Patent ID: 7068096

Claim:
An EER amplifier for amplifying a signal, comprising: (I) a divider for dividing said signal into a phase signal and an envelope signal; (II) a first RF amplifier for amplifying said signal, said first amplifier having a bias supply input; (III) an EER modulator having input receiving said envelope signal and an output coupled to said bias supply input of said first RE amplifier, said EER modulator comprising: (A) a high frequency power operational amplifier for amplifying a high frequency portion of said envelope signal, and having an output coupled to said output of said EER modulator; (B) a high efficiency power amplifier for amplifying a remaining portion of said envelope signal, said power amplifier having: (1) a current control input, (2) a current monitoring output, (3) a power output coupled to said output of said EER modulator; (C) a feedback control loop comprising: (1) a current-to-voltage conversion amplifier having: (a) an input coupled to said current monitoring output of said high efficiency power amplifier and (b) an output, (2) an input buffer amplifier having: (a) an input coupled to receive said envelope signal and (b) an output; (3) a summing amplifier having: (a) an input coupled to the outputs of: (a) said current-to-voltage conversion amplifier and (b) said input buffer amplifier, and (b) an output coupled to said current control input of said high efficiency power amplifier.