Anti-interference design measures for electronic circuits in instrument manufacturing and the guarantee of stable operation of the instrumentг┐

Anti-interference design measures for electronic circuits in instrument manufacturing and the guarantee of stable operation of the instrument

Electronic circuits play a crucial role in instrument manufacturing, and their stability and reliability directly affect the performance and service life of the instrument. In actual use, electronic circuits are often subjected to various interferences, including electromagnetic interference and noise interference, which will reduce the performance of electronic circuits and even cause the instrument to fail. Therefore, anti-interference design is particularly important in instrument manufacturing.

One, understand the interference source and interference type

Interference sources include electromagnetic radiation, static electricity, power interference, etc., in the external environment, as well as unreasonable internal circuit design, poor component quality, and unreasonable wiring layout within the instrument. Interference types mainly include electromagnetic interference, noise interference, radiation interference, and power interference. Only by clearly identifying the interference source and type can effective anti-interference measures be taken.

Two, design anti-interference circuits

Power anti-interference design: power is the most important part of the electronic circuit, and the quality of power directly affects the performance of the electronic circuit. In order to reduce the interference of power to the electronic circuit, anti-interference measures such as filters and voltage regulators can be adopted. For example, using LC filters to filter out high-frequency interference signals on the power line, using voltage regulators to stabilize the power voltage, and prevent fluctuations of power voltage from affecting the circuit.

Ground anti-interference design: good grounding design can effectively suppress electromagnetic interference on the ground line. The grounding wire should be as short as possible, and the resistance of the grounding wire should be minimized. In addition, the grounding wire should be kept as far away from power lines and signal lines as possible to avoid the impact of electromagnetic interference on the grounding wire affecting signal lines and power lines.

Component anti-interference design: choosing high-quality components can reduce noise and interference generated by components during operation. For example, choosing low-noise amplifiers can reduce the noise generated by amplifiers during operation; choosing capacitors and resistors with strong anti-interference ability can reduce interference generated by components during operation.

Anti-interference circuit layout design: reasonable wiring layout can reduce electromagnetic interference between circuits. For example, try to separate the wiring of power lines, signal lines, and ground lines, avoid the proximity of power lines and signal lines; try to keep signal lines away from power lines and ground lines to reduce interference to the signal lines.

Three, improve the anti-interference ability of the instrument

Improve the protection level of the instrument: adopting shielding covers, shielding nets, and other protective measures can effectively reduce the impact of external electromagnetic interference on the instrument.

Improve the isolation ability of the instrument: adopting isolation transformers, isolation amplifiers, and other isolation devices can effectively reduce interference between signal lines.

Improve the anti-shock ability of the instrument: adopting anti-shock design can effectively reduce the impact and vibration of the instrument on the electronic circuit.

Improve the heat dissipation ability of the instrument: adopting heat dissipation design can effectively reduce the temperature of the electronic circuit, and reduce the impact of thermal noise on the electronic circuit.

By taking these measures, the anti-interference ability of electronic circuits can be effectively improved, thereby ensuring the stable operation of the instrument.