In a transmitter of polar-loop architecture having a phase control loop and an amplitude control loop, as loop filters for controlling a loop band of the amplitude control loop, a first filter with lag-lead characteristics (secondary or more filter including a capacitor and a resistor) and a second filter...http://www.google.com.au/patents/US20050176388?utm_source=gb-gplus-sharePatent US20050176388 - Transmitter and wireless communication apparatus using the transmitter
