Patent ID: 7796719

Claim:
A signal detection apparatus for detecting whether an input signal of a set of serial advanced technology attachment (ATA) signals is an out of band (OOB) signal, the signal detection apparatus comprising: a calibrated clock generation device for generating a sampling clock signal according to a predetermined clock signal; a signal processor for generating a plurality of detection results based on the sampling clock signal and the input signal, the signal processor comprising a waveform simplification module for receiving the input signal and for generating a simplified control signal according to an enveloped curve connecting a plurality of peaks of the input signal, and the signal processor comprising a sampling module for receiving the sampling clock signal and the simplified control signal, the sampling module further sampling the simplified control signal based on the sampling clock signal to generate the plurality of detection results; and a logic determination device for receiving the plurality of detection results and for determining whether the input signal is the out of band signal.