Patent ID: 7129883
Filing Date: 2006-10-31
Classification: H03M,H04N

Abstract:
1. A method for analog-to-digital converting, into digital data, a difference signal component, representing a difference between a standard component and a signal component, of an analog signal to be processed containing the standard component and the signal component, the method comprising: a first step and a second step performed subsequent to the first step, wherein the first step comprises comparing a signal corresponding to one of the standard component and the signal component with a reference signal for generating the digital data, performing a counting operation in one of a down-count mode and an up-count mode in parallel with the signal comparison operation, and then storing the resulting count at the moment the comparison operation is completed, the second step comprises comparing the other of the standard component and the signal component with the reference signal, performing a counting operation in the other of the down-count mode and the up-count mode in parallel with the signal comparison operation, and then storing the resulting count at the moment the comparison operation is completed, the comparison operation and the counting operation in the first step are performed on the standard component, and the comparison operation and the counting operation in the second step are performed on the signal component.