Patent ID: 7046980

Claim:
A synthesizer for gene signals to be input to successive mixers for modulating or demodulating an input signal x(t), emulating the mixing of said input signal x(t) with a local oscillator signal having frequency f, said synthesizer comprising: a first signal generator for producing a first mixing signal φ 1 , which varies irregularly over time; and a second signal generator for producing a second mixing signal φ 2 which varies irregularly over time; where: φ 1 *φ 2 has significant power at the frequency f of said local oscillator signal being emulated; neither φ 1 nor φ 2 has significant power at the frequency f of said local oscillator signal being emulated, and said mixing signals φ 1 and φ 2 are designed to emulate said local oscillator signal having frequency f, in a time domain analysis.