Microwave Engineering Europe - October 2007 - (Page 62)

62 PRODUCTS Sixth generation Bluetooth brings fixed-line-quality voice delivers significantly reduced power consumption and longer battery life CSR’s sixth generation of BlueCore silicon for Bluetooth, designated BlueCore6, provides superior radio performance and low power consumption, as well as full support for the latest version (v2.1+EDR) of the Bluetooth speciﬁcation. Included is CSR’s AuriStream technology, a major improvement to the way Bluetooth handles voice trafﬁc. AuriStream provides toll quality voice calls and is capable of a 40 percent reduction in power consumption in BlueCore6-ROM compared with standard Bluetooth voice transmission methods. CSR has enhanced the RF performance to give BlueCore6 Class 1 Bluetooth range without the need for an external power ampliﬁer. A total 11 dB link margin improvement over BlueCore4 (+4 dBm to Tx, -7 dBm to Rx) makes BlueCore6 a very efﬁcient Bluetooth radio and helps improve operation across the body. BlueCore6ROM is packaged in CSR’s wafer level CSP format and is smaller than competing Bluetooth silicon. Voice remains the key application for Bluetooth, and users continually demand higher quality – but also longer battery life. BlueCore6 offers substantial improvements in both voice quality and power requirements. Bluetooth traditionally relies on a continuous variable slope delta (CVSD) modulation coding scheme to carry voice over a synchronous connection oriented (SCO) link. SCO does not allow for retransmission of failed packets. Since v1.2 of the Bluetooth speciﬁcation, eSCO has supported retransmissions. With AuriStream, CSR has introduced adaptive differential pulse code modulation (ADPCM) as an enhanced voice coding method, since it performs the same function at half the rate of CVSD (ADPCM scans at 32 kbits/s, CVSD 64 kbits/s) saving up to half the Bluetooth power on the handset. ADPCM is more accurate, and provides a higher voice quality. www.csr.com MICROWAVE ENGINEERING EUROPE Free subscription to our bi-monthly newsletter at: www.mwee.com/newsletter 2.4 GHz transceivers enable compact, secure, high-performance USB dongles Nordic Semiconductor has released the nRF24LU1, a single chip 2.4 GHz transceiver, which enables the implementation of compact, high performance USB dongles for wireless peripherals by providing a single chip solution in a 5 x 5 mm QFN package with full on-chip security. It is designed to integrate seamlessly (via the company’s enhanced ShockBurst hardware link layer) with low power 2.4 GHz peripherals that need to run on small batteries for long periods of time, and that are based on the company's nRF24L01 transceiver. The nRF24LU1 can be powered directly from the USB bus using an internal voltage regulator and it also generates all necessary clocks from a single 16 MHz external crystal. The transceiver’s internal 16 kbytes of ﬂash can also be used to emulate non-volatile memory, removing the need for an external EEPROM, thus reducing PCB area and cost. The circuit delivers a full-speed USB 12 Mbits/s PC to USB transfer rate, a powerful and highly optimized embedded 8051 MCU, plus a 2 Mbits/s air data rate. Two key security aspects concern developers:- the application security of communications between the peripheral and the dongle itself, and second, the security of the IP contained within the ﬁrmware of the actual end product. The nRF24LU1 address both issues. It not only features an on-chip hardware AES encryption co-processor providing industry standard data encryption and decryption at the application level, it also employs 16 kbytes of on-chip ﬂash memory that features fully conﬁgurable write and readback protection. www.nordicsemi.com Microwave Engineering Europe ● October 2007 ● www.mwee.com 062-MWEE.indd 62 21/09/07 16:08:40 http://www.polyfet.com http://www.polyfet.com http://www.csr.com http://www.mwee.com/newsletter http://www.filter-solutions.com http://www.filter-solutions.com http://www.nordicsemi.com http://www.mwee.com

Table of Contents Feed for the Digital Edition of Microwave Engineering Europe - October 2007

Microwave Engineering Europe - October 2007 Contents Comment News CMOS RF: Si-On-Sapphire Goes Mainstream Cover Feature: New Data Protection Concept for UHF RFID Tags CMOS RF: RF Design Team Touts CMOS Spin for 3G PAs Wireless HID – Are You Following the Standard to Another “Average” Product Development? Phase Optimisation of the RF Front-End Direct Synthesis of UWB-WiMedia Signal Generation 4G Chips to Target 700 MHz Applications Femtocells Mobilize to Fight Wi-Fi in the Home Products Product Feature: AXIEM Pioneers the Future of EM Technology Calendar

Microwave Engineering Europe - October 2007

For optimal viewing of this digital publication, please enable JavaScript and then refresh the page. If you would like to try to load the digital publication without using Flash Player detection, please click here.