How to reduce its own noise and interference and improve output quality by optimizing the circuit design of Programmable Standard Power Source?
Publish Time: 2024-08-10
The optimization of the circuit design of Programmable Standard Power Source is crucial to reduce its own noise and interference and improve output quality.
First of all, in terms of circuit layout, the positions of various components should be arranged reasonably. Components that are prone to noise, such as transformers, inductors, etc., should be arranged as far as possible from components that are sensitive to noise, such as control chips, precision amplifiers, etc., to reduce electromagnetic coupling. Use a layered layout to separate the power layer and the signal layer, and prevent interference propagation between different layers through reasonable grounding and shielding measures. For example, using a large area of ground plane can reduce ground impedance and reduce noise caused by ground loops.
For the power supply filtering link, appropriate filter capacitors and inductors should be selected. A low-pass filter is connected to the input end to filter out high-frequency noise from the power grid. At the same time, an appropriate filter circuit is also configured at the output end of the power supply to eliminate the ripple and high-frequency noise generated by the power supply itself. The selection of capacitors should take into account their capacity and withstand voltage value, and capacitors with different capacitance values can be combined in parallel to cover a wider frequency range for filtering.
In the grounding design of the circuit, the use of single-point grounding or multi-point grounding should be reasonably selected according to the specific situation. For high-frequency circuits, single-point grounding can avoid the formation of ground loops and reduce the introduction of noise. For complex large-scale circuits, a mixed grounding method may be required. In addition, a shielding cover can be added to the circuit to block the influence of external electromagnetic interference on the power supply circuit, while also preventing the noise inside the power supply from radiating outward.
In the control circuit part, optimizing the control algorithm can also help reduce noise. Using a more precise feedback control method, real-time monitoring of output voltage and current, rapid and accurate adjustment of deviations, and reducing fluctuations and noise caused by inaccurate control. In short, by comprehensively optimizing the circuit layout, filtering, grounding and control algorithm of the Programmable Standard Power Source, its own noise and interference can be effectively reduced, the output quality can be improved, and the needs of testing and using various high-precision electronic equipment can be met.
