What is the working state of the linear voltage regulator tube?
Linear stabilized power supply is a common power supply design that can provide stable DC voltage output. In the linear regulated power supply, the regulator is one of the key components, which is mainly responsible for regulating the input voltage and stabilizing the output voltage. Adjusting the working state of the regulator has a significant impact on the performance and stability of the entire linear power supply.
Magnified state:
In the amplified state, adjusting the input voltage of the transistor will cause a corresponding change in the output voltage, which is a basic requirement for the operation of a linear regulator power supply. In the enlarged state, the input-output characteristic curve of the adjustment tube is linear. When the input voltage increases, adjusting the transistor amplification factor will take effect, and the output voltage will also increase accordingly. On the contrary, when the input voltage decreases, the output voltage will also decrease accordingly. The amplification state is the normal working state of the adjustment tube, which can ensure the stability of the output voltage.
Saturation state:
When the amplitude of the input voltage of the adjustment tube is too large, the adjustment tube will enter a saturation state. In a saturated state, the input-output characteristic curve of the adjustment tube enters the horizontal region, and at this point, the adjustment tube is no longer able to further amplify the input signal. When the input voltage exceeds a certain threshold, the regulator will no longer be able to provide a stable output voltage, resulting in fluctuations or instability of the output voltage. Therefore, saturation state is a state that should be avoided during the operation of the regulating tube.
Deadline status:
When the amplitude of the input voltage of the adjustment tube is too small, the adjustment tube will enter the cutoff state. In the cut-off state, the output voltage of the input-output characteristic curve of the adjustment tube remains basically unchanged. When the input voltage is below a certain threshold, the regulator cannot continue to amplify the input signal, and the output voltage will become unstable. Therefore, the cut-off state is also a state that should be avoided in the adjustment of management work.
In order to ensure that the adjustment tube is in an amplified state and maintain a stable output voltage, some measures are usually required. Among them, negative feedback circuit is a commonly used method. The negative feedback circuit, through appropriate design and adjustment, feeds back the difference signal generated between the input and output of the adjustment tube to the input terminal of the adjustment tube through the negative feedback loop, thereby suppressing the nonlinear behavior of the adjustment tube and maintaining its stable linear amplification characteristics.
In addition, the working state of the adjustment tube is also affected by the stability of the loop. Loop stability refers to the closed response of the feedback loop between the regulator and the load to the input signal and the stability of the output voltage. By using appropriate loop compensation and suppression of interference signals, the stability of the regulator can be improved, and the performance of the linear regulator can be further optimized.
In summary, the working states of the regulating tube in a linear regulator power supply include amplification state, saturation state, and cutoff state. The amplification state is the normal working state of the adjustment tube, which can ensure the stability of the output voltage; Saturation and cutoff states should be avoided as much as possible, as they can cause fluctuations or instability in the output voltage. By taking appropriate measures and designs, such as optimizing negative feedback circuits and loop stability, the stability and linear amplification characteristics of the regulator can be improved, thereby achieving stable linear regulated power output.
