Crossover distortion elimination method and device, circuit, computer and storage medium

Abstract

The embodiment of the invention discloses a crossover distortion elimination method, a crossover distortion elimination device, a circuit, a computer and a storage medium. The method comprises the steps of acquiring a first input waveform and a second input waveform of a push-pull amplifier circuit; separately controlling direct current bias of the first input waveform and the second input waveform according to a preset first direct current bias value and a preset second direct current bias value; acquiring an actual output waveform of the push-pull amplification circuit; sampling the actual output waveform, the first input waveform and the second input waveform to determine a corresponding actual output waveform array, a corresponding first input waveform array and a corresponding secondinput waveform array, and determine the input waveform array which is inphase with the actual output waveform; determining a standard output waveform array according to a preset amplification factor and the input waveform array; and adjusting the first direct current bias value and / or the second direct current bias value according to the difference between the actual output waveform array and thestandard output waveform array to eliminate the difference. Therefore, the amplification performance of the push-pull amplification circuit is improved.

Description

technical field [0001] Embodiments of the present invention relate to signal processing technologies, and in particular to a crossover distortion elimination method, device, circuit, computer and storage medium. Background technique [0002] In the power amplification control system, especially in the ultrasonic control system, the shape of the output waveform of the amplification circuit has a great influence on the performance of the ultrasonic transducer. Usually, the push-pull amplifier circuit used in the power amplifier control system has a certain crossover distortion in the output waveform of the amplifier circuit due to the existence of junction voltage or conduction voltage in the triode or field effect tube, which causes the ultrasonic transducer to work in The state of distortion affects the control of the control system on the ultrasonic transducer, and even breaks and damages the piezoelectric ceramic transducer. [0003] In order to avoid crossover distortion...

AI Technical Summary

Problems solved by technology

However, as the temperature of the triode or field effect tube rises, the on-resistance drop changes. At this time, the fixed DC bias will directly affect the linear amplification region of the triode or field effect tube, thereby reducing the amplification of the push-pull amplifier circuit. performance

Moreover, due to the existence of DC bias in the circuit, no matter whether the triode or field effect tube is in the on state or the off state, the triode or field effect tube is in the slightly on state, which makes the power consumption high and greatly reduces the service life

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