G - Physics – 11 – B
Patent
G - Physics
11
B
328/22, 354/70
G11B 20/10 (2006.01) G11B 20/14 (2006.01) H03M 5/04 (2006.01)
Patent
CA 1262284
Abstract: A wave shaping circuit includes a digital sampling circuit for sampling an input signal and producing a digital signal. The sampled signal is detected by a sign detector for detecting whether it is positive or negative. A unit difference generator is provided for generating a unit difference equal to a difference increased, during one sampling cycle, in a positive or negative direction, as detected by the sign detector. A register is provided for storing a summed difference obtained in the previous sampling cycle. The summed difference is multiplied by a predetermined coefficient, which is between 0 and 1, so that the product changes exponentially. A first adder is provided for adding the summed difference multiplied by the coefficient with the unit difference. The added result is stored in the register. A second adder is provided for adding the sampled input signal with the summed signal stored in the register, and producing a corrected signal. The arrangement enables signal correction to substantially eliminate an unwanted DC component.
494669
Iwaki Tetsuo
Koyanagi Katsubumi
Sasada Taizo
Yamawaki Chiaki
Kirby Eades Gale Baker
Sharp Kabushiki Kaisha
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