BlueVox2 Headset Raleigh NC

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

Local Companies

HunterBane Engineering, PLLC
919-803-4274
PO Box 10314
Raleigh, NC
HunterBane Engineering, PLLC
919-803-4274
PO Box 10314
Raleigh, NC
EDA pa
919-781-1083
3739 Naional Dr
Raleigh, NC
Alpha & Omega Group
(919) 981-0310
4911 Green Road
Raleigh, NC
D. Miller & Associates, PA
919-422-8932
1000 Bearcat Way Site 103
Morrisville, NC
Carter and Burgess
(919) 786-4100
5811 Glenwood Ave Ste 300
Raleigh, NC
Richardson G N & Associates Inc
(919) 828-0577
14 N Boylan Ave
Raleigh, NC
Lasater-Hopkins-Chang P C
(919) 832-5587
1015 Wade Ave
Raleigh, NC
Richardson G N & Associates Inc
(919) 836-7697
14 N Boylan Ave
Raleigh, NC
Gary Greene Engineers
(919) 855-8488
5832 Faringdon Pl
Raleigh, NC

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

HunterBane Engineering, PLLC

919-803-4274
PO Box 10314
Raleigh, NC
www.hunterbane.com