| Bluetooth Receiver |
Kaben's Bluetooth ReceiverKaben's Bluetooth receiver is a robust heterodyne architecture, centered on the low phase noise and ultra low spur level, frequency hopping, Delta-Sigma frequency synthesizer, and the “SAW like” performance of the on-chip Sampling IF (SIF) filter. As can be seen in the receiver diagram, the incoming Bluetooth signal is first applied to a Low Noise Amplifier, down-converted to a 3 MHz IF frequency, and applied to the Sampling IF filter.
As shown in the filter response curve, the 3 MHz IF signal is Band-Pass filtered with exceptionally steep filter skirts. Not only does the SIF have steep filter skirts, it also provides constant group delay across the passband, thereby adding no distortion to the Bluetooth signal. Further, the SIF operates in either of two receive modes; a high performance mode having -45 dB adjacent channel side-lobes (Green Trace), and a low power consumption mode with -30 dB side-lobes (Blue Trace).
See Bluetooth |
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