In a polar loop based radio-communications apparatus having a phase control loop for controlling the phase of a carrier outputted from an oscillator for transmission, and an amplitude control loop for controlling the amplitude of a transmission output signal outputted from a power amplification circuit,...http://www.google.com.au/patents/US7480345?utm_source=gb-gplus-sharePatent US7480345 - Semiconductor integrated circuit for communication, radio-communication apparatus, and transmission starting method
