While a lot of manufacturers have “design” tools to help you choose their parts, there are also other useful tools out there. Some, like Appcad, were just tools without trying too hard to sell you anything. Appcad is still available www.hp.woodshot.com and the current version 4.0.0 is really version 3.0.2 with the branding changed. I […]
Choosing a transistor can be a daunting task, not because it is necessarily complicated (but it can be!) but because there are so many to choose from. Digi-Key lists over 40,000 MOSFETs for example. Even before you start your search you need to decide on which type of transistor. For a simple, microcontroller driven switch […]
While we are all probably familiar with the concept of capacitors storing charge, remember that semiconductors do so as well. This may not be an issue for your design or it could be a major headache, depending on the application. With bipolar transistors, charge storage in the base when the transistor is saturated will slow […]
Choosing an opamp for a particular task can sometimes be simple but at other times, you will have a lot of conflicting requirements which makes choosing more of a challenge. Also, the number of opamps available now is huge so it can take a while to work your way through the options from different manufacturers. […]
Education for electronics design tends to have a fair amount of math in it but how much is really required nowadays in order to design electronics? You certainly…
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If you are from a software background coming into digital design using CPLD/FPGAs (complex programmable logic devices/field programmable gate arrays) then you need to adopt a different way of thinking for designing logic. While Verilog and VHDL look like a conventional programming language, the way it is interpreted is different. With software for a microprocessor […]
By Chris Francis Xilinx CoolRunner-II Most of my design is for battery operated equipment, requiring low power devices. While I have used a lot of CPLDs and FPGAs over the years, most devices available are not usually “low power” so you have a limited choice. Philips (now NXP) did the CoolRunner CPLDs which were sold […]