Analog video signal output device and electronic device

Abstract

An embodiment of the invention discloses an analog video signal output device and an electronic device. The analog video signal output device can comprise a video signal output circuit, a DC blocking circuit, a bias circuit, a detection circuit and a power-supplying switch circuit used for supplying power to the video signal output circuit; the video signal output circuit is used for outputting analog video signals to an analog video signal output port; the detection circuit is used for detecting whether the port voltage value of the analog video signal output port is larger than a preset voltage threshold value, when the port voltage value of the analog video signal output port is detected to be larger than the preset voltage threshold value, the power-supplying switch circuit is controlled to be in a power-supplying shut-down state; when the port voltage value of the analog video signal output port is smaller than a preset voltage threshold value, the power-supplying switch circuit is controlled to be in a power-supplying state. According to the technical scheme, the analog video signal output device and the electronic device are beneficial to reducing non-load power consumption of the analog video signal output port to some extent, and low-carbon environment-protection rate is improved.

Description

technical field [0001] The invention relates to the technical field of electronic circuits, in particular to an analog video signal output device and electronic equipment. Background technique [0002] With the development of digital TV technology, digital TV set-top boxes are becoming more and more common, and have now developed into an indispensable audio and video equipment for every family to watch TV programs. As a popular electronic product, the power consumption of set-top boxes has become a direct reflection of the competitiveness of this product, and various countries have successively issued related energy efficiency directives for set-top boxes, the purpose of which is to guide set-top box products towards low power consumption. progress towards the goal. Therefore, how to reduce the power consumption of set-top box products has become an important research direction of various set-top box manufacturers. [0003] According to different signal transmission networ...

AI Technical Summary

Problems solved by technology

[0004] At present, the analog video signal output port of the set-top box does not support hot plugging. No matter whether the port is in the no-load state, its related circuits (such as the video signal output circuit) are in working state, so there is considerable power consumption.

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