The switching rate refers to the ability of the audio device to track or respond to the squeaking or pulse signal, and is an important parameter reflecting the transient strain capability of the power amplifier circuit. The transient distortion caused by the low switching rate is caused by the change in the output signal of the amplifier that cannot keep up with the rapid change of the input signal. If a large enough pulse signal is input to the amplifier, the maximum rate of change of its voltage should be the ratio of the voltage rise value to the required time, in units of how many volts per second, written as a digital expression of SR = V / μs. For high-fidelity power amplifiers, SR directly affects the transient response and response speed of the amplifier. The power amplifier with high SR value has good resolution, layering and positioning. It has good listening and replay of pop music. The magnitude of the SR value is related to the output voltage of the power amplifier and the output high-frequency cutoff frequency. If the output power is large, the SR value is large; if the high-frequency cutoff frequency is high, the SR value is also large, and the SR value of the high-quality power amplifier can reach 100V/μs. .
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