How to reduce the switching drive noise of an electrical force measurement switch (PMS)?

Noise in PMS switch driver circuits mainly manifests as gate ringing, ground bounce, and glitches in the drive power supply. This noise can lead to erroneous switching of the switching transistor or damage to the driver IC. Reducing noise requires a multi-pronged approach. First, optimize the bypass of the driver IC: place a low-ESL ceramic capacitor (e.g., 0.1μF 0402) and a slightly larger capacitor (e.g., 10μF) near the VCC and GND pins of the driver IC to provide instantaneous current and filter out noise. Second, connect a resistor Rg (typically 5-50Ω) in series between the drive output and the gate, and connect a smaller resistor (e.g., 10kΩ) in parallel between the gate and source to accelerate turn-off discharge. To suppress parasitic conduction caused by Miller capacitance, an active pull-down circuit can be added to the output of the driver IC. The driver IC's ground should be directly connected to the source pin of the switching transistor via a separate trace, rather than through a common ground plane. Furthermore, a separate winding or DC/DC module can be used to power the driver circuit, isolating it from the main control circuit. These measures can suppress the gate ringing voltage amplitude from over 10V to below 2V, and reduce the noise on the drive power supply to below 100mVpp, ensuring accurate and reliable switching action.