System and method for generating balanced signals with arbitrary amplitude and phase control using modulation

摘要

Differential (balanced) drive signals are created where at least one of the drive signals can be controlled in phase relative to the other, and both of which could be controlled in amplitude. In one embodiment, a coherent signal is generated in a first electronic signal generator (ESG) and applied to a second ESG. The coherent signal replaces the normal input signal of the second ESG and the I and Q inputs of the second ESG controls the amplitude and phase of the output signal. This output signal, when combined with the output signal of the first ESG is a differentially balanced signal having both amplitude and phase control.