Patent ID: 6542037
Filing Date: 2003-04-01
Classification: H03F

Abstract:
A broadband power amplifier circuit, comprising:a single-ended-to-balanced converter configured to receive a single-ended input signal and convert the single-ended input signal to first and second balanced low level signals; at least one first cascode amplifier configured to receive the first low level signal and amplify the first low level signal to generate a first high level signal; at least one second cascode amplifier configured to receive the second low level signal and amplify the second low level signal to generate a second high level signal, the first and second high level signals being balanced signals; and a balanced-to-single-ended converter configured to receive the first and second balanced high level signals and convert the first and second balanced high level signals to a single-ended output signal, wherein the at least one first cascode amplifier and the at least one second cascode amplifier comprise respective pluralities of serially coupled cascode amplifiers, and wherein each of the first and second cascode amplifiers is fabricated using a GaAs pHEMT process.