For NPN single transistor * * * emitter amplifier circuit, saturation distortion means that the positive half wave of the input signal exceeds the amplification ability of the triode, resulting in distortion, and the corresponding output waveform is the bottom distortion of the output waveform, that is, when the triode enters the saturation region, Q is set too high. Solutions to saturation distortion are:

1, increase VCC because the fundamental reason of transistor saturation is that the collector junction has insufficient ability to collect electrons. Increasing VCC can enhance the collector's ability to collect electrons, but it must be ensured that VCC is within the tolerable range of the transistor, and saturation distortion can be eliminated under the condition that RC and transistor are unchanged.

2. Increase the base resistance RB, reduce the base current, and make the collector current IC=βIB. When the collector resistance RC and the collector power supply VCC remain unchanged, the collector voltage obtained by VCE=VCC-βIBRC becomes larger, thus enhancing the collector's ability to collect electrons and eliminating saturation distortion.

Extended data:

The voltage value of the output current direction of electronic equipment is not equal to the input voltage and output voltage of all equipment, and there is a voltage drop in the process.

Because the transistor enters the saturation region within a certain time when the input signal approaches the peak value in the positive half cycle, the dynamic current of the collector produces top distortion, and the voltage waveform on the collector resistor produces the same distortion.

Output voltage has two meanings:

1, when there is no load, the net output is the open circuit voltage difference between the two ends of the circuit;

2. It is the pressure difference between the two ends of the output under load.

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