Ultrasonic array transmitting module

The question requires
a digital sound field reconstruction system transmitter module based on an ultrasonic array.
Question Description
The "digital sound field reconstruction" in the question requirement simply means using a modulated PWM waveform to fit an analog signal and to drive the ultrasound unit.
Therefore, each ultrasonic unit corresponds to an NMOS driver circuit.
Schematic design instructions
pay attention to the correspondence between the pins of the connector and the pins of the drive circuit. Pay attention to the order of arrangement to simplify PCB wiring.
PCB design description
In this example, since the driving voltage of the ultrasonic transmitting unit does not exceed 40V, the design specifications of the circuit should also be considered based on 40V.
The maximum overcurrent of the NMOS selected in this example is about 300mA, so the traces should also be widened.
Software description:
This module has many pins and is expected to be controlled by FPGA;
physical display instructions
: physical pictures of the work, and descriptions can be added to the pictures.
The right side of the module includes the connectors that control each array element, as well as the power connector and power indicator light.
Precautions
: Here are some precautions that need to be paid attention to during the production of the work (you can omit it if there are none).
When welding, you should first weld the patch components, and then weld the pin components such as the ultrasonic transmitting unit.
Note that the NMOS driver and resistors are on the back, while the ultrasonic array element faces the front.
When welding the ultrasonic array element, you can observe whether there are polarity marks on the pins. When the arrays have the same polarity, the phase difference of sound waves between different array elements can be reduced.