EDACafe Weekly Review December 4th, 2016

Reducing Analog Cell Layout Time with the Symbolic Editor
December 1, 2016  by Graham Etchells, Director of Product Marketing at Synopsys

Hello again!

In the last blog post I profiled the use of Custom Compiler’s Symbolic Editor for rapid digital cell layout.

In this post, we will tackle analog cell layout and show some more of the Symbolic Editor features that enable analog layout engineers to complete their layout in minutes vs. hours.

As with the digital cell layout, engineers can take advantage of the Symbolic Editor’s ability to define multiple P and N row pairs, as shown in Figure 1.

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Figure 1. Multiple Row Pairs

The preview window shows how the layout will look when realized on the layout canvas. In this example, it is clear that in order to make the design more compact, the larger transistors need to be folded.

Folding the transistors is very easy using the Symbolic Editor. Options on the toolbar allow the designer to fold the transistor by specifying either the number of segments desired or by specifying a width threshold. Once the option is set, all the layout engineer has to do is simply select the appropriate devices and have them folded such that the transistors fit neatly in the rows. Figure 2 shows how the design looks before and after folding.

Continuing a tradition started in the early days of the company, the European edition of the Mentor Graphics’ User Group meeting, now renamed User2User or U2U, was held Tuesday, October 11, in Munich, Germany.u2u

In the opening remarks Matthias Knoppik, Mentor Graphics’ Area Director Northern-Central Europe, expressed his excitement for the record attendance, and briefly presented the agenda for the one-day event. Two keynote presentations and seven technical tracks packed the day, from 9:15 a.m. to 4:30 p.m. An exhibit area setup with podiums mounted by computers gave Mentor’s partners the opportunity to demonstrate their products.

The first keynote was delivered by Malcom Penn, Chairman and CEO of Future Horizon, a market research and analysis enterprise. Titled “Caveat Emptor: The Triumph of Hype vs Reality,” Malcom highlighted the four factors that influence industry growth: the economy, unit growth, capacity or the ability to make those units, and the price exacted from them. In discussing each of them, he peppered the delivery with anecdotal and ironic references with lighthearted spirit. It was an enjoyable presentation.

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