On Problems And Considerations In PCB Design, PCB Design devices demonstrate the effect of material polarization due to mechanical stress or deformation of the material and vice-versa. This phenomenon can be exploited to get sensor data of temperature, mechanical pressure, vibration etc. Or using the opposite mechanism to control actuators.
Negative effects generated by or acting into analogue signals. It should be taken carefully into consideration. When designing the PCB board and selecting its assembly components.
This article will describe in short. Some of those issues and solutions commonly used to avoid or minimize the negative effect.
1.Problems and Considerations in PCB Design
First of all, it is a common practice to connect carry analogue signals to be as separated. As much as possible from the regions in the PCB design board. Where digital signal connections take place.
But on the other hand, analogue signals are sensitive to this kind of radiation resulting in interference between signals, making the whole circuit dysfunctional in the worst case.
Besides that, two wires carrying digital signals can result in loss of performance as well. This effect is caused because of the capacitance generated between two wires carrying current. As illustrated in the left figure.
C is the capacitance created in the dielectric region between the two signals. After analogue signals taken from the inputs of piezotronic sensors. They are converted into digital using ADC’s. Current continually. Rapidly changes in the wire, thus generating inductance.
This causes noisy currents in the other wire. One of the solutions commonly used is utilizing a CMOS Buffer Integrated Circuit. Which by letting all signals pass through the buffer. As illustrated in the right figure.
2.Problems And Considerations In PCB Design—Others
Other common practices reduce coupling (transfer the energy from one wire to another. Through the changing electromagnetic field). These are the routes of signals as in the PCB design. Using a whole layer in PCB. As ground helps reduce route lengths targeting ground at a minimal level.