Digital television receiving equipment and radio frequency signal processing device thereof

Abstract

The invention provides digital television receiving equipment and a radio frequency signal processing device thereof. The device comprises a printed circuit board, a radio frequency terminal, a singleended-to-differential module and a tuner; an isolation channel is arranged on the printed circuit board to form a first area and a second area which are isolated mutually, the first area is surrounded by the isolation channel, a first public portion is formed in the first area, a second public portion is formed in the second area, and the first public portion and the second public portion are coupled through at least one portion isolation capacitors; the radio frequency terminal is installed in the first area and electrically connected with the first public portion; the input end of the single ended-to-differential module is electrically connected with the output end of the radio frequency terminal, and the single ended-to-differential module is installed in the first area and electrically connected with the first public portion; and the tuner is electrically connected with the output end of the single ended-to-differential module, installed in the second area and electrically connected with the second public portion. Accordingly, the anti-interference capacity and the transmission quality of a radio frequency signal are improved.

Description

technical field [0001] The invention relates to the technical field of digital television, in particular to a radio frequency signal processing device and digital television receiving equipment provided with the radio frequency signal processing device. Background technique [0002] Digital signal receiving equipment such as TVs and set-top boxes receive cable TV signals through antennas. Since the antennas are directly exposed to the external environment, they will be affected by lightning and other effects; Dangerous, the national safety standard requires that the antenna in the TV should be isolated with an isolator to isolate the external antenna from the internal circuit of the TV motherboard. [0003] The current available solution is to use an external isolator and insert the isolator on the main board to isolate the signal and ground. However, the cost of this external isolator is high, and it increases the breakpoint of radio frequency signal transmission, which af...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a radio frequency signal processing device and a digital signal receiving device with the radio frequency signal processing device, so as to solve the problem that radio frequency signals are easily interfered in the prior art

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