Patent ID: 8000195

Claim:
A signal processing system for use in an electronic system having a storage unit, an indicator light, and a disk driving circuit, wherein if the electronic system does not access the storage unit for data, the signal processing system will drive the indicator light of the electronic system to light up, the signal processing system comprising: a first signal processing unit electrically connected to the disk driving circuit and configured to receive, while the electronic system is accessing the storage unit for data, a first pulse signal generated by the disk driving circuit, charge/discharge and transform the first pulse signal received, so as to generate and output a second pulse signal; a second signal processing unit configured to receive the second pulse signal outputted by the first signal processing unit, charge/discharge and transform the second pulse signal received, so as to generate and output a third pulse signal; and a signal computing unit for receiving the second and third pulse signals outputted by the first and second signal processing units and computing the second and third pulse signals received so as to generate a fourth pulse signal for driving the indicator light of the electronic system to glitter at a frequency suitable for a user to perceive, wherein the first signal processing unit comprises: a signal buffer unit for receiving the first pulse signal outputted by the disk driving circuit, buffering the first pulse signal received so as to maintain outputted signal amplitude, and then outputting the first pulse signal buffered; a first charging/discharging unit for receiving the first pulse signal buffered and outputted by the signal buffer unit and charging/discharging with respect to the first pulse signal buffered and received so as to generate and output a first charging/discharging signal; and a first signal transformation unit for receiving the first charging/discharging signal outputted by the first charging/discharging unit, transforming the first charging/discharging signal received into the second pulse signal, and outputting the second pulse signal.