What is 2point perspective?
Two-point perspective: Lines that converge on two vanishing points. Linear Perspective: A technique for representing three-dimensional space on a flat surface. Vanishing Point: The point in space where items seem to disappear. Vertical Lines: Straight lines drawn from top to bottom.
What are perspective drawings?
Perspective drawing is a technique to create the linear illusion of depth. As objects get further away from the viewer they appear to decrease in size at a constant rate. The box in the sketch below appears solid and three dimensional due to the use of perspective.
What is the effect of the ground plane?
The effect of the ground plane is to significantly reduce the common ground impedance Z G, by between 40 – 70dB. The actual improvement is not as great as this because the return current spreads out to some extent from directly underneath the signal track. Figure 5.14. Crosstalk equivalent circuit
Which is more important ground plane or power plane?
Although the ground plane has the most important impedance role, both ground planes and power planes appear as low-impedance paths for signals and can help reduce noise in a circuit. The return signal follows the path of least impedance to the power supply return.
Why is the impedance of the ground plane important?
Maintaining low impedance for all areas of the ground plane for the entire PCB improves power control and signal quality. Although the ground plane has the most important impedance role, both ground planes and power planes appear as low-impedance paths for signals and can help reduce noise in a circuit.
What happens to the ground plane at high frequencies?
At high frequencies, and this includes digital logic edge transitions, current tends to follow the path that encloses the least magnetic flux, and this means that the ground plane return current will prefer to concentrate under its corresponding signal track. Figure 2.22.