Invention Grant
- Patent Title: Multi-input multi-output tuner front ends
- Patent Title (中): 多输入多输出调谐器前端
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Application No.: US10882293Application Date: 2004-07-02
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Publication No.: US07701515B2Publication Date: 2010-04-20
- Inventor: Ramon A. Gomez , Charles Brooks , Leonard Dauphinee
- Applicant: Ramon A. Gomez , Charles Brooks , Leonard Dauphinee
- Applicant Address: US CA Irvine
- Assignee: Broadcom Corporation
- Current Assignee: Broadcom Corporation
- Current Assignee Address: US CA Irvine
- Agency: Sterne, Kessler, Goldstein & Fox P.L.L.C.
- Main IPC: H04N5/44
- IPC: H04N5/44

Abstract:
A front end circuit for a television receiver includes a demultiplexer for inputting a multi-band signal from a signal source and separating the multi-band signal into corresponding bands. A plurality of amplifiers adjust gain on signals corresponding to the bands. A multiplexer combines outputs of the amplifiers into a gain-adjusted signal. A plurality of switches direct selected bands to corresponding tuners. The amplifiers are low noise amplifiers. The amplifiers adjust gain between the bands so as to have similar signal strength in the bands. A cable TV input may also be used, wherein the switches also direct signals from the cable TV to the corresponding tuners. Each amplifier can output two (or more) identical signals for its corresponding band, the multiplexer can be a dual multiplexer, and an output of the multiplexer includes only bands selected for direction to the tuners. The signal source comprises any of a broadcast channel received from an antenna, a cable TV channel received from a cable line, and a combination of the two.
Public/Granted literature
- US20050195335A1 Multi-input multi-output tuner front ends Public/Granted day:2005-09-08
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