Radio-frequency CASCODE structure power amplifier with improved linearity and power added efficiency
A power-added efficiency and power amplifier technology, applied in high-frequency amplifiers, improved amplifiers to reduce nonlinear distortion, energy-saving ICT, etc., can solve the problems of increasing circuit complexity and high operating frequency, achieving simple structure and improving gain-bandwidth product , the effect of saving chip area and production cost
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[0024] Example: such as figure 1 Shown is a circuit structure diagram of a general Cascode structure power amplifier in the prior art, including a Cascode structure 2 composed of a common-emitter input transistor Q1 and a common-base output transistor Q2, from the signal input port of the power amplifier to the input The input matching network 1 connected between the bases of the transistor Q1 and the output matching network 3 connected between the collector of the output transistor Q2 and the signal output port of the power amplifier. The input matching network 1 is composed of a first capacitor C1 and an input matching circuit, and the output matching network 3 is composed of a second capacitor C2 and an output matching circuit. The input signal reaches the base of the input transistor Q1 through the first capacitor C1 and the input matching circuit, the emitter of the input transistor Q1 is grounded, the collector is connected to the emitter of the output transistor Q2, and...
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