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Method and apparatus for isolating noise from a tuner in a television signal receiver

A technology of TV signal and TV signal processing, applied in parts of color TV, parts of TV system, TV, etc.

Inactive Publication Date: 2006-03-22
INTERDIGITAL CE PATENT HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However there may be situations where it is desired to transfer data from the tuner module to the microprocessor

Method used

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  • Method and apparatus for isolating noise from a tuner in a television signal receiver
  • Method and apparatus for isolating noise from a tuner in a television signal receiver
  • Method and apparatus for isolating noise from a tuner in a television signal receiver

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Embodiment Construction

[0016] The examples herein illustrate preferred embodiments of the invention and are not intended to limit the scope of the invention in any way by the construction of these examples.

[0017] Referring now to the accompanying drawings, and more specifically to figure 1 , shows relevant portions of a television signal receiver 100 suitable for implementing the invention. exist figure 1 1, the portion of television signal receiver 100 shown includes microprocessor 101, input / output ("I / O") port 102, input unit 103, serial clock line ("SCL") 104, serial data line (“SDA”) 105 , a plurality of integrated circuits (“ICs”) 106 through 108 , a bidirectional buffer 109 and a tuner module 110 .

[0018] Microprocessor 101 is electrically connected to I / O port 102 and exchanges signals therewith. The I / O port 102 receives input from an input unit 103, which may be implemented as a hand-held remote control unit, for example. Microprocessor 101 also includes SCL104 and SDA105.

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PUM

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Abstract

An apparatus (100) for isolating a noise intolerant device (110) from a source of noise includes a digital bus (104 / 105). A processor (101) outputs clock signals and first data signals and receives second data signals over the digital bus (104 / 105). A bi-directional buffer (109) is coupled between the digital bus (104 / 105) and the noise intolerant device (110) disposed in a tuner module. The apparatus (100) operates such that, in dependence upon a control signal, the bi-directional buffer (109) selectively passes the clock signals and the first data signals from the digital bus (104 / 105) to the noise intolerant device (110), and the second data signals from the noise intolerant device (110) to the digital bus (104 / 105).

Description

technical field [0001] The present invention relates generally to television signal receivers, and more particularly to a method for reducing noise interference in a phase-locked loop ("PLL") circuit of a television signal receiver tuner module, while allowing the tuner module and controller Two-way communication between units. Background technique [0002] Television systems, such as high-definition television ("HDTV") systems typically employ a front-end that includes a tuner, digital intermediate frequency ("IF") circuitry, and digital demodulation integrated circuit ("IC"). The system can be controlled from a microprocessor using an Inter-Integrated Circuit ("IIC" - typically referred to as "I²C") bus. [0003] The IIC bus is a two-wire, bidirectional digital bus that allows two ICs to communicate simultaneously over the bus path. An IC operating in a "master" mode initiates data transfer operations on the bus and generates clock signals that allow data transfers. An ...

Claims

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Application Information

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IPC IPC(8): H04N5/44H04B1/10H04N5/21H04N5/50
CPCH04N5/44H04N5/50H04N5/21
Inventor D·G·怀特
Owner INTERDIGITAL CE PATENT HLDG