ADVANCED DIRECT CONVERSION CABLE TUNER

The BCM3421 is a highly integrated, advanced direct conversion, single-chip silicon Tuner It integrates the global tuning function, including selectivity, and supports 64-QAM, 256-QAM, and 1024-QAM digital cable modem applications. The input signal is first driven to the LNA with wideband AGC and then filtered and fed to the image rejection mixer. The LO signal feeds the second input of the mixer which downconverts the RF signal to a low 4-MHz IF frequency. The IF signal is then filtered (channel selectivity) and shaped to be connected to the channel decoder inputs. There is no need for an external SAW Filter Additionally, the Voltage Controlled Oscillator (VCO) is fully integrated with no external tank component. The BCM3421 is specifically designed for use with Broadcom’s industry-leading single-chip cable modem devices. With a low BOM cost and a proven reference design, the BCM3421 provides a better alternative to traditional CAN Tuners By Broadcom Corp.
BCM3421 's PackagesBCM3421 's pdf datasheet



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BCM3421 Application circuits
BCM3421 circuits
This is one application circuit of BCM3421,If you need more circuits,please download BCM3421's pdf datasheet.


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