LVDS (low-voltage differential signaling) open-circuit and short-circuit detection device and detection method
A technology of open-short circuit detection and logic detection, which is applied in the direction of measuring devices, measuring electricity, and measuring electrical variables, etc., can solve problems such as complex software and hardware design, and achieve low cost, high detection accuracy, high detection efficiency, and simple operation.
Active Publication Date: 2015-07-22
WUHAN JINGCE ELECTRONICS GRP CO LTD
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Problems solved by technology
The advantage of this method is that it can realize open and short circuit detection. The disadvantage is that the software and hardware design is complicated, and the software and hardware design of ADC and MCU are required.
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[0013] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.
[0014] Such as figure 1 As shown, the present invention includes an LVDS transmitter 1 , an LVDS receiver 2 , an LVDS interconnector 3 for connecting the LVDS transmitter 1 and the LVDS receiver 2 , a comparator 4 and a logic detection circuit 5 . The P terminal of the LVDS transmitter 1 is connected to the positive input terminal of the comparator 4 , the N terminal of the LVDS transmitter 1 is connected to the negative i...
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The invention relates to the field of an LVDS (low-voltage differential signaling) detection technology, and in particular relates to an LVDS open-circuit and short-circuit detection device and method. The LVDS open-circuit and short circuit detection device comprises an LVDS transmitter, an LVDS receiver and an LVDS interconnector for connecting the LVDS transmitter with the LVDS receiver, as well as a logic detection circuit; the output end of the LVDS transmitter is connected with a comparator, wherein the positive input end of the comparator is connected with the P end of the LVDS transmitter, and the reverse input end of the comparator is connected with the N end of the LVDS transmitter, and the output end of the comparator is connected with the logic detection circuit. The advantages of the traditional LVDS interconnector open-circuit detection are absorbed, the LVDS short-circuit detection is realized by simple peripheral circuit, the complex software and hardware development and design are eliminated, the operation is easy, the cost is low, and the detection validity and detection efficiency are very high; and furthermore, the circuit is not likely to affect the regular transmission of the LVDS signal.
Description
technical field [0001] The invention relates to the technical field of LVDS detection, in particular to an LVDS open-short circuit detection device and a detection method. Background technique [0002] LVDS (Low-Voltage Differential Signaling) is a low-swing differential signal technology. It enables signals to be transmitted at hundreds of Mbps over differential PCB pairs or balanced cables, and its low voltage amplitude and low current drive output achieve low noise and low power consumption. LVDS signal transmission generally consists of three parts: LVDS transmitter, LVDS interconnector, and LVDS receiver. The LVDS transmitter consists of a current source driving a differential line pair, usually 3.5mA; the LVDS interconnect includes PCB traces and termination resistors, usually 100, 120 ohms; the LVDS receiver has a high input impedance, so the current The current of the source basically flows through the terminal resistor, that is, a voltage of ±350mV is generated on...
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IPC IPC(8): G01R31/02
Inventor 彭骞方红陈凯沈亚非
Owner WUHAN JINGCE ELECTRONICS GRP CO LTD