Envelope cancellation in an RF circuit

A method for envelope cancellation in an RF circuit, said method comprising the steps of:

• receiving an RF input signal having a given magnitude, said RF input signal comprising an input envelope signal having a first frequency modulated on top of a carrier signal having a second frequency;
• generating a first rectified signal comprising a first direct current (DC) component that corresponds to the magnitude of said RF input signal and a first modified envelope component that is proportional to said input envelope signal;
• generating a second rectified signal comprising a second DC component that corresponds to the magnitude of said RF input signal and a second modified envelope component that is proportional to said input envelope signal and that is the inverse of said first modified envelope component;
• removing said first and second modified envelope components by adding them together and removing said second DC component to generate an output signal having a DC component that is a factor of said first DC component.