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A mlvds receiving circuit

A technology of receiving circuits and resistors, applied in the field of data transmission, can solve problems such as interference data transmission and errors, and achieve the effect of failure protection and wide common mode input range

Active Publication Date: 2018-01-23
CHENGDU CORPRO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, since many receivers and transmitters are connected together, mutual interference can easily cause data transmission errors

Method used

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  • A mlvds receiving circuit
  • A mlvds receiving circuit
  • A mlvds receiving circuit

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Embodiment Construction

[0016] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0017] Such as figure 1 and figure 2 and image 3 As shown, an MLVDS receiving circuit includes a pre-receiving stage circuit and a comparator circuit. The pre-receiving stage circuit converts a differential signal with a wide input common mode into a constant common mode voltage through the negative feedback of the differential operational amplifier. differential signal.

[0018] The pre-receiving circuit includes a negative feedback operational amplifier, the non-inverting input terminal of the amplifier is connected with the resistor R1, the inverting input terminal of the amplifier is connected with the resistor R2, and the non-inverting input terminal and the inverting input terminal of the resistor R3 are connected to form a negati...

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Abstract

The invention discloses an MLVDS receiving circuit, comprising a pre-receiving level and a comparator, wherein the pre-receiving level converts a differential signal with a very wide input common mode into a differential signal with a constant common mode voltage through the negative feedback of a differential operational amplifier, the pre-receiving level comprises a negative feedback operational amplifier, an in-phase input end of the amplifier is connected with a resistor R1, an inverting input end of the amplifier is connected with a resistor R2, a resistor R3 is connected with the in-phase input end and the inverting input end of the amplifier to form the negative feedback, and a resistor R4 is connected with the inverting input end and the in-phase input end of the amplifier to form the negative feedback. According to the MLVDS receiving circuit provided by the invention, the circuit has a wide common mode input range and can realize failure protection, and the pre-receiving level converts the differential signal with the very wide input common mode into the differential signal with the constant common mode voltage through the negative feedback of the differential operational amplifier.

Description

technical field [0001] The invention relates to the field of data transmission, in particular to an MLVDS receiving circuit. Background technique [0002] In many high-speed applications, not only point-to-point transmission is required, but also multipoint-to-multipoint transmission is required. In the process of multipoint-to-multipoint transmission, it is impossible for all transmitters and receivers to have a common power supply and ground, so the common-mode voltage of the signal will vary greatly, even lower than 0V and higher than the power supply voltage. For proper reception, the receiver must have an extremely wide input common-mode voltage range. In addition, since many receivers and transmitters are connected together, mutual interference can easily cause data transmission errors. Therefore, a receiver with a fail-safe function must be used to receive the differential signal correctly. Contents of the invention [0003] The object of the present invention is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/16
Inventor 李伟伟戴广豪
Owner CHENGDU CORPRO TECH CO LTD
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