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公开(公告)号：DE3784490D1
公开(公告)日：1993-04-08
申请号：DE3784490
申请日：1987-04-22
Applicant: IBM
Inventor： BELLOC JACQUES , MORLEC EMILE , GODARD DOMINIQUE , QUINTIN MICHEL
Abstract: A multiplier (58) phase rotates a generated echo signal by a value X which is the estimated phase-roll value to provide a complex phase-roll connected signal. The error signal differenced between the incoming signal and the real component (112) of the corrected signal is then multipled (124) by the imaginary component (120) to provide a value Y. A phase variation estimator (128) determines the phase roll value Z in half-duplex mode, as well as in full-duplex mode, in response to this value Y. A phase filter (126) provides the estimated value X in response to the phase-roll value Z. Pref. the estimator (128) includes a third multiplier providing a value proportional to the value Y and a fourth multiplier multiplying the sign bits to provide a low-value estimate of the value Z.
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公开(公告)号：AU533622B2
公开(公告)日：1983-12-01
申请号：AU5904480
申请日：1980-06-04
Applicant: IBM
Inventor： MORLEC EMILE , REYNES DANIEL , SUZZONI JEAN-PIERRE
IPC: H01F19/00 , H03H11/48 , H04M19/00 , H04Q3/42 , H04Q3/52 , H03H7/38 , H03H11/28 , H04B3/16 , H04M1/58
Abstract: A switching network includes electronic crosspoint switches for providing electronic connection or disconnection between two voice stations. Each station is connected to the network through a line transformer. When two stations are connected to each other, the voice path in the network includes the secondary winding of the 1st station transformer, a series of crosspoint switches, a middle junctor, a series of crosspoint switches, and the secondary winding of the 2nd station transformer. Each middle junctor includes a negative resistance circuit which introduces a negative resistance in series with the voice path, thus compensating for the series losses in the network, and two negative inductance circuits connected on both sides of the junctor in parallel with the voice path, to compensate for the parallel losses, especially those introduced by the line transformers.
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公开(公告)号：CA1141454A
公开(公告)日：1983-02-15
申请号：CA352841
申请日：1980-05-27
Applicant: IBM
Inventor： MORLEC EMILE , REYNES DANIEL , SUZZONI JEAN-PIERRE
Abstract: DEVICE FOR INCREASING THE PARALLEL INDUCTANCE OF A TRANSFORMER A device for increasing the parallel inductance of a transformer, consisting of a negative inductance element, connected across a winding of the transformer. In a particular application of the invention to telephone line transformers, the negative inductance elements are connected in the vicinity of the middle junctors of the switching net work. Thus, each element enables the parallel inductance of the line transformers to be increased when these line transformers are connected to the junctor through switches of the switching network. The number of negative inductance elements required is much lower than the number of transformers. FR9-79-017
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Patent Agency Ranking
公开(公告)号：DE3784490T2
公开(公告)日：1993-09-16
申请号：DE3784490
申请日：1987-04-22
Applicant: IBM
Inventor： BELLOC JACQUES , MORLEC EMILE , GODARD DOMINIQUE , QUINTIN MICHEL
Abstract: Echo cancelling device for providing an echo-free incoming data signal with a phase-roll tracking device comprising phase rotating means (58) for rotating the phase of the generated echo signal by a value X which is the estimated phase-roll value, thereby providing a complex phase-roll corrected echo signal a multiplier (124) for multiplying the error signal between the incoming signal and the real component (112) of the phase-roll corrected echo signal by the imaginary component (120) of the same signal, thereby providing a value Y function of the variation of the phase-roll; a phase-roll variation estimator (128) providing an estimation Z of the phase-roll variation X in half duplex mode or in full duplex mode, in response to value Y; and a phase filter (126) providing the estimated phase-roll value X in response to the estimation Z.
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公开(公告)号：IT1151017B
公开(公告)日：1986-12-17
申请号：IT2302080
申请日：1980-06-26
Applicant: IBM
Inventor： MORLEC EMILE , REYNES DANIEL , SUZZONI JEAN PIERRE
Abstract: A switching network includes electronic crosspoint switches for providing electronic connection or disconnection between two voice stations. Each station is connected to the network through a line transformer. When two stations are connected to each other, the voice path in the network includes the secondary winding of the 1st station transformer, a series of crosspoint switches, a middle junctor, a series of crosspoint switches, and the secondary winding of the 2nd station transformer. Each middle junctor includes a negative resistance circuit which introduces a negative resistance in series with the voice path, thus compensating for the series losses in the network, and two negative inductance circuits connected on both sides of the junctor in parallel with the voice path, to compensate for the parallel losses, especially those introduced by the line transformers.
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公开(公告)号：DE3069214D1
公开(公告)日：1984-10-25
申请号：DE3069214
申请日：1980-06-24
Applicant: IBM
Inventor： MORLEC EMILE , REYNES DANIEL , SUZZONI JEAN-PIERRE
Abstract: A switching network includes electronic crosspoint switches for providing electronic connection or disconnection between two voice stations. Each station is connected to the network through a line transformer. When two stations are connected to each other, the voice path in the network includes the secondary winding of the 1st station transformer, a series of crosspoint switches, a middle junctor, a series of crosspoint switches, and the secondary winding of the 2nd station transformer. Each middle junctor includes a negative resistance circuit which introduces a negative resistance in series with the voice path, thus compensating for the series losses in the network, and two negative inductance circuits connected on both sides of the junctor in parallel with the voice path, to compensate for the parallel losses, especially those introduced by the line transformers.
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公开(公告)号：CA961184A
公开(公告)日：1975-01-14
申请号：CA143389
申请日：1972-05-30
Applicant: IBM
Inventor： MORLEC EMILE
IPC: H04Q1/46
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公开(公告)号：DE2221368A1
公开(公告)日：1972-12-14
申请号：DE2221368
申请日：1972-05-02
Applicant: IBM
Inventor： MORLEC EMILE
IPC: H04Q1/46
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