Quadra-polar modulator

摘要: A quadra-polar modulator that is simple to implement and also provides good noise performance. The includes four amplitude modulators a combiner. Each modulates respective carrier signal with input provide output signal. combiner then combines the signals from modulated may be implemented switching amplifier, such as supply class E amplifier. Two are obtained by summing separately an inphase (I) modulating inverted I offset value. other two quadrature (Q) Q value can selected based on expected magnitude of signals. in each other.