Toshiba Electronic Devices & Storage onthult ontvanger voor 5GHz met lage spanning voor nieuwe draadloze LAN
TOKIO–(BUSINESS WIRE)– Toshiba Electronic Devices & Storage Corporation (TDSC) heeft vandaag aangekondigd een radio-ontvanger van 5GHz met lage spanning te hebben ontwikkeld. De radio-ontvanger is bedoeld voor een nieuwe generatie draadloze LAN, IEEE 802.11ax. Het bedrijf publiceerde 14 september de details van de technologie de Solid-State Circuits Conference in België.
Toshiba Electronic Devices & Storage to Unveil Low Voltage 5GHz Receiver for Next-Generation Wireless LAN |
|||||||||||||||||
|
TOKYO–(BUSINESS WIRE)– Toshiba Electronic Devices & Storage Corporation (TDSC) today announced development of a low voltage 5GHz receiver for the next-generation IEEE802.11ax1 wireless LAN. The company reported details of the technology on September 14th at the European Solid-State Circuits Conference in Belgium. This Smart News Release features multimedia. View the full release here: http://www.businesswire.com/news/home/20170915005376/en/
Continued growth in the Internet of Things requires high-speed communications in environments increasingly crowded with numerous wireless LAN devices. IEEE 802.11ax, the next-generation wireless LAN, will be four times faster than its predecessor, even in crowded environments. However, high speed digital signal processing with low power dissipation requires adoption of a faster CMOS devices, operating with supply voltages lower than 1.0V. Unlike digital circuits, the performance of CMOS analog circuits, such as RF2 CMOS receivers, degrades drastically as voltage falls. New circuit technology that can operate below 1.0V is required to overcome this problem. TDSC has developed three new technologies for low voltage RF receivers. The second is a low noise frequency converter. A frequency converter switches a received RF signal into a low frequency signal to input into the analog to digital converter. Conventional frequency converters use a DC current source to improve the performance of conversion switches in low voltage designs, but this additional current source degrades performance with low frequency noise. Toshiba’s new frequency converter suppresses low frequency noise by moving the DC current source to the RF side of the conversion switches. Low frequency noise is up-converted to the RF frequency, which is separated from the desired low frequency signal. The result is sufficient switch performance without noise degradation. The third is a current adder OPAMP. The OPAMP amplifies the converted low frequency signal to level a sufficient high to input the analog signal into the digital converter. Since the maximum output signal level is limited by the supply voltage, OPAMP is forced to reduce its operating voltage range. The new OPAMP suppresses the DC current source from the output stage with a high speed differential current mirror3, and provides larger output voltage even in a low voltage environment. . Integrating these three technologies into a 5GHz wireless LAN receiver has allowed TDSC to secure the level of performance essential for next-generation wireless LAN. TDSC will continue to develop the transceiver, and to contribute to the progress of high speed wireless communication.
About Toshiba Electronic Devices & Storage Corporation Our 19,000 employees around the world share a determination to maximize the value of our products, and emphasize close collaboration with customers to promote co-creation of value and new markets. We look forward to building on annual sales now surpassing 700-billion yen (US$6 billion) and to contributing to a better future for people everywhere. View source version on businesswire.com: http://www.businesswire.com/news/home/20170915005376/en/ Contacts Press Contact: |
|||||||||||||||||
Fig. 1 : Variable linearity RFAMP (Graphic: Business Wire)