Design method of radio frequency amplifier circuit and radio frequency amplifier circuit

Abstract

The invention discloses a radio frequency amplifier circuit design method and a radio frequency amplifier circuit, and the method comprises the steps: obtaining a bias condition when a radio frequency amplifier works in a specified class, and controlling the radio frequency amplifier to be biased to the specified class; obtaining a radio frequency small signal S parameter of the radio frequency amplifier under a specified class through testing; obtaining an input equivalent circuit based on the radio frequency small signal S parameter; the input equivalent circuit comprises a first inductor, a first resistor and a first capacitor which are connected in series; the load-pull impedance of the radio frequency amplifier under different frequencies is obtained through testing; based on the load-pull impedance, an output equivalent circuit is obtained; the output equivalent circuit comprises a second inductor, a second resistor and a second capacitor; the second resistor and the second capacitor are connected in parallel and then are connected in series with the second inductor. According to the design method, based on the application characteristics of the amplifier, the circuit design process is optimized, the convergence problem is solved, and the amplifier design efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of amplifier design, in particular to a design method of a radio frequency amplifier circuit and the radio frequency amplifier circuit. Background technique [0002] Traditional design methods for amplifier circuits (such as MMIC, monolithic microwave integrated circuits) generally include: [0003] After obtaining the PDK (Process Design Kit) model of the manufacturer, the designer first conducts IV simulation to obtain the static operating point (see figure 1 shown); and then perform load-pull (when the power amplifier is working with a large signal, the optimal load impedance of the transistor will change significantly with the increase of the input signal power; therefore, it is necessary to use the Smith chart for different When the input power level is given, the equal output power curve at different load impedances is drawn every time an input power value is given to help find the optimal load impeda...

AI Technical Summary

Problems solved by technology

[0008] The above steps not only have a huge measurement workload, but also the fitting of mathematical functions is extremely complicated, which leads to problems such as non-convergence in the design process for designers

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