The parasitic capacitance value, which greatly affects the propagation loss of radiated electromagnetic noise, can be calculated by Q3D
or another simulator, if a three-dimensional CAD model of each object is provided.
The ICH Q3D
document describes a number of scenarios by which the NDA/ANDA holder can demonstrate that the drug product contains levels of El below the PDE and ensure that it will remain compliant throughout its life cycle.
The layout of four HEMTs in parallel is modeled in ANSYS Q3D
with the power loop and gate-driver loop inductance evaluated in Fig.
g] are model elements for the DC supply loop and their values were extracted from Ansys-Ansoft Q3D
as 4 nH, 0.
This model is composed of the electric model generated by Q3D
Extractor, representing the parasitic elements, and the electric models of the semi-conductors.
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With the PCB trace parasitic elements that are extracted by Ansys Q3D
and the equivalent model of the 100-nF decoupling capacitor, the equivalent circuit shown in Figure 4(b) can confirm the measured input impedance response of the DC supply loop.
The data for the graph was generated applying the Ansoft Q3D
software, which allows modeling and simulation of both rectangular and trapezoidal trace cross sections.
6) Other useful guidance documents include ICH Q3A - Q3D
Impurities and ICH Q6A - Q6B Specifications.
We use the Ansoft Q3D
to assess the parasitic capacitances against different void sizes.