
SPICE 
Circuits are analysed using mainly ORCAD's PSPICE tool which is upward compatible to Cadence products. We also use component manufacturer's simulation tools when model is not available for PSPICE. This might be the case with a few power devices by Linear Technology. Their LTSpice is available from their web site; it is a free tool. Various analyses are possible, a few arelisted below: 
Simulation and Analysis 
 Bode plots of key performance parameters  Timing analysis  Mixed signal simulation  Transient analysis  Stability analysis (Phase margin, Gain margin) 
Many other analyses can be arranged for. 
Worst Case 
The Worst Case Analysis is captured in MS Word format and is a document we can produce if requested. The component values and their changes over temperature is calculated in a statistical way and their spread typically a Gaussian distribution is recorded in the document. The main contributor to component value change is temperature which is a result of DC and AC operating points as well as initial value tolerances. The Worst Case Analysis can identify a component in your design that might be overstressed, leading to early circuit failure. 
Part Stress 
Similarly to the Worst Case Analysis, the Part Stress Analysis can be performed upon request and is performed on all the components of your circuit. The purpose of this analysis is to assure that none of the components are operating beyond their intended parameter. The analysis typically includes: 
 Semiconductor break down voltages (Vce, Vbe,Vbias, Voffset, Qgc, etc.)  semiconductor power dissipation  passive device voltage, current and power rating 
Other parameters can be included based on how the actual part is used in the circuit. This document is in a form of Excel spred sheet, listing all the components, the parameter of interest, the component's maximum allowed stress and the actual stress. A PASS/FAIL column identifies if the part is overstressed. Safety margin value if any is also listed 
Phone: (519) 489 7082 Contact: istvan@eProtoCanada.ca 