Toshiba Develops 60GHz Receiver Technology Using CMOS Device

Jun 15, 2007

Toshiba Corporation today announced new technology that opens the way to manufacturing powerful ICs for the millimeter-waveband.

The new fabrication process uses a low-cost CMOS process to achieve high-speed, highly-integrated wireless communications over short distances, and will support development of consumer applications. Toshiba unveiled the technology on June 15 at the 2007 Symposia on VLSI Circuits, in Kyoto, Japan.

Millimeter-wave communication is a highly anticipated solution that offers high-speed wireless communication in the 60GHz band, a frequency over ten times higher than that of wireless LAN. While communication distances are limited to a few meters due to the nature of the wave, the wide bandwidth of the signal allows data transfers at a rate of more than 1 gigabit a second.

In Japan, the U.S. and Europe, frequencies around the 60GHz band are allocated to unlicensed equipment. In the case of Japan, the allocated range is 59 to 66GHz, a width of 7GHz. As a result, millimeter-wave communication is increasingly seen as a solution for short distance transmission of high-speed data.

The confluence of broadband digital content and wireless home networks is prompting increasing interest in high speed wireless transfers of high definition video between digital equipment in the home. Toshiba's new technology is expected to be applied to such applications, and to support their realization.

60GHz IC for millimeter-wave communication have been fabricated with gallium arsenide (GaAs), which is more expensive than CMOS IC. Millimeter-wave GaAs IC also require separate integration on the module of an antenna and a synthesizer, which can not be fabricated with GaAs process technology, plus additional components, including bonding wire and costly ceramic board. This further increases cost and chip die size.

With advances in process technology, complementary metal-oxide semiconductor (CMOS) technology is now approaching a level where it is applicable to the millimeter waveband. This has prompted universities and companies around the world to promote development of CMOS IC, as CMOS devices enjoy the advantages of a low cost silicon substrate, and are the most widely used devices in consumer and industrial digital ICs. In addition, multiple functions, including a digital signal processor can be formed directly on the chip.

Toshiba has realized a 60GHz CMOS receiver chip for the millimeter-wave band. It integrates an on-chip antenna, LNA, a mixer with a preamplifier and a phase-locked loop (PLL) synthesizer in a die that is only 1.1mm x 2.4mm without pad area. Application of 90nm process technology, the state of the art process for millimeter waveband CMOS, supports high levels of integration and achieves a performance close to that of much more complex and expensive GaAs devices. A fully differential circuitry improves signal quality, as it achieves noise-resistant features suited to millimeter-wave IC application. Optimization of element structure and wiring structure restrain internal noise, and contributes to realizing stable operation—the major issue to overcome for millimeter-wave CMOS IC.

Source: Toshiba

Explore further: Ultra-low power radio transceiver enables truly wireless earbuds

add to favorites email to friend print save as pdf

Related Stories

Living in the genetic comfort zone

2 hours ago

The information encoded in the DNA of an organism is not sufficient to determine the expression pattern of genes. This fact has been known even before the discovery of epigenetics, which refers to external ...

'Bright spot' on Ceres has dimmer companion

3 hours ago

Dwarf planet Ceres continues to puzzle scientists as NASA's Dawn spacecraft gets closer to being captured into orbit around the object. The latest images from Dawn, taken nearly 29,000 miles (46,000 kilometers) ...

Key facts on US 'open Internet' regulation

4 hours ago

A landmark ruling by the US Federal Communications Commission seeks to enshrine the notion of an "open Internet," or "net neutrality." Here are key points:

Spotify deals with random shuffle and we mortals

4 hours ago

How do we mortals perceive random sequences? An entry in the question-and-answer site Quora focused on a question involving a music-streaming service Spotify. That question signifies how we perceive what ...

Recommended for you

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.