US3757051A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Larity mode regenerative repeater for pcm signals transmitted in the alternate po
Assignee: Alcatel Lucent NV
•
Filing: 1971-11-23
•
Granted: 1973-09-04
•
Expires: 1991-11-23
Abstract
Abstract A regenerative repeater for alternate polarity PCM signals is disclosed that does not require an equalizer or amplifier. The PCM signals are directly detected by (1) determining whether the slope of the pulse is greater or less than a reference value and (2) if its polarity is opposite to that of the preceding pulse. The detected signals are reshaped by a monostable multivibrator and are retimed by a phase-locked loop. The repeater is completely digital except for the slope comparator.
Inventors
- 👤 P Girard
- 👤 C Lerouge
- 👤 M Regnier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:28
CPC Classifications
H; H04; H04L; H04L25/00; H04L25/02; H04L25/20; H04L25/24; H04L25/242; H04L25/38; H04L25/40; H04L25/49; H04L25/4917; H04L25/4923
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
340 words
A regenerative repeater for PCM signals transmitted in the alternate polarity mode comprising: a first source of distorted alternate polarity type PCM pulses; a second source of loCal timing signals; said local timing signals including at least a first timing signal having a first given repetition rate, and a second timing signal having a second given repetition rate equal to a given multiple of said first repetition rate; first means coupled to said first and second sources to produce a regenerated version of said distorted PCM pulses and a polarity indicating signal, said regenerated version of said distorted PCM pulses being produced when the value of the slope of an edge of a present one of said distorted PCM pulses is greater than a reference value and when the polarity of said present one of said distorted PCM pulses is opposite to the polarity of an immediately preceding one of said distorted PCM pulses; said first means including second means coupled to said first and second sources responsive to said distorted PCM pulses and said second timing signal to provide a first output signal having a characteristic determined by said value of said slope relative to said reference value, and third means coupled to said second means and said second source responsive to said second timing signal and said first output signal to provide said polarity indicating signal and said regenerated version of said distorted PCM pulses; fourth means coupled to said third means and said second source, said fourth means being responsive to said regenerated version of said distorted PCM pulses and said first timing signal to phase lock said timing signals to said regenerated version of said distorted PCM pulses; and fifth means coupled to said third means and said second source, said fifth means being responsive to said polarity indicating signal, said regenerated version of said distorted PCM pulses and said first timing signal to transmit as said repeater output signal a retimed and regenerated version of said distorted PCM pulses according to said alternate polarity mode.
Claim 2
Dependent Claim
340 words
A regenerative repeater for PCM signals transmitted in the alternate polarity mode comprising: a first source of distorted alternate polarity type PCM pulses; a second source of loCal timing signals; said local timing signals including at least a first timing signal having a first given repetition rate, and a second timing signal having a second given repetition rate equal to a given multiple of said first repetition rate; first means coupled to said first and second sources to produce a regenerated version of said distorted PCM pulses and a polarity indicating signal, said regenerated version of said distorted PCM pulses being produced when the value of the slope of an edge of a present one of said distorted PCM pulses is greater than a reference value and when the polarity of said present one of said distorted PCM pulses is opposite to the polarity of an immediately preceding one of said distorted PCM pulses; said first means including second means coupled to said first and second sources responsive to said distorted PCM pulses and said second timing signal to provide a first output signal having a characteristic determined by said value of said slope relative to said reference value, and third means coupled to said second means and said second source responsive to said second timing signal and said first output signal to provide said polarity indicating signal and said regenerated version of said distorted PCM pulses; fourth means coupled to said third means and said second source, said fourth means being responsive to said regenerated version of said distorted PCM pulses and said first timing signal to phase lock said timing signals to said regenerated version of said distorted PCM pulses; and fifth means coupled to said third means and said second source, said fifth means being responsive to said polarity indicating signal, said regenerated version of said distorted PCM pulses and said first timing signal to transmit as said repeater output signal a retimed and regenerated version of said distorted PCM pulses according to said alternate polarity mode.
Claim 3
Dependent Claim
76 words
A repeater according to claim 1, wherein said fourth means includes a phase detector coupled to said third means and said second source responsive to said regenerated version of said distorted PCM pulses and said first timing signal to phase lock said first and second timing signals to said regenerated version of said distorted PCM pulses and provide a given time delay between said first timing signal and said regenerated version of said distorted PCM pulses.
Claim 4
Dependent Claim
124 words
A repeater according to claim 1, wherein said second means includes a third source to provide said reference value, an amplitude comparator coupled to said first source and said third source, said comparator having a first output and a second output, said first output having a second output signal thereon when said value of said slope is greater than said reference value and said second output having a third output signal thereon when said value of said slope is less than said reference value, and a first JK flip flop having its clock input coupled to said second source responsive to said second timing signal, its binary 1 input coupled to said first output and its binary 0 input coupled to said second output.
