US3808366A
Expired / Lapsed
US
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Binary data transmission system
Assignee: SPX Technologies Inc
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Filing: 1972-12-11
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Granted: 1974-04-30
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Expires: 1992-12-11
Abstract
Abstract A receiver for receiving binary data from a transmission line is disclosed. Binary data is transmitted by a return to zero polarity reversal scheme. That is, one of the digits of the binary pair is transmitted when there is a polarity difference in a first direction between the lines and the other digit of the binary pair is transmitted when there is a polarity difference in an opposite direction between the lines. The lines return to a zero potential difference between successive codes even when successive codes are identical. Polarity sensitive sensing devices are used to detect and respond to potential differences and potential equality between the lines of the transmission line. A gate is coupled to the sensing devices for providing an individual output signal in response to each return to zero line condition. Other gates are coupled to the sensing devices, and each other, in such a manner that they uniquely respond to a potential difference, in a first direction, between the lines of the transmision line and preserve their respective unique response until such time as a potential difference, in an opposite direction, exists between the lines of the transmission line. The unique response is preserved irrespective of the fact that the potential between the lines may return to zero. The gate which responds to return to zero potential provides synchronization signals.
Inventors
- 👤 C Wanamaker
- 👤 R Nuss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:06
CPC Classifications
H; H04; H04L; H04L25/00; H04L25/38; H04L25/40; H04L25/49; H04L25/4904; H04L25/02; H04L25/20; H04L25/26
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
180 words
A binary data receiveR comprising in combination: a. a data transmission channel having first and second lines for coupling a transmitting station to a receiving station; b. control gate means and detecting means at said receiving station and coupled to said first and second lines to cooperate for producing a signal responsive to either of said first or second lines being rendered positive with respect to the other; c. first and second gate means coupled to said transmission channel and said detecting means for producing a first distinctive output signal in response to said first line being rendered positive with respect to said second line and for producing a second distinctive output signal in response to said second line being rendered positive with respect to said first line; and d. intercoupling means between said first and second gate means for causing them to preserve said first or second distinctive output signals irrespective of the potentials applied to said first and second lines, until the potentials applied to said first and second lines are such as to reverse the potentials therebetween.
Claim 2
Dependent Claim
180 words
A binary data receiveR comprising in combination: a. a data transmission channel having first and second lines for coupling a transmitting station to a receiving station; b. control gate means and detecting means at said receiving station and coupled to said first and second lines to cooperate for producing a signal responsive to either of said first or second lines being rendered positive with respect to the other; c. first and second gate means coupled to said transmission channel and said detecting means for producing a first distinctive output signal in response to said first line being rendered positive with respect to said second line and for producing a second distinctive output signal in response to said second line being rendered positive with respect to said first line; and d. intercoupling means between said first and second gate means for causing them to preserve said first or second distinctive output signals irrespective of the potentials applied to said first and second lines, until the potentials applied to said first and second lines are such as to reverse the potentials therebetween.
Claim 3
Dependent Claim
18 words
The combination as set forth in claim 1 wherein said detecting means comprise first and second optical couplers.
Claim 4
Dependent Claim
25 words
generating a second code indicative of the direction of the polarity difference between said one channel and said other channel of said transmission line; and
Claim 5
Dependent Claim
25 words
generating a second code indicative of the direction of the polarity difference between said one channel and said other channel of said transmission line; and
Claim 6
Dependent Claim
103 words
an output signal such that said first and second gates generate negative and positive output signals, respectively, when said data signal is at said second potential level and said synchronizing signal is pulsed; e. a two channel data transmission line having one channel coupled to the output of said first gate and the other channel coupled to the output of said second gate; f. detecting means coupled to said transmission line for providing first and second characteristic signals indicative of the instantaneous potential difference between the channels of said transmission line; and g. signal interpreting gate means coupled to said detecting means for:
Claim 7
Dependent Claim
103 words
an output signal such that said first and second gates generate negative and positive output signals, respectively, when said data signal is at said second potential level and said synchronizing signal is pulsed; e. a two channel data transmission line having one channel coupled to the output of said first gate and the other channel coupled to the output of said second gate; f. detecting means coupled to said transmission line for providing first and second characteristic signals indicative of the instantaneous potential difference between the channels of said transmission line; and g. signal interpreting gate means coupled to said detecting means for:
Claim 8
Dependent Claim
45 words
maintaining said second code irrespective of the then instantaneous potential difference between the channels of said transmission line until such time as there is a reversal in the polarity, of the potential difference between said one channel and said other channel of said transmission line.
