Technology

Multitasking Chips Point to Future Cell Phones


Venture firms see new potential in semiconductor startups that are innovating wireless chips that can work on multiple types of networks

Many venture firms shy away from investing in semiconductor startups because of the inordinately high cost and risk involved relative to other sectors, but some firms are still determinedly pursuing silicon by backing wireless chips containing radios that can work on multiple types of networks. The trend is being fueled by a robust market for wireless devices, as well as the increasing number of wireless networks available for specific purposes.

The iPhone is a good example of a wireless device that utilizes several special-purpose chips, with more than 19 in total and at least five radios, which send and receive the wireless signals that allow a phone to communicate with a variety of networks, from Wi-Fi for data to GPS for location information. Even connecting to the cellular network requires more than one radio, be it to handle older 2G networks or the latest 3G or 3.5G options. For companies designing handsets to run across several networks, the sheer number of them and their frequency bands means adding more chips can get complicated—and expensive.

So if a company can use software to combine multiple radios that talk to a variety of wireless networks on a chip, a handset maker could, in turn, put one chip in a phone and rather than have the phone optimized for certain networks, ship it anywhere in the world, optimizing simplicity and minimizing cost. After all, consumers buying wireless Internet devices (such as, say, the Kindle) aren't interested in which network it runs on, only that their device works.

That's one of the reasons BitWave Semiconductor, which received $10 million in second-round funding this month from Apex Venture Partners, TVM Capital, and ECentury Capital Partners, was so attractive. The company expects to ship a programmable multimode transceiver (which is one small part of the overall radio) this month. Another programmable multimode transceiver startup, Sirific, was purchased this spring by venture-backed Icera, which is building a software-based baseband chip for mobile devices.

Multimode Chips

Others are not building programmable chips, but are focused on multimode chips that use additional hardware to work on different networks. Wavesat, which has raised an undisclosed amount from Skypoint Capital, BDC Venture Capital, Innovatech Montreal, Monet Capital, and Sunsino Ventures Group, is making a WiMAX and Long Term Evolution (LTE) chip that could fit into a wide variety of devices. Other startups raising capital include Altair Semiconductor, which raised $18 million last December from Bessemer Venture Partners, BRM Capital, Giza Venture Capital, and Jerusalem Venture Partners for a total of $26 million. Altair offers a low-power WiMAX chip, but plans to add LTE capabilities for a dual-mode chip within the next year or two.

"I believe there's a long-term secular trend toward handsets doing more—not just calling, but music, video, and data with more and more functionality thrown on them," says Wayne Boulais, a general partner with Apex Ventures and an investor in BitWave. At the same time, these are pricey components for a handset maker to buy, so integrated radios make it cheaper. For BitWave and other firms building such multitasking chips, using a programmable approach makes the high cost of putting money in silicon slightly less risky for the investor.

"It can take a long time to create a design that works. And in an investment area where the costs are at the front end to make them, being able to design into multiple different applications mitigates the risk that the market may end up moving on you once you get the hardware out," Boulais says.

For Cheaper Phones with More Features

Major vendors are doing this as well, with Broadcom and NXP putting as many radios on a chip as possible and other vendors trying to at least create a smaller package of multiple chips. It's also one of the motivations behind the proposed joint venture between STMicroelectronics and Ericsson's mobile-platform group announced this month.

Not all multimode software radios will land in devices. Vanu, a Boston-based company, is building a software-defined radio that could reside in a base station on a cell tower, making it possible for one base station to serve several types of cellular networks. Vanu raised $32 million this week from Norwest Venture Partners, Tata Capital, and Charles River Ventures. The round follows a $9 million first round last summer.

As consumers, we may not care how many chips our cell phones pack unless we lose our ability to access the Web or GPS our location, but these trends playing out in silicon should eventually get us to cheaper phones with more features. Multitasking can be a good thing.

Provided by GigaOm

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