Claim 5
Dependent Claim
115 words
A repeater according to claim 3, wherein said third source includes a capacitor having one terminal coupled to ground and the other terminal coupled to said amplitude comparator, a first current generator producing a first given value of current coupled between a given negative voltage and said other terminal of said capacitor, and a second current generator producing a second given value of current equal to twice said first given value of current coupled between a given positive voltage and said other terminal of said capacitor, said second generator being coupled to the 1 output of said first JK flip flop for controlling when said second given value of current is coupled to said capacitor.
Claim 6
Dependent Claim
199 words
A repeater according to claim 3, wherein said third means includes an RS flip flop to prOvide said polarity indicating signal, a monostable multivibrator to provide said regenerated version of said distorted PCM pulses, an N-stage counter and decoder unit having a counting input, a clearing input and an output coupled to control said RS flip flop and said monostable multivibrator, an EXCLUSIVE OR gate coupled to the 1 output of said RS flip flop and the 1 output of said first JK flip flop, a first two input coincidence device having its output coupled to said counting input of said unit, one of said two inputs coupled to the output of said EXCLUSIVE OR gate and the other of said two inputs coupled to said second source responsive to said second timing signal, an inverter having an output and an input coupled to the output of said EXCLUSIVE OR gate, and a second two input coincidence device having its output coupled to said clearing input of said unit, one of said two inputs coupled to said output of said inverter and the other of said two inputs coupled to said second source responsive to said second timing signal.
Claim 7
Dependent Claim
306 words
A repeater according to claim 5, wherein said third means includes a fifth two input coincidence device having an output, one of said two inputs coupled to the 1 output of said RS flip flop and the other of said two inputs coupled to the output of said monostable multivibrator, a fourth two input coincidence device having an output, one of said two inputs coupled to the 0 output of said RS flip flop and the other of said two inputs coupled to the output of said monostable multivibrator, a second JK flip flop having its 1 input coupled to said output of said third coincidence device, its 0 input coupled to its own 1 output and its clock input coupled to said second source responsive to said first timing signal, a third JK flip flop having its 1 input coupled to said output of said fourth coincidence device, its 0 input coupled to its own 1 output and its clock input coupled to said second source responsive to said first timing signal, a fourth source of signal having a first characteristic to provide half baud transmission of said repeater output signal and a second characteristic to provide full baud transmission of said repeater output signal, a fifth two input coincidence device having an output, one of said two inputs coupled to the 1 output of said second JK flip flop and the other of said two outputs coupled to said fourth source, a sixth two input coincidence device having an output, one of said two inputs coupled to the 1 output of said third JK flip flop and the other of said two outputs coupled to said fourth source, and sixth means coupled to said output of said fifth and sixth coincidence device to combine the output signals therefrom to provide said repeater output signal.
Claim 8
Dependent Claim
177 words
A repeater according to claim 3, wherein said third means includes an RS flip flop to provide said polarity indicating signal, a monostable multivibrator to provide said regenerated version of said distorted PCM pulses, an N-stage shift register having a storage input, N clearing inputs and an output coupled to control said RS flip flop and said monostable multivibrator, a first two input coincidence device having its output coupled to said storage input of said register, one of its inputs coupled to the 1 output of said RS flip flop and the other of its inputs coupled to the 1 output of said first JK flip flop, an inverter coupled to the output of said first coincidence device, and a second two input coincidence device having one of its two inputs coupled to the output of said inverter, the other of its two inputs coupled to said second source responsive to said second timing signal and N output, each of said N outputs being coupled to a differnt one of said N clearing inputs of said register.
Claim 9
Dependent Claim
306 words
A repeater according to claim 7, wherein said fifth means includes a third two input coiNcidence device having an output, one of said two inputs coupled to the 1 output of said RS flip flop and the other of said two inputs coupled to the output of said monostable multivibrator, a fourth two input coincidence device having an output, one of said two inputs coupled to the 0 output of said RS flip flop and the other of said two inputs coupled to the output of said monostable multivibrator, a second JK flip flop having its 1 input coupled to said output of said third coincidence device, its 0 input coupled to its own 1 output and its clock input coupled to said second source responsive to said first timing signal, a third JK flip flop having its 1 input coupled to said output of said fourth coincidence device, its 0 input coupled to its own 1 output and its clock input coupled to said second source responsive to said first timing signal, a fourth source of signal having a first characteristic to provide half baud transmission of said repeater output signal and a second characteristic to provide full baud transmission of said repeater output signal, a fifth two input coincidence device having an output, one of said two inputs coupled to the 1 output of said second JK flip flop and the other of said two outputs coupled to said fourth source, a sixth two input coincidence device having an output, one of said two inputs coupled to the 1 output of said third JK flip flop and the other of said two outputs coupled to said fourth source, and sixth means coupled to said output of said fifth and sixth coincidence device to combine the output signals therefrom to provide said repeater output signal.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |