BlueVox2 Headset Columbus OH

This article offers a look at the BlueVox2 Headset, a product which features noise cancellation and dual-microphone channels.

Local Companies

McCormick Taylor Inc
(614) 436-1700
445 Hutchinson Ave
Columbus, OH
Korda Nemeth Engineering
(614) 487-1650
1650 Watermark Dr
Columbus, OH
Advanced Computational Engineering Services
(614) 861-7015
750 Cross Pointe Rd
Columbus, OH
Paul J Ford & Co
(614) 221-6679
250 E Broad St
Columbus, OH
Integral Solutions
(614) 888-4684
8108 N High St
Columbus, OH
Midwest Service & Engineering Inc
(513) 705-2060
605 Clark St
Middletown, OH
Diversified Engineering Inc
(330) 364-1631
304 E High Ave
New Philadelphia, OH
Cates & Associates Inc
(513) 831-0551
200 Techne Center Dr
Milford, OH
Pace
(513) 793-2771
3501 Tiffany Ridge Ln
Cincinnati, OH
Louis Perry & Associates Inc
(330) 334-1585
165 Smokerise Dr
Wadsworth, OH

provided by: EDN

In the world of Bluetooth-headset design, every cent of the BOM (bill of materials) counts. With that fact in mind, CSR has introduced single-chip devices with BOM figures of $5 and $6. The BlueVox2 headset costs $5, and the extra $1 adds DSP for active noise cancellation to remove ambient sounds from the microphone channel. The company?s Kalimba block adds the DSP function, with either single-microphone operation or dual-microphone channels; the second microphone is for ambient noise and adds just a few cents to the cost. The DSP code is in ROM, also lowering costs.

The chip operates to Bluetooth 2.1 EDR (enhanced data rate) and implements the company?s AuriStream codec for improved voice quality and lower power when both ends of the link can use it or autonegotiates to fall back to a standard codec if not. Power management, including battery charging, is on-chip; the Bluetooth core is CSR?s Bluecore5 block, and the control processor is an XAP2+ + RISC core from Cambridge Consultants (www.cambridgeconsultants.com). A reference design is available; it includes not only complete layout and component information, but also a built and working example. Power demand is 11 to 14 mA at 3.7V, depending on the codec in use. Transmitter power is 8 dBm, and receiver sensitivity is 290 dBm. These figures provide greater link robustness and avoid cross-body signal-loss dropouts, according to the company. The non-DSP version has similar RF performance and power requirements of 6.5 to 8.5 mA.

ECSR, www.csr.com.



author: by Graham Prophet

EDN. Copyright © 2008 Reed Business Information, a division of Reed Elsevier Inc. All rights reserved.

Featured Local Company

OakTec, Inc.

Design and manufacture of custom and standard electronic machine controls for original equipment manufactures (OEM).

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755 Congress Park Drive
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Design and manufacture of custom and standard electronic machine controls for original equipment manufactures (OEM) applications. Process control instrumentation, digital panel meters, transducers and transmitters, for measuring volt, amp, power, temperature, frequency and counting applications.

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