The present invention relates to a polar modulation apparatus and method, in which a polar-modulated signal is generated based on separately processed phase modulation (PM) and amplitude modulation (AM) components of an input signal. An amplified polar modulated output signal is generated in accordance...http://www.google.com/patents/US8106720?utm_source=gb-gplus-sharePatent US8106720 - Polar modulation apparatus and method with common-mode control
