Patent ID: 8068540

Claim:
A Cartesian modulation system for producing an RF output signal, containing an RF carrier and modulated by a base-band signal, the system comprising: a first binary pulse width modulated signal generator for receiving signals related to the in-phase component of a base-band signal comprising at least one base-band pre-distortion element and at least one signal comparator, and producing a first binary pulse width modulated signal carrying the in-phase information of the base-band signal; a second binary pulse width modulated signal generator for receiving signals related to the quadrature component of a base-band signal, comprising at least one base-band pre-distortion element and at least one signal comparator, and producing a second binary pulse width modulated signal carrying the quadrature information of the base-band signal; and a combination and amplification stage for combining the first binary pulse width modulated signal and second binary pulse width modulated signal and providing an amplified three-level pulse width modulated radio frequency signal carrying the in-phase and quadrature components of the base-band signal.