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BMC transmitter

A technology of transmitters and flip-flops, used in instruments, CAD circuit design, transmission systems, etc., can solve the problems of large chip area and power consumption, consumption, large power switching noise, etc.

Active Publication Date: 2018-10-26
LONTIUM SEMICON CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to propose a BMC transmitter, to solve the traditional BMC transmitter in the prior art and the existing BMC receiver module are different in circuit properties, resulting in the mutual influence of digital modules and analog modules on the power supply system , At the same time, because the traditional BMC transmitter's equally spaced data or clock drive is a digital buffer, it will not only bring a large power switching noise, but also consume a large chip area and power consumption

Method used

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Embodiment Construction

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0029] Explanation of terms:

[0030] USB Type-C: Developed by the USB IF organization, it has positive and negative insertion and high-power power supply capabilities, and the latest USB interface that can transmit multiple video protocols such as DP, HDMI and MHL;

[0031] USB-PD: A USB power transmission and communication protocol developed by the USB IF organization, which allows USB devices to transmit power up to 100W (20V / 5A), and can change the power s...

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Abstract

The invention discloses a BMC transmitter. Based on a current type digital-to-analog converter, under the control of a time delay control unit, data sent by a data coding and protocol processing unitis subjected to equal-interval time-delay processing; then the current type digital-to-analog converter is controlled to charge and discharge an RC circuit, and accurately controlled conversion time is obtained; and the data with the controlled conversion time is driven to a CC channel through a unit gain buffer, and an output waveform is generated. Through the BMC transmitter, the problems of mutual influence of a digital module and an analog module in a power supply system due to different circuit properties of traditional BMC transmitter module and BMC receiver module, and power supply switch noises and relatively high chip area and power consumption due to the fact that an equal-interval data or clock driver of a conventional BMC transmitter is a digital buffer in the prior art are solved.

Description

technical field [0001] The invention relates to the technical field of circuit design, in particular to a BMC transmitter. Background technique [0002] At present, Type-C is an emerging USB (Universal Serial Bus, Universal Serial Bus) interface standard. With the support of the USB-PD protocol, it can provide higher data transmission speed, higher power online power supply capability and more Simple and lightweight system connection, and supports USB3.1 data and includes DP (DisplayPort, high-definition digital display standard interface), HDMI (High Definition Multimedia Interface, high-definition multimedia interface) and MHL (MobileHigh-Definition Link, mobile terminal high-definition audio and video Simultaneous transmission of various video data including standard interface). According to the USB-PD specification, the connection of Type-C upstream and downstream devices is completed after communication using the BMC (Biphase Mark Coding, biphase symbol coding) coding ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/36G06F30/39H03M5/02H03M1/08H03M1/742H03M5/12H04B1/0475
Inventor 陶成徐希季翔宇付家喜
Owner LONTIUM SEMICON CORP
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