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Split-type LNB interface circuit

An interface circuit and high-frequency head technology, which is applied in the field of separate high-frequency head interface circuits, can solve problems such as unfavorable product promotion, and achieve the effects of easy promotion, cost saving, and simple and convenient use.

Inactive Publication Date: 2016-07-27
XIAMEN PRIMA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the different popularization of set-top boxes of different systems, some users need to buy TVs with DVB-S / S2 receiving function, while some users have already purchased DVB-S / S2 set-top boxes and do not need DVB-S / S2 receiving functions. The DVB-S / S2 receiving function integrated in the TV has become an unnecessary cost borne by the user, which is not conducive to the promotion of the product

Method used

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  • Split-type LNB interface circuit
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Embodiment

[0018] see Figure 1 to Figure 2 As shown, the separate tuner interface circuit of the present invention includes:

[0019] A power supply device 1, used to provide power signals to the TV main board and the TV tuner;

[0020] A USB3.0 interface circuit 6, used to connect between the TV tuner and the TV main board;

[0021] A detection circuit 5, the input of the detection circuit 5 is connected with the TV tuner through the USB3.0 interface circuit 6, and the output of the detection circuit 5 is connected with the input port of the CPU circuit 4; the USB3.0 interface is used as the connection interface , can adapt to the connection requirements of various types of tuners;

[0022] A CPU circuit 4, the ADC input port of the CPU circuit 4 is connected to the detection circuit 5, and the GPIO output port of the CPU circuit 4 is connected to the control end of the switch circuit 2; Judging the type of tuner inserted, and outputting a control signal to the switch circuit 2 to c...

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Abstract

The invention discloses a split-type LNB (low noise block) interface circuit. The split-type LNB interface circuit comprises a power supply device, an USB3.0 interface, a detection circuit, a CPU circuit, a switch circuit and an LNB power supply control circuit. The USB3.0 interface is connected between a television LNB and a television mainboard; the ADC input port of the CPU circuit is connected to the detection circuit, and the GPIO output port of the CPU circuit is connected to the control terminal of the switch circuit; the CPU circuit determines the type of the inserted LNB according to signals provided by the detection circuit, and outputs control signals to the switch circuit in order to control the operation of the control circuit. The split-type LNB interface circuit is of a simple structure, is convenient to use, saves machine purchasing cost for a user, and facilitates the popularization of products.

Description

technical field [0001] The invention relates to a separate tuner interface circuit, in particular to a separate tuner interface circuit which can select a tuner according to user requirements. Background technique [0002] With the popularization of digital TV and the gradual elimination of analog TV signals, more and more TVs have integrated reception functions of DVB-T and DVB-S / S2. Due to the different popularization of set-top boxes of different systems, some users need to buy TVs with DVB-S / S2 receiving function, while some users have already purchased DVB-S / S2 set-top boxes and do not need DVB-S / S2 receiving functions. The DVB-S / S2 receiving function integrated in the TV has become an unnecessary cost borne by the user, which is not conducive to the promotion of the product. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art, provide a separate tuner interface circuit, realize the selective instal...

Claims

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Application Information

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IPC IPC(8): H04N5/50H04N5/63
Inventor 林志浩陈景煌叶艺宾
Owner XIAMEN PRIMA TECH
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