Patent ID: 9065458
Filing Date: 2015-06-23
Classification: H03B,H03L

Abstract:
1. A local oscillator, comprising: a signal source for generating an input signal having a prescribed frequency; a first oscillator and a second oscillator coupled via a first signal path with the signal source; an array of frequency dividers coupled via a second signal path with the signal source; at least one frequency multiplier coupled to at least one of the frequency dividers; and a switch coupled to the array of frequency dividers and the at least one frequency multiplier, wherein in use, the frequency dividers and the at least one multiplier are operable to generate a plurality of harmonic frequencies coherent with the prescribed frequency for selectively combining with output from the oscillators on the first signal path to generate an output signal having a target frequency, the switch being operable to select which of the plurality of harmonic frequencies is to be combined, and, wherein the array of frequency dividers and at least one multiplier are arranged to generate the harmonics frequencies such that they are evenly spaced relative to each other.