Terminating resistance matching circuit of differential interface circuit and terminating resistance matching method

A technology of differential interface and termination resistor, which is applied in the direction of logic circuit interface device, logic circuit connection/interface layout, electrical digital data processing, etc. It can solve the problem that the interface circuit is difficult to establish correct communication, the design is difficult to follow the interface protocol, and increase the analysis data Errors and other problems, to improve eye height parameters, reduce termination resistance mismatch, and increase reliability

Inactive Publication Date: 2018-06-12
CHINA ACAD OF TELECOMM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the resistance value deviation is large, the sampling result deviates too much from 1/2Vreg, which may reduce the eye height in the data eye diagram, directly reduce the quality of the data eye diagram, and increase the possibility of

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  • Terminating resistance matching circuit of differential interface circuit and terminating resistance matching method
  • Terminating resistance matching circuit of differential interface circuit and terminating resistance matching method
  • Terminating resistance matching circuit of differential interface circuit and terminating resistance matching method

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Embodiment Construction

[0045] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments. In the following description, specific details, such as specific configurations and components, are provided only to assist in a comprehensive understanding of the embodiments of the present invention. Accordingly, those of ordinary skill in the art should recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. Also, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

[0046] It should be understood that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic related to the embodiment is included in at least one embodiment of t...

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Abstract

The invention provides a terminating resistance matching circuit of a differential interface circuit and a terminating resistance matching method. In order to improve the data quality of the differential interface circuit in the communication process, a data detection circuit and an adjustable resistance network are additionally arranged in a transmitter chip, and automatic calibration and adjustment are carried out on a terminating resistance value through a control circuit after data detection. Eye height parameters in a data eye diagram can be automatically improved in real time, the data quality is improved, and the reliability of data analysis is improved; at the same time, the problem of terminating mismatch between transmitters completed by different designers can be reduced.

Description

technical field [0001] The invention relates to the technical field of integrated circuit design, in particular to a termination resistance matching circuit of a differential interface circuit and a termination resistance matching method. Background technique [0002] figure 1 Shown is the equivalent block diagram of a common differential interface circuit system, figure 1 The middle circuit board A sends a differential signal to the circuit board B through a cable (Cable), wherein D+ / D- are the sending (Host) and receiving (Device) transmitter chip ports for sending and receiving differential data, respectively. TP1 and TP4 are the transmitter chip pins soldered on the circuit board A / B, TP2 and TP3 are the pins of connector A and connector B respectively. Different interface protocols have clear requirements for the differential data eye diagrams at these pin ports, so as to standardize the design. [0003] figure 2 shown as figure 1 The equivalent circuit diagram of...

Claims

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Application Information

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IPC IPC(8): G06F13/40H03K19/0175
CPCG06F13/4086H03K19/017509
Inventor 冯超
Owner CHINA ACAD OF TELECOMM TECH
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