Patent ID: 8736345

Claim:
A system for controlling one or more switches, the system comprising: a first converting circuit configured to convert a first current and generate a first converted voltage signal based on at least information associated with the first current; a second converting circuit configured to convert a second current and generate a second converted voltage signal based on at least information associated with the second current; and a signal processing component configured to receive the first converted voltage signal and the second converted voltage signal and generate an output signal based on at least information associated with the first converted voltage signal and the second converted voltage signal; wherein the signal processing component is further configured to: if the second converted voltage signal is larger than the first converted voltage signal by at least a first predetermined magnitude, generate the output signal at a first logic level; and if the first converted voltage signal is larger than the second converted voltage signal by at least a second predetermined magnitude, generate the output signal at a second logic level, the second logic level being different from the first logic level; wherein: the signal processing component includes a differential processing component and a flip-flop component; the differential processing component is configured to generate a first comparison signal and a second comparison signal; and the flip-flop component is configured to receive at least the first comparison signal and the second comparison signal.