Patent US4697275A successfully refreshed from Google Patents.
US4697275A
Expired / Lapsed
US
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Receiving circuit for signal transmission systems
Assignee: Wincor Nixdorf International GmbH
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Filing: 1985-08-13
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Granted: 1987-09-29
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Expires: 2005-08-13
Abstract
Abstract A receiving level control signal is generated line side, and the data signal is reproduced line side of a receiving circuit for signal transmission systems to regenerate a data signal and to generate a receiving level control signal from a received bipolar input signal, in which line and operating side are electrically isolated.
Inventors
- 👤 Hans-Bodo Laue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:34
CPC Classifications
H; H04; H04L; H04L25/00; H04L25/02; H04L25/20; H04L25/26
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
244 words
A receiving circuit for an electrical signal transmission system employed to regenerate a level control electrical signal from an input bipolar electrical signal, comprising: an operating side for delivering the regenerated electrical data signal and a receiving level electrical control signal; a line side having an input for receiving said bipolar signal; an optocoupler device (10) for electrically isolating said line side from said operating side and for transferring said data signal and said level control signal from said line side to said operating side; a pair of comparators (20,22) on said line side for respectively establishing positive and negative receiving thresholds for said bipolar input signal, including a pair of outputs (32,34) for generating said level control signal; regenerating means (48) on said line side for regenerating said data signal, said regenerating means including an input for receiving said received data signal and an output for outputting the regenerated data signal; delay means (36) on said line side and coupled with the outputs (32,34) of said comparators (20,22) for delaying the delivery of said level control signal from said line side to said operating side for a preselected length of time; and switch means (42) on said line side and responsive to said delay means for selectively connecting the output of said regenerating means (48) with said optocoupler device (10), whereby the transfer of said regenerated data signal from said line side to said operating side is controlled by said level control signal.
Claim 2
Dependent Claim
244 words
A receiving circuit for an electrical signal transmission system employed to regenerate a level control electrical signal from an input bipolar electrical signal, comprising: an operating side for delivering the regenerated electrical data signal and a receiving level electrical control signal; a line side having an input for receiving said bipolar signal; an optocoupler device (10) for electrically isolating said line side from said operating side and for transferring said data signal and said level control signal from said line side to said operating side; a pair of comparators (20,22) on said line side for respectively establishing positive and negative receiving thresholds for said bipolar input signal, including a pair of outputs (32,34) for generating said level control signal; regenerating means (48) on said line side for regenerating said data signal, said regenerating means including an input for receiving said received data signal and an output for outputting the regenerated data signal; delay means (36) on said line side and coupled with the outputs (32,34) of said comparators (20,22) for delaying the delivery of said level control signal from said line side to said operating side for a preselected length of time; and switch means (42) on said line side and responsive to said delay means for selectively connecting the output of said regenerating means (48) with said optocoupler device (10), whereby the transfer of said regenerated data signal from said line side to said operating side is controlled by said level control signal.
Claim 3
Dependent Claim
15 words
The receiving circuit of claim 1, wherein said delay means (36) includes a Schmitt trigger.
Claim 4
Dependent Claim
13 words
The receiving circuit of claim 2, wherein said Schmitt trigger includes a comparator.
Claim 5
Dependent Claim
39 words
The receiving circuit of claim 1, wherein said switch means (42) includes a transistor having a base controlled by said level control signal, said transistor being coupled in a circuit containing said delay means and said optocoupler device (10).
Claim 6
Dependent Claim
22 words
The receiving circuit of claim 1, wherein said regenerating means includes a Schmitt trigger having an input for receiving said bipolar signal.
Claim 7
Dependent Claim
13 words
The receiving circuit of claim 5, wherein said Schmitt trigger includes a comparator.
Claim 8
Dependent Claim
43 words
the receiving circuit of claim 1, wherein said delay means (36) includes an output (38) connected with said switch means (42) and said optocoupler device (10) for simultaneously delivering said level control signal to said switch means (42) and said optocoupler device (10).
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-09-28 | 1991-03-30 | 1991-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-28 | 1995-03-30 | 1995-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-28 | 1999-03-30 | 1999-09-29 | $7700.00 | Window Closed / Lapsed |