TH22369A - A device used to increase the value of the phase rotation in the final expansion. - Google Patents

Abstract

A device for increasing the phase rotation (0) in the feedback circuit of the Cartesian feedback power amplifier (PA) in the transmitter at the end. That includes paths (18 20 22) for quadratic modulation of mixed differential signals between mixed inputs (IQ) and corresponding mixed anti-reverse signals (IQ) with mixed modulation signals. For generating the signal that one has The modulated true value (IFE) and the path (22 32 34) for the second true square-wave modulation (IFF) from the power amplifier (PA) with good signal. Mixed modulation for Generate mixed feedback (I Q) A path (36) is provided to detect the phase shift between the first signal (IFE) and the second signal (IFF) and between the quadratic components of the The first signal (IFE) and the second signal (IFF) to determine the phase rotation (0) of the feedback circuit. Moreover, the way (38) method is provided for the phase rotation of The modulation signal is mixed with a phase cycle increasing at Determined by the given phase rotation (0)

Claims (1)

1. A device used to increase the phase-rotation factor (0) in the feedback circuit of the Cardesian feedback power amplifier (PA) in the transmitter at the final stage. Where it contains - paths (18 20 22) for quadratic modulation mixed signals (IQ) between mixed inputs (IQ) and matched mixed feedback (IF QF) signals with modulated signals. Mix To create a first signal with modulated true values (IFE) and - paths (22 32 34) for quadratic modulation. The second with the true value (IFF), which depends on the signal taken from the antenna: