Patent ID: 7773459

Claim:
A method, said method comprising: receiving a first signal; obtaining a second signal and a third signal from said first signal, wherein a gain of said second signal is smaller than a gain of said third signal; detecting saturation in said third signal; and generating a composite signal from said second signal and said third signal, said step of generating a composite signal including selecting a part of said second signal for said composite signal, when said detecting step detects saturation in said third signal, and selecting a part of said third signal for said composite signal, when said detecting step does not detect saturation in said third signal, wherein sampling is performed for said second and third signals, and when a data point of said third signal is lower than a saturation level, said data point is selected for said composite signal, and when a data point of said third signal is equal to or higher than said saturation level, a corresponding data point from said second signal is selected for said composite signal.