Method for testing resonant power amplifying circuit
A technology of power amplifier circuit and testing method, which is applied in the direction of electronic circuit testing, etc., can solve problems such as loss, irreversible breakdown damage of semiconductor power amplifier components, and achieve the effects of avoiding breakdown damage, shortening production cycle, and reducing production cost
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[0012] figure 1 Shown is a typical resonant power amplifier circuit, which includes a three-phase AC input terminal, a three-phase rectified full-bridge, a filter module, a full-bridge series resonant power amplifier module, a transformer component, a self-excited voltage-controlled oscillator and a pre-amplifier amplifier. Among them, the full bridge series resonant power amplification module is composed of a full bridge built by MOS transistors Q1-Q4, a series resonant inductor L1, and a coupling resonant capacitor C1. The input terminal of the self-excited voltage-controlled oscillator is connected to the resonant current sampling point of the full-bridge series resonant power amplifier module to form a positive feedback loop. The oscillation frequency of the voltage-controlled oscillator is controlled by the rectified and filtered DC voltage output from the secondary output of the power amplifier load transformer. The higher the output voltage, the lower the oscillation f...
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