Patent ID: 7743311
Filing Date: 2010-06-22
Classification: G11B,H03M

Abstract:
1. A combined encoder/syndrome generator circuit comprising: a first adder chain circuit block coupled to receive an input sequence, the first adder chain circuit block comprising first adder stages that generate syndromes during a decoding mode; a second adder chain circuit block coupled to receive the input sequence, the second adder chain circuit block comprising second adder stages that generate syndromes during the decoding mode, wherein the first and the second adder chain circuit blocks generate separate outputs in parallel that are used to generate check symbols during an encoding mode, and a current output of the second adder chain circuit block is dependent on a previous output of the first adder chain circuit block; and a first adder coupled to the outputs of the first and the second adder chain circuit blocks, wherein the first adder adds the generated syndromes from the first and the second adder stages.