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Novel radio frequency receiving tuner system

A radio frequency receiving and tuner technology, applied in the field of digital signal transmission, can solve the problems of increasing system design cost and complexity, and achieve the effect of low power consumption and low cost

Active Publication Date: 2015-05-27
SHANGHAI HIGH DEFINITION DIGITAL TECH IND
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Problems solved by technology

[0009] Of course, the existing Silicon Tuner technology itself has been developing continuously in recent years. The more common Silicon Tuner on the market uses two frequency conversion technology, which reduces the design difficulty of the chip itself, but requires an external SAW Filter (Saw Filter) ), increasing system design cost and complexity

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Embodiment Construction

[0044] The present invention is applied in digital signal transmission, particularly relates to a kind of high-performance multi-band multi-mode Silicon Tuner chip system conforming to the ABS-S / DVB-S / DVB-S2 satellite digital TV standard in the satellite digital TV broadcasting transmission system, is The major improvement made on the basis of the existing Silicon Tuner chip system has very important practical significance.

[0045] As we all know, the traditional RF receiver system generally adopts a superheterodyne structure, but because the superheterodyne structure requires large power consumption and poor integration, an external off-chip filter must be connected. The receiver system adopting the zero-IF structure adopts the direct frequency conversion technology, and does not need image frequency suppression, and the frequency of the IF signal is low, which has the characteristics of low power consumption and high integration.

[0046] The novel radio frequency receiving...

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Abstract

The invention provides a novel radio frequency receiving tuner system. The system comprising the following modules: a signal link module which is in charge of amplification, frequency conversion and filtering of a radio frequency input signal, and a frequency synthesizer module which is in charge of generating a local oscillation signal needed for frequency conversion. Moreover, a digital control unit is arranged in the system so as to realize communication with a digital baseband module or a microcontroller. The novel radio frequency receiving tuner system has the following positive effects: supporting a complete single chip integrated satellite digital television tuner, needing no assistive devices, such as an external LNA (Low Noise Amplifier), a SawFilter and a crystal oscillation circuit; supporting multi-band receiving, such as 950MHz-1450MHz (ABS-S band), 950MHz-1750MHz (ABS-S expansion band) and 950MHz-2150MHz (DVB-S band); using simple 3.3V single supply in a power management system; being integrated with an I2C bus controller, and providing a software control interface; being integrated with automatic calibration circuits for frequency, gain, bandwidth and the like, and being free from manual testing and manual debugging.

Description

technical field [0001] The invention relates to digital signal transmission, in particular to a high-performance multi-band multi-mode radio frequency receiving tuner of the satellite digital TV standard. Background technique [0002] With the rapid development of digital information, digital TV is an end-to-end system that processes signals digitally from program acquisition, program production and program transmission to the user end. Compared with analog TV, digital TV has the characteristics of high image quality, large program capacity (more than 10 times the program capacity of analog TV transmission channel), and good sound effects; and satellite digital TV is an important part of my country's comprehensive digital broadcasting and TV strategy. one of the links. It is reported that among the nearly 400 million TV users in my country, the number of users who will watch TV programs through satellite TV receivers in the future will account for nearly 20% of the total. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03J5/24H04N5/50
Inventor 王韶军周健军金晶梁伟强黄戈卓秉忠
Owner SHANGHAI HIGH DEFINITION DIGITAL TECH IND
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