Patent attributes
A device for generating a periodic clock signal according to the invention comprises a bandpass filter is disclosed. In one embodiment, the bandpass filter includes a bandpass filter input for receiving an input signal and a bandpass filter output for outputting a bandpass filter signal. The device includes further a comparator. A comparator has at least one comparator input receiving the bandpass filtered signal and a comparator output for outputting the clock signal. The comparator is adapted to output a first signal level at the comparator output, if the bandpass filtered signal exceeds a reference level. A zero crossing of the bandpass filtered signal may be used as reference level. A second signal level is output at the comparator output if the bandpass filter signal falls below the reference level. The output signal of the comparator is the clock signal.
