H - Electricity – 03 – M
Patent
H - Electricity
03
M
328/0.2
H03M 13/00 (2006.01) H04L 27/01 (2006.01) H04L 27/148 (2006.01)
Patent
CA 1211799
ABSTRACT OF THE DISCLOSURE Digital signals which are sent each with their own frequency are corrected for frequency-dependent attenua- tion of the transmitting medium in a filter so as to main- tain a desired relationship between the amplitudes of the signals after the filter. Difference circuits, the output signals of which control the filter means, obtain signals on their first inputs from a common voltage supply circuit and signals on their second inputs from a voltage supply cir- cuit for each of the output signals. A decoder sends a control signal associated with the respective digital sig- nal. The control signals reset switches whereby the volt- age supply circuits obtain signals from an amplitude detec- tor corresponding to the respective frequency in the trans- mitted signal. Each of the output signals fed to the fil- ter by the difference circuits thus corresponds to a digital signal.
467679
Jarnestedt Goran
von Campenhausen Rolf
Marks & Clerk
Telefonaktiebolaget Lm Ericsson
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