Isolating interface with a differentiating circuit comprising a capacitive barrier and method for transmitting a signal by means of such isolating interface
A differential circuit and capacitive technology, applied in the direction of line transmission components, transmission line coupling devices, baseband system components, etc., can solve problems such as interference and achieve satisfactory signal transmission effects
Active Publication Date: 2013-03-27
AMS INT
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Isolated interface ii' with a differential circuit comprising a capacitive barrier for parallel bidirectional symmetrical signal transmission 2sst The disadvantage is that communication by means of it can be disturbed due to crosstalk in the case of high parasitic conductivities
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[0018] Isolation interface of the present invention ii 2sst expressed in Figure 4 , and only one side of which is shown, the isolated interface ii 2sst With a differential circuit comprising a capacitive barrier for parallel bidirectional symmetrical signal transmission by means of copies of signals in opposite phase to each other, the isolated interface ii 2sst is located to the right with respect to the interface boundary IB, and is at the figure 2 The known isolated interface ii′ represented in 2sst an improvement of .
[0019] It comprises a first transmitting circuit and a first receiving circuit rc1 for the first communication direction 1 , and a second transmitting circuit tc2 and a second receiving circuit for the second communication direction 2 . The first receiving circuit rc1 is respectively provided in any path symmetrically arranged with respect to the ground potential: a first differential circuit r+1, C+1 and a second differential circuit r-1, C-1, and thes...
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A known method for parallel two-way symmetrical signal transmission by means of an isolating interface with a differentiating circuit comprising a capacitive barrier is improved. When restarting communication in the selected direction after a longer break, a pilot signal is conducted via the transmitting plates for the communication in the reverse direction and capacitive compensators to one of the receiving plates for communication in the selected direction. Threshold levels for comparisons of the signals of the first and second time derivative are decreased, the capacitance of capacitive compensators is then set to reduce output the output signal and finally communication is reestablished. Transmitting plates for communication in the reverse direction are now connected to the receiving plates for communication in the selected direction through the capacitive compensators with the capacitance adjusted as described above. This provides satisfactory signal transmission even when a thick layer of an electrically well conductive liquid appears between the plates of the isolating interface.
Description
technical field [0001] The invention relates to an isolating interface with a differential circuit comprising a capacitive barrier, and to an isolating interface which, under the most necessary conditions, like in the case of penetration of a conductive liquid between the plates of the isolating interface, by means of such an isolating interface method for signal transmission. Background technique [0002] Isolated interfaces with capacitive barriers are often used for contactless signal transmission. Known isolation interfaces of this kind work satisfactorily in environments where the parasitic capacitance and especially the parasitic conductivity are low. [0003] Known isolation interface ii′ with capacitive barrier 1sst expressed in figure 1 In (EP 0744750 and WO / 2006 / 045148), the isolation interface ii' 1sst The unidirectional symmetrical signal transmission takes place by means of signal replicas in opposite phases of each other in two parallel paths. Isolation in...
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IPC IPC(8): H04L25/02H04B3/32
CPCH04L25/0266H04B3/32
Inventor 温科·昆茨安德烈·沃多皮韦茨
Owner AMS INT