Patent ID: 9473079
Filing Date: 2016-10-18
CPC Classification: H03F

Claim Text:
1. A power amplifier adapted for amplifying an input signal to generate an output signal, said power amplifier comprising: a number (N) of power amplification modules, each of which includes an input terminal and an output terminal, where N is a positive integer greater than one; wherein equivalent input impedances seen respectively into said power amplification modules from said input terminals thereof are the same, and equivalent output impedances seen respectively into said power amplification modules from said output terminals thereof are the same; and wherein said input terminals of said power amplification modules are coupled together for receiving the input signal, said output terminals of said power amplification modules are coupled together for outputting the output signal, and each of said power amplification modules amplifies a portion of a power of the input signal to obtain a portion of a power of the output signal; wherein each of said power amplification modules further includes: a first impedance matching unit coupled to said input terminal for determining the equivalent input impedance seen into said power amplification module from said input terminal; a second impedance matching unit coupled to said output terminal for determining the equivalent output impedance seen into said power amplification module from said output terminal; an amplification unit coupled between said first and second impedance matching units for amplifying the portion of the power of the input signal to obtain the portion of the power of the output signal; a third impedance matching unit to couple said amplification unit to a power supply; and a fourth impedance matching unit to couple said amplification unit to ground; wherein said third and fourth impedance matching units cooperating with said first impedance matching unit to determine the equivalent input impedance seen into said power amplification module from said input terminal, wherein said third and fourth impedance matching units cooperating with said second impedance matching unit to determine the equivalent output impedance seen into said power amplification module from said output terminal, wherein said amplification unit of each of said power amplification modules includes: a transistor having a first terminal coupled to said second and third impedance matching units, a second terminal coupled to said fourth impedance matching unit, and a control terminal coupled to said first impedance matching unit.