Claim 9
Dependent Claim
45 words
maintaining said second code irrespective of the then instantaneous potential difference between the channels of said transmission line until such time as there is a reversal in the polarity, of the potential difference between said one channel and said other channel of said transmission line.
Claim 10
Dependent Claim
18 words
The combination as set forth in claim 1 wherein said first and second gate means comprise NAND gates.
Claim 11
Dependent Claim
32 words
The combination as set forth in claim 1 wherein said control gate has as first and second inputs thereto signals which correspond to an input to said first and second gates, respectively.
Claim 12
Dependent Claim
47 words
The combination as set forth in claim 1 wnerein said transmitting station includes: a. a data signal lead which is switched between first and second potentials for representing the first and second bits of binary data; and b. a synchronizing lead which is pulsed once per bit.
Claim 13
Dependent Claim
196 words
A code receiver for receiving binary codes transmitted over a line pair with differential polarity reversal used to distinguish between the binary bits and comprising in combination: a. first and second detecting means bridged across said line pair for responding to polarity differences in first and second directions between the lines of said line pair; b. first and second gate means coupled to said first and second detecting means, respectively, for producing a distinctive output signed each time said first or second detecting means responds to a polarity difference; and c. third gate means coupled to said first and second detecting means and responsive to each polarity reversal between the lines of said line pair for producing a distinctive output signal; and wherein d. said first and second gate means have their outputs coupled as an input to said second and first gate means, respectively, for latching the respective first and second gate means so that they preserve a continuous output signal irrespective of the potential between the lines of said line pair until such time as a potential reversal between the lines of said line pair is detected by said first and second detecting means.
Claim 14
Dependent Claim
196 words
A code receiver for receiving binary codes transmitted over a line pair with differential polarity reversal used to distinguish between the binary bits and comprising in combination: a. first and second detecting means bridged across said line pair for responding to polarity differences in first and second directions between the lines of said line pair; b. first and second gate means coupled to said first and second detecting means, respectively, for producing a distinctive output signed each time said first or second detecting means responds to a polarity difference; and c. third gate means coupled to said first and second detecting means and responsive to each polarity reversal between the lines of said line pair for producing a distinctive output signal; and wherein d. said first and second gate means have their outputs coupled as an input to said second and first gate means, respectively, for latching the respective first and second gate means so that they preserve a continuous output signal irrespective of the potential between the lines of said line pair until such time as a potential reversal between the lines of said line pair is detected by said first and second detecting means.
Claim 15
Dependent Claim
18 words
The combination as set forth in claim 6 wherein said first and second detecting means comprise optical couplers.
Claim 16
Dependent Claim
18 words
The combination as set forth in claim 6 wherein said first and second gate means comprise NAND gates.
Claim 17
Dependent Claim
100 words
A binary data transmission system comprising in combination: a. a data signal having first and second potential levels for indicating the first and second bits, respectively, of binary data; b. an inverter for providing an inverse signal which is the inverse of said data signal; c. first and second gates with said first gate having said data signal applied as an input and with said second gate having said inverse signal applied as an input; d. a pulsed synchronizing signal coupled as an input to both said first and second gates for causing said first and second gates to generate;
Claim 18
Dependent Claim
100 words
A binary data transmission system comprising in combination: a. a data signal having first and second potential levels for indicating the first and second bits, respectively, of binary data; b. an inverter for providing an inverse signal which is the inverse of said data signal; c. first and second gates with said first gate having said data signal applied as an input and with said second gate having said inverse signal applied as an input; d. a pulsed synchronizing signal coupled as an input to both said first and second gates for causing said first and second gates to generate;
References Cited (Backward Citations)
US3501704A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-29 | 1977-10-29 | 1978-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-29 | 1981-10-29 | 1982-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-29 | 1985-10-29 | 1986-04-30 | $7700.00 | Window Closed / Lapsed |