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Output circuit and method for detecting whether connection port is connected to transmission line

A technology for outputting circuits and connecting ports, which is applied in the direction of logic circuit connection/interface layout, etc.

Active Publication Date: 2016-01-06
ALI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the problem with this method is that point X is not inside the output circuit, so the output circuit still needs to set an additional signal pin to receive the voltage of point X and control the signal processing circuit

Method used

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  • Output circuit and method for detecting whether connection port is connected to transmission line
  • Output circuit and method for detecting whether connection port is connected to transmission line
  • Output circuit and method for detecting whether connection port is connected to transmission line

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Embodiment Construction

[0032] Certain terms are used in the specification and subsequent claims to refer to particular elements. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing.

[0033] In addition, "an embodiment" mentioned below means that the specific features, structures or characteristics described in this embodiment are included in at least one implementation of the present invention. Furthermore, "an embodiment" appearing in different paragraphs in the text does not represent the same embodiment. Therefore, although the following descriptions of different embodiments may refer to different structural features or methodological actions, these different features can be implemented in embodiments conforming to the spirit of the present i...

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Abstract

The invention discloses an output circuit and a method for detecting whether a connecting port is connected to a transmission line or not. The output circuit comprises the connecting port, a voltage output stage and a judging circuit. The connecting port is used for being selectively connected with the transmission line. The voltage output stage is used for providing an output end point for a first signal and fetching a second signal from the output end point, wherein the output end point is connected to the connecting port in a coupled mode. The judging circuit is connected to the voltage output stage in a coupled mode and generates a judging signal according to the first signal and the second signal so as to indicate whether the connecting port is connected to the transmission line or not. According to the output circuit and the method for detecting whether the connecting port is connected to the transmission line or not, when no transmission line is connected, a signal processing device in the output circuit is in the power saving state or turned off, and therefore unnecessary power consumption can be avoided. In addition, due to the fact that a detection mechanism of the output circuit is carried out inside the output circuit, an additional signal connection pin is not required to be arranged in the output circuit to detect the transmission line connecting state, and the hardware cost and the circuit area are saved.

Description

technical field [0001] The invention relates to an output circuit, especially a method for detecting whether a connection port of the output circuit is connected to a transmission line, and the related output circuit. Background technique [0002] Generally speaking, a multimedia playback device is provided with a plurality of connection ports to provide video and audio signals to be output to a playback device (such as a display) to meet different needs of users. But in actual use, some connection ports may not be connected to any playback device. Nevertheless, the signal processing circuit or related output circuit used to process or generate audio-visual signals still consumes considerable power, thereby causing unnecessary waste of energy and power. In order to avoid such unnecessary power consumption, there are many ways to detect whether the transmission line is connected to the connection port in the prior art. Through such detection, the power consumption of the out...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K19/0175
Inventor 许智渊方建翔
Owner ALI CORP
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