At the evaluation board, module, and system level, a simple single ground works best. Good circuit partitioning is key. This also extends into plane and adjacent layer layout. Keep in mind that cross coupling can occur if sensitive planes are just above those noisy digital planes. Assembly is...
To reduce crosstalk from lines on the layer above, the ground plane should be run over a larger section of the same layer. The asymmetrical and central placement of the ground planes and power planes is best for your PCB. As a result, bending loads are better distributed and easier to ...
*H 2 Antenna Design and RF Layout Guidelines 2 Antenna Basics An antenna is basically a conductor exposed in space. If the length of the conductor is a certain ratio or multiple of the wavelength of the signal1, it becomes an antenna. This condition is called "resonance"...
A large portion of the power delivery network's frequency spectrum is above the series resonant frequency of the decoupling capacitors, where they are inductive. The PCB layout for decoupling capacitors is also inductive, and is a larger inductance than the capacitor itself. It is necessary to ...
This line consists of a fixed-width routing on an inner layer, with solid ground planes above and below the center conductor. The conductor can be located midway between the ground planes (Figure 2), or it can be offset (Figure 3). This is the appropriate method for RF routing on inner...
Filling all the specific information on the fab notes is very important as it documents all the vital information of the PCB design for future reference. If the board is being designed for a customer it is recommended to get approval from the customer after the above step. An example of fab...
Figure 4. A flyback regulator maintains regulation for inputs that range above and below the output voltage. Because currents at the input and the output are both discontinuous, making conducted emissions more difficult to control, noise from this converter is generally worse than that of a step...
There's also a "port" functionality which allows you to snap together geometry like Legos without caring about where exactly the absolute coordinates of either geometry is. For instance, connecting the above misaligned rectangles is a two-line command: It also allows you to do things like add ...
The tradeoff of using strip line is a lower propagation speed. 7.1.3 Stripline Impedance – Single-ended Zo = 60 æ 2H + T ö Er Lnçè1.9 0.8W + T ÷ø W = Width of the trace H = Height of the dielectric above the return plane T = Trace thickness Er = Relative ...
(e.g., one is partially above the other). For example, the vertical overlap can be controlled by a threshold, multiplied by the median width of the longest line. The threshold can be a function of the length of the line, meaning that the test might fail at first, but succeed later,...