Patent ID: 8890585
Filing Date: 2014-11-18
Classification: H03B,H03K

Abstract:
1. A frequency multiplier for providing an output signal in response to an input signal, and comprising: a waveform generator for generating a waveform in response to the input signal; a slicer coupled to the waveform generator for inducing transitions in the output signal whenever the waveform crosses each of a plurality of reference levels; a plurality of comparators, wherein each of the comparators is coupled between the waveform generator and the slicer, and is arranged to provide a comparison result in response to a comparison between the waveform and one of the reference levels; the slicer is arranged to induce transitions in the output signal in response to the comparison results of the comparators and a plurality of selection circuits, wherein each of the selection circuits is coupled to one of the comparators, and is arranged to provide one of the reference levels by selecting it from a plurality of candidate reference levels.