given rate greater than the bit rate so as to obtain an expected plurality of samples of each bit, counting means responsive to a transition from one bit to the next and connected to said sampling means for counting at the sampling rate, said counting means including signal producing means for producing a signal in response to the counting means reaching a predetermined count substantially equal to half the expected number of samples.
Claim 2
Independent Claim
93 words
An apparatus for analyzing pulse data of a predetermined bit rate, comprising sampling means for sampling the data at a given rate greater than the bit rate so as to obtain an expected plurality of samples of each bit, counting means responsive to a transition from one bit to the next and connected to said sampling means for counting at the sampling rate, said counting means including signal producing means for producing a signal in response to the counting means reaching a predetermined count substantially equal to half the expected number of samples.
Claim 3
Dependent Claim
25 words
An apparatus as in claim 1, further comprising generating means responsive to said signal producing means for producing a pulse corresponding to each bit sample.
Claim 4
Dependent Claim
30 words
An apparatus as in claim 1, further comprising pulse generating means responsive to said signal producing means and the data for sampling the data at the time of each signal.
Claim 5
Independent Claim
140 words
An apparatus for multiplexing pulse data appearing at different channels at different given bit rates, comprising a plurality of sampling means each for sampling data on one of the channels at the same time address with different addresses for each channel and at the same sampling rate so that for each channel there exists a given number of expected samples for each bit, combining means for interleaving the samples, counting means responsive to the start of a bit and including a plurality of portions each for counting at the sampling rate, each of said portions of said counting means including signal producing means for producing a signal in response to the portions each reaching a count equal substantially to half the expected number of samples, and output means for regenerating and interleaving the data on the basis of the signals.
Claim 6
Independent Claim
140 words
An apparatus for multiplexing pulse data appearing at different channels at different given bit rates, comprising a plurality of sampling means each for sampling data on one of the channels at the same time address with different addresses for each channel and at the same sampling rate so that for each channel there exists a given number of expected samples for each bit, combining means for interleaving the samples, counting means responsive to the start of a bit and including a plurality of portions each for counting at the sampling rate, each of said portions of said counting means including signal producing means for producing a signal in response to the portions each reaching a count equal substantially to half the expected number of samples, and output means for regenerating and interleaving the data on the basis of the signals.
Claim 7
Dependent Claim
29 words
An apparatus as in claim 4, wherein said output means includes pulse generating means responsive to said signal producing means for producing a pulse corresponding to each bit sampled.
Claim 8
Dependent Claim
35 words
An apparatus as in claim 4, wherein said regenerating means includes pulse generating means responsive to each of said signal producing means and the data for sampling the data at the time of each signal.
Claim 9
Independent Claim
73 words
The method of analyzing pulse data of a predetermined bit rate, which comprises sampling the data at a given rate greater than the bit rate so as to obtain an expected plurality of samples of each bit, counting at the sampling rate in response to a transition from one bit to the next, and Producing a signal when the count reaches a predetermined count substantially equal to half the expected number of samples.
Claim 10
Independent Claim
73 words
The method of analyzing pulse data of a predetermined bit rate, which comprises sampling the data at a given rate greater than the bit rate so as to obtain an expected plurality of samples of each bit, counting at the sampling rate in response to a transition from one bit to the next, and Producing a signal when the count reaches a predetermined count substantially equal to half the expected number of samples.
Claim 11
Dependent Claim
23 words
The method as in claim 7, which further comprises producing a pulse corresponding to each bit sampled in response to the signals produced.
Claim 12
Dependent Claim
28 words
The method as in claim 6, which further comprises sampling the data at the time of each signal in response to the signal producing means and the data.
Claim 13
Independent Claim
109 words
The method of multiplexing pulse data appearing at different channels at different given bit rates. which comprises sampling the data in each channel at the same rate but at different time addresses in each channel so that for each channel there exists a given number of expected samples for each bit, interleaving the samples, generating a plurality of pulses at each address at the sampling rate and counting the pulses at each address, producing a signal in response to the count at each address reaching a value equal substantially to half the expected number of samples, and regenerating the data and interleaving it on the basis of these signals.
Claim 14
Independent Claim
109 words
The method of multiplexing pulse data appearing at different channels at different given bit rates. which comprises sampling the data in each channel at the same rate but at different time addresses in each channel so that for each channel there exists a given number of expected samples for each bit, interleaving the samples, generating a plurality of pulses at each address at the sampling rate and counting the pulses at each address, producing a signal in response to the count at each address reaching a value equal substantially to half the expected number of samples, and regenerating the data and interleaving it on the basis of these signals.
Claim 15
Dependent Claim
35 words
The method as in claim 10, wherein the step of regenerating includes sampling the data at the time of each signal in response to the signals for regenerating the data and then interleaving the data.
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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |