H - Electricity – 03 – D
Patent
H - Electricity
03
D
329/22
H03D 1/00 (2006.01) H04L 25/06 (2006.01) H04L 27/06 (2006.01)
Patent
CA 1241390
- 34 - ABSTRACT An input multi-level amplitude signal of 2M levels is supplied via a DC level controller to an AD converter for conversion into an N-bit (N being an integer greater than M) digital signal, and M high-order wits of the digital signal are provided as decided outputs. It is decided by a decision means whether a deviation of the DC level of the multi-level amplitude signal at the input side of the AD converter is in excess of a predetermined value. when the deviation of the DC level is decided less than the predetermined value, the outputs of bits less significant than the Mth bit in the digital signal are integrated for input as a DC level control signal into the DC level controller, correcting the deviation of the DC level. When it is decided by the decision means that the deviation of the DC level is greater than the predetermined value r at least one of the M high-order bit outputs in the output digital signal is integrated for input as a DC level control signal into the DC level controller, correcting the deviation of the DC level.
475068
Nakamura Yasuhisa
Saito Yoichi
Kirby Eades Gale Baker
Nippon Telegraph And Telephone Corporation
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