A phase detection system (100) comprises an input terminal (101), first and second peak detectors (103, 113), an averaging unit (107), an offset unit (122), and a comparator (126). Input terminal (101) is coupled to the first and to the second peak detectors (103, 113) and provides an input signal to phase detection system (100). Averaging unit (107) is coupled between offset unit (122) and both the first peak detector and the second peak detector (103, 113), and generates an intermediate signal. Offset unit (122) is coupled to input terminal (101) and generates two comparable signals by applying a predetermined offset in signal strength to the input signal or the intermediate signal. The comparator (126) is coupled to the offset unit (122) and generates an output signal by comparing the two comparable signals which is indicative of the phase of the input signal.