Patent ID: 6727750
Filing Date: 2004-04-27
Classification: H03F

Abstract:
A method for automatically controlling the phase in a linearised electronic amplifier forming a main amplifier path receiving a signal from a signal source and having a main output, comprisingsplitting said signal (1) from said signal source (A) into a main signal (B) going to said main amplifier path (3,4,5) and a reference signal (C), said main and reference signals (B,C) having a phase difference, phase splitting said main signal (B) into first orthogonal vector components (BI/BQ), and phase splitting said reference signal (C) into second orthogonal vector components (CI/CQ), said vector components forming part of a Cartesian system, characterised by measuring the phase difference between the main signal (B) and the reference signal (C), and stabilizing said Cartesian system by rotating said co-ordinates as controlled by the phase difference and thereby minimise the phase difference.