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The intent of the design/test setup will be to validate the use of a measurement-based behavioral model for use in digital modulation simulations and accurate component representation. The amplifier/filter chain is characterized by its nonlinear response using am-to-am and am-to-pm measurements as a function of CW signal drive level and frequency. These frequency-dependent measurements are made in LabVIEW and are used directly by a nonlinear behavioral model embedded in an Ansoft Designer system schematic. A mixer is added to the Ansoft block diagram to represent upconversion to the final carrier frequency.

460-190_Datasheet PDF

The intent of the design/test setup will be to validate the use of a measurement-based behavioral model for use in digital modulation simulations and accurate component representation. The amplifier/filter chain is characterized by its nonlinear response using am-to-am and am-to-pm measurements as a function of CW signal drive level and frequency. These frequency-dependent measurements are made in LabVIEW and are used directly by a nonlinear behavioral model embedded in an Ansoft Designer system schematic. A mixer is added to the Ansoft block diagram to represent upconversion to the final carrier frequency.

To build the prototype cell phone around the OFDM decoder, NEC developed a compact antenna for digital TV broadcasts and a UHF tuner. The TV reception block was tucked into the portion of the phone that houses a digital camera in today's 3G models. While the prototype is designed for digital TV reception in Japan, NEC hopes to offer TV cellular phones in other markets as well.

The TV signal for NEC's demonstration was sent out in an MPEG-2 transport stream. The prototype demultiplexes the stream into MPEG-2 AAC audio and MPEG-4 video, supporting a video transfer rate of 160 kbits/second and a monaural audio rate of 48 kbits/s.

460-190_Datasheet PDF

The video compression format for single-segment OFDM modulation TV broadcasts in Japan hasn't yet been nailed down. The prototype relied on the MPEG-4 decoding function of the base 3G phone and a relatively small, 120 x 160-dot display.

The one-segment broadcasting system is still under discussion and regular broadcasting is still a few years from launch in Japan. NEC engineers said they intend to improve and enhance the performance and power consumption of the cell phone system. In its present form, the prototype can receive TV programming continuously for over one hour using a 600-milliampere-hour lithium battery pack.

We want to realize low power consumption so that a battery can power at least one hour of TV reception plus one-hour call duration,” said Akira Kato, general manager of NEC's Network Development Division.

460-190_Datasheet PDF

NEC plans to demonstrate the TV cell phone at Telecom World 2003, the International Telecommunication Union event to be held Oct. 12-18 in Geneva, Switzerland.

Toshiba CMOS Image Sensor Technology Realizes CCD Image Quality, Captures Brighter, Clearer Images Even in Poorly Lit Locations

460-190_Datasheet PDF

Toshiba America Electronic Components, Inc. (TAEC) announced a new member of its family of complementary metal oxide semiconductor (CMOS) image sensors. Designated TCM8210MD, the new camera module features 330,000-pixel (640H x 480V) video graphics array (VGA) resolution and 30 frames per second (fps) operation. It integrates color imaging and camera signal processing in a compact 10W x 10D x 5.8H-millimeter (mm) module. With performance comparable to charge-coupled devices (CCDs), the device is targeted at high-volume portable digital consumer applications such as mobile phones and PDAs where small size, low-power consumption and high-quality imaging are key design criteria. Sample and volume production quantities are currently available.As a leading manufacturer of highly integrated CMOS image sensors, Toshiba is well positioned to support the expanding market for digital consumer products with embedded image capture capabilities,” said Farhad Mafie, vice president of the ASSP Business Unit at TAEC. We expect the Toshiba CMOS image sensor technology will enable a new generation of portable products that allow users the freedom to take high-quality pictures and wirelessly transmit them to friends and family.” The TCM8210MD CMOS image sensor camera module is well suited for use in camera-enabled compact cell phones where space is at a premium and performance cannot be compromised,” said Andrew Burt, director of wireless market development at TAEC. The Toshiba technology provides best-in-class picture quality with low-power consumption even in low light conditions. Combining a lens, a CMOS image sensor and a digital signal processor, the highly integrated module is a perfect fit for the mobile image requirements in a cell phone or wireless PDA.” He noted that the TCM8210MD has been designed into a camera-enabled mobile phone offered by a major U.S. cellular phone carrier.

Key features of the TCM8210MD are as follows:– Features effective pixel resolution of 330,000 pixels (VGA 640H x 480V-pixel resolution) and 30fps operation.– Features 3.564H x 2.657V-mm image size.– Uses ¼-inch optical format– Integrates color imaging, camera signal processing and a lens unit for best-in-class picture quality even in poorly lit conditions.– CMOS process enables low-cost, small form factor and low-power consumption.– Uses a single 2.8V power supply.– Integrates a phase-locked loop (PLL) circuit and timing controller.– Allows multiple picture size and exposure modes.– Digital outputs of either YUV = 4:2:2 or RGB = 5:6:5 (8-bit parallel).– Host can control the TCM8210MD easily via the Inter-IC (I2C) bus.– Housed in a compact 10W x 10D x 5.8H-mm module designed for easy socket assembly.

Propelled by its Prism line of WLAN chip sets, Intersil is the leader in the 802.11b chip market. But the company also competes against Atheros, Intel, Texas Instruments, and approximately 50 others in the WLAN chip market, according to analysts.

Given that the WLAN chip market is turning into a commodity, some analysts believe that GlobspanVirata was able to acquire Intersil's WLAN unit at a bargain.

GlobespanVirata of Red Bank, N.J. only paid 1.5 times Intersil's total WLAN chip sales. We are surprised by the cheap valuation assigned to the business at 1.5x CY03 sales,” according to a report from WR Hambrecht + Co. LLC of San Francisco.

In comparison, communications-chip maker RF Micro Devices Inc. last year purchased Resonext Communications Inc., a developer of wireless LAN devices, for $133 million in stock. RF Micro paid 5-to-8 times the sales of Resonext, the report said.

Either RF Micro paid too much or GlobespanVirata made the deal of the century. But still, there are ominous signs for all WLAN chip makers. After years of sizzling growth and high margins, the WLAN business is slowly losing its luster.

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