Broadband power amplifier circuit

Abstract

The invention discloses a broadband power amplifier circuit, comprising a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, a first triode, a second triode, a third triode, a fourth triode, a first inductor, a second inductor and an operational amplifier. The broadband power amplifier circuit has the advantages that the power amplification efficiency is high, the oscillation generated due to distributed capacitance feedback is effectively reduced, the amplification performance is stable, the intermodulation distortion is small, the harmonic distortion is small and the working frequency band range is wide; meanwhile, according to the broadband power amplifier circuit, the circuit structure is simple, fewer components are used, the manufacture cost is reduced, and a wide use value is obtained.

Description

technical field [0001] The invention relates to a broadband amplifier circuit, in particular to a broadband power amplifier circuit. Background technique [0002] With the development of society, the application of broadband power amplifiers began to expand from military to civilian use, and currently occupies an important position in the fields of wireless communication, network data transmission, satellite positioning systems, optical transmission systems, etc.; in the design of port matching of traditional narrowband power amplifiers , it is generally designed according to low noise or conjugate matching, so as to obtain low noise amplification or maximum output power, but under broadband conditions, the change of input and output impedance is relatively large, at this time using conjugate The concept of matching is inappropriate; most of the broadband power amplifiers currently designed have complex circuit structures, the power amplification efficiency is not high enoug...

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Problems solved by technology

[0002] With the development of society, the application of broadband power amplifiers began to expand from military to civilian use, and currently occupies an important position in the fields of wireless communication, network data transmission, satellite positioning systems, optical transmission systems, etc.; in the design of port matching of traditional narrowband power amplifiers , it is generally designed according to low noise or conjugate matching, so as to obtain low noise amplification or maximum output power, but under broadband conditions, the change of input and output impedance is relatively large, at this time using conjugate The concept of matching is inappropriate; most of the broadband power amplifiers currently designed have complex circuit structures, the power amplification efficiency is not high enough, and the circuit will also oscillate due to the feedback of distributed capacitance, which is not conducive to signal amplification

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