The transconductance of a MOSFET is an important design parameter for CMOS design. This parameter and the threshold voltage form a pair of parameters that almost all CMOS design is based on. Signal Processing Group Inc. released a javascript calculator to calculate this parameter for quick CMOS design that can be trimmed to a final design using some nth order simulator. Hand calculations lay the foundation for design and providing a starting point for the designer. Please visit the SPG website for more options and information.

COX is a critical design parameter for CMOS design. It is the capacitance generated by the gate oxide capacitance and is a parameter that generates the transconductance gain number for the MOSFET. A calculator for this parameter was posted by the team at Signal Processing Group Inc. to facilitate the designer’s task of designing CMOS circuits. It can be found under the “calculators” menu item on the SPG website.

First order RC filters are very useful and ubiquitous filters in the industry. From simple filtering jobs, integration, anti-aliasing filters they are used almost without thinking. There is a low frequency point on the characteristic ( say fl ) and a high frequency point ( say fh ). The low frequency point is the so-called 3 dB point on the first order characteristic and the high frequency point is where the high attenuation occurs. For further details, interested readers are directed to the Signal Processing Group Inc. website. Please look at the “complementary items” menu and follow to the “more free reports and articles ” link. Select the ” First order filter attenuation and frequency parameter calculations algorithms” item. This post deals with the availability of a javascript calculator released for calculating the filter characteristic points. Please select the calculators link from the SPG website and then select the calculator item from the index of calculators.

Complex and absolute numbers are used extensively in RFMW design. A design engineer should be conversant with these quantities and their conversions and manipulations for effective analysis. A recently released “cheat-sheet” for complex and absolute numbers has been released by Signal Processing Group Inc. and is available on the SPG website. Please find the link under “complementary” items. Please visit the SPG website for technical info and other items of interest.