Problems And Considerations In PCB Design It's Here

Problems And Considerations In PCB Design It's Here

Abstract

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 analog 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.

 

Content

1.Problems and Considerations in  PCB Design

2.Others

 

 

1.Problems and Considerations in PCB Design

 

1.1

First of all, it is a common practice to connect carry analog signals to be as separated. As much as possible from the regions in PCB design board. Where digital signal connections take place.

 

1.2

But on the other hand analog signals are sensitive to this kind of radiation resulting in interference between signals. Which can make the whole circuit dysfunctional in the worst case.

 

1.3

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.

 

Problems and Considerations in PCB Design1.png

 

1.4

C is the capacitance created in the dielectric region between the two signals. After analog signals taken from the inputs of piezotronic sensors. They are converted into digital using ADC’s. Current continually.  Rrapidly 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.

 

Problems and Considerations in PCB Design2.png

 

 

2.Others

Other common practices to reduce coupling (transfer the energy from one wire to another. Through the changing electromagnetic field). This is the routes of signals as in the PCB design. Using a whole layer in PCB. As ground helps reduce route lengths targeting ground at minimal level.

 

 

Flickr photos from the group WELLPCB Project