There have always been good reasons to port designs to new foundries or processes. These reasons have included reusing IP in new projects, moving an entire design to a smaller node to improve PPA, or second sourcing manufacturing. While there can be many potential business motivations for any of the above, in today’s environment… Read More
There is an old saying popularized by Mark Twain that goes “There are three kinds of lies: lies, damned lies, and statistics.” It turns out that no one can say who originated this saying, yet despite however you might feel about statistics, they play an important role in verifying analog designs. The truth is that there are large numbers… Read More
The commonly advanced reason for IP reuse is lower cost and shorter development time. However, IP reuse presents its own challenges, especially for analog designs. In the case of digital designs, once a new standard cell library is available, it is usually not too hard to resynthesize RTL to create new working silicon. For analog… Read More
Every year at DAC, in addition to the hubbub of the exhibit floor and the relatively short technical sessions, there are a number of tutorials that dive in depth into interesting topics. At the 56th DAC in Las Vegas this year, MunEDA offered an interesting tutorial on Analog IP migration and optimization. This is a key issue for large… Read More
The letters “PVT” roll of the tongue easily enough, belying the complexity that variations in process, temperature and voltage can cause for analog designs. For semiconductor processes, there are dozens of parameters that can affect the viability of a design. It would be easy enough to optimize a circuit with only one or two varying… Read More
At the beginning of every project the one of the first questions that ought to be asked is whether there blocks from previous designs that can be reused. On the surface this seems pretty obvious. The wrinkle in this is that reusability varies a lot based on the design type and the effort that a team is willing to expend to bring a design… Read More
When working on an analog design, after initial design specs have been met, it is useful to determine if the design meets specs out to 3 or 4 sigma based on process variation. This can serve as a useful step before going any further. It might not be a coincidence that foundries base their Cpk on 3-sigma. To refresh, Cpk is the ratio of the… Read More
Schematics are still the lynchpin of analog design. In the time that HDL’s have revolutionized digital design, schematics have remained drawn and used much as they have been for decades. While the abstraction of HDL based designs has made process and foundry porting relatively straightforward, porting schematic based designs… Read More
Configurable analog IP has traditionally been a tough nut to crack. Digital IP, of course, now provides for wide configurability for varying applications. In the same way that analog design has remained less deterministic as compared to digital design, analog IP has also tended to be less flexible. However, the tide may be turning… Read More
Optimizing analog designs has always been a difficult and tricky process. Designing for IoT applications has only made this more difficult with the added importance of minimizing power. Unlike other circuit parameters, it is not easy to specify power as a design goal when using equations. Power is a resultant property and must… Read More
