Single chip tuner integrated circuit for use in a cable modem

Details Single chip tuner integrated circuit for use in a cable modem Single chip tuner integrated circuit for use in a cable modem

2011-07-12

2011-07-12

Nguyen, Brian D (Department: 2472)

Multiplex communications

Communication techniques for information carried in plural...

Combining or distributing information via frequency channels

C375S222000

Reexamination Certificate

active

07978735

ABSTRACT:
A novel single chip tuner integrated circuit (IC) for multiple video reception in a cable modem. The tuner circuit is well suited for use in cable modem systems adapted to implement the DOCSIS 3.0 specification which specifies multiple simultaneous video channel reception. The single-chip tuner integrated circuit comprises a plurality of tuner sub-circuits wherein each tuner sub-circuit is operative to generate a single output channel, determined in accordance with a tune commend input. The tune command input is used to generate a frequency reference signal that is input to a corresponding tuner sub-circuit. The frequency reference signal for a tuner sub-circuit is mixed with an input RF receive signal from the CATV input to the cable modem to generate a baseband channel. The baseband channel is subsequently filtered, amplified and input to the PHY circuit wherein undergoes analog to digital conversion (ADC) before being input to a baseband processor.

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