Operational Description

FCC ID: WJ5-ASX

Operational Description

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FCCID_1268191

6190 Circuit Description BC05 QFN QFN(BC57F687A05) U1 The BlueCore device, U1, selected for this design is a BC05 QFN Low-cost ROM Stereo Headset Solution. RF Front-End Figure 1 shows the proportion of the schematic associated with the RF front-end (1) It consists of: z A balanced antenna filter, U2, a Soshin DBF81F104. The main benefits of this component is its small form factor and low cost when compared to a separate filter/balun solution. z An LC network, L10 and C37. This provides a DC bias for the BlueCore5-Multimedia ROM QFN from the 1.5V rail.

z corresponding DC blocking capacitors C38 and match a network C39,C40. z A printed meander line antenna The ANT1 connected the DBF81F106 UNB PIN through a C38. z U2 is connected directly to the RF pins, 7 and 8 of the BC05 QFN.


Document Created: 2010-03-17 10:10:48
Document Modified: 2010-03-17 10:10:48
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