Patent ID: 7301397

Claim:
A delay mismatched feed forward amplifier, comprising: an input for receiving an RF signal; a main amplifier receiving and amplifying said RF signal; a main amplifier output sampling coupler; a first delay coupled to the input and providing a delayed RF signal; a carrier cancellation combiner coupling the delayed RF signal from the first delay and the output of the sampling coupler; an error amplifier receiving and amplifying the output signal of the carrier cancellation combiner; a second delay coupled to the output of the main amplifier, wherein the error amplifier has an inherent third delay associated with a signal path therethrough and wherein said second delay is substantially less than said third delay; an error coupler combining the output of the error amplifier and a delayed main amplifier output from the second delay so as to cancel distortion introduced by the main amplifier; an output coupled to the error coupler for providing an output signal; and means for compensating for the delay mismatch between said second and third delay.