Patent ID: 6646504
Filing Date: 2003-11-11
Classification: H03F

Abstract:
An RF wideband amplifier system comprising:an M way splitter for receiving an RF input signal and splitting same into M RF signals for respective application to M power amplifier modules PAM-1 to PAM-M that amplify said M signals and apply the amplified M signals to an M way combiner that applies an amplified RF signal to a load; a single main controller that provides a single automatic level control reference signal, representative of the desired output power level of each of said power amplifier modules; each said power amplifier module including an 2*N way balanced splitter that receives one of said M RF signals and splits said signal into 2*N signal portions; 2*N RF amplifiers that respectively receive said 2* N signal portions and amplify same and provide therefrom 2*N amplified signal portions; an 2*N way RF combiner that receives and combines said amplified RF signal portions and provides therefrom a combined amplified output RF signal; a power detector that provides a power signal representative of the level of the output power of said power amplifier module; a difference circuit that provides an attenuation control signal having a value in accordance with the difference in values of said power signal and said reference signal; and, a variable adjuster that adjusts the magnitude of said one of said M RF signals in accordance with said difference.