Serial transmitter and voltage drop compensation circuit of feed-forward equalization circuit thereof

A feedforward equalization and voltage drop compensation technology, applied in the field of serial transmitters, can solve the problems of large extra power consumption, area overhead, poor adjustability, etc., and achieve the effect of small impact, low power consumption overhead, and small circuit complexity

Active Publication Date: 2022-08-05
奉加微电子(昆山)有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the disadvantages in the prior art that performing voltage stabilization and denoising on the serial transmitter feed-forward equalization circuit easily lead to a large amount of extra power consumption, area overhead and poor adjustability, and provide a serial transmitter The voltage drop compensation circuit of the machine and its feed-forward equalization circuit

Method used

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  • Serial transmitter and voltage drop compensation circuit of feed-forward equalization circuit thereof
  • Serial transmitter and voltage drop compensation circuit of feed-forward equalization circuit thereof
  • Serial transmitter and voltage drop compensation circuit of feed-forward equalization circuit thereof

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Embodiment 1

[0042] see figure 1 As shown, this embodiment specifically provides a voltage drop compensation circuit 100 of a feedforward equalization circuit of a serial transmitter. The feedforward equalization circuit 200 is used to equalize the input signal of the serial transmitter and output it through the driving module 51 ; The current fluctuation caused by the input signal transmission process forms a power supply voltage drop in the drive module 51; the voltage drop compensation circuit includes a voltage drop estimation module 1 and a current source compensation module 2;

[0043] The input end of the voltage drop estimation module 1 is electrically connected to the input end of the feedforward equalization circuit 200; the output end of the voltage drop estimation module 1 is electrically connected to the input end of the current source compensation module 2 and the input end of the driving module 51 respectively; the current source The input terminal of the compensation module...

Embodiment 2

[0066] This embodiment specifically provides a serial transmitter, which includes a feedforward equalization circuit and a voltage drop compensation circuit of the feedforward equalization circuit in Embodiment 1; the related settings and embodiments of the feedforward equalization circuit and the voltage drop compensation circuit thereof 1 is the same and will not be repeated here. By setting the voltage drop compensation circuit of the feedforward equalization circuit, the serial transmitter of this embodiment adds an additional adjustable parallel current branch on the basis of the traditional source series terminal to increase the output swing for voltage drop compensation, It realizes small extra power consumption, small circuit complexity, small impact on the original circuit, and does not affect the compensation effect of output impedance and output common-mode voltage, and can be flexibly and conveniently applied to the formed serial port transmitter. On the premise of...

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Abstract

The invention discloses a serial transmitter and a voltage drop compensation circuit of a feed-forward equalization circuit thereof. The voltage drop compensation circuit comprises a voltage drop estimation module and a current source compensation module. The input end of the voltage drop estimation module is electrically connected with the input end of the feed-forward equalization circuit; the output end of the voltage drop estimation module is electrically connected with the input end of the current source compensation module and the input end of the driving module. The input end of the current source compensation module is also electrically connected with the input end of the driving module; the output end of the current source compensation module is electrically connected with the output end of the driving module; the voltage drop estimation module is used for generating a voltage drop compensation control signal corresponding to a current fluctuation level caused in an input signal transmission process; and the current source compensation module is used for generating compensation current for power supply voltage drop according to the voltage drop compensation control signal and the input signal received by the driving module. The voltage drop compensation circuit is high in compensation accuracy, high in adaptability, low in extra power consumption and low in circuit complexity.

Description

technical field [0001] The invention relates to the technical field of serial transmitters, in particular to a serial transmitter and a voltage drop compensation circuit of a feedforward equalization circuit thereof. Background technique [0002] Due to the low-pass filtering characteristics of the signal transmission line, signals of different frequencies suffer different attenuation during the transmission process from the serial transmitter to the serial receiver, resulting in serious inter-symbol crosstalk, which affects the receiver's ability to understand the current symbol. Therefore, the serial receiver will use different equalization processing methods to reduce the influence of the low-pass characteristics of the signal transmission line. In order to relieve the equalization processing pressure of the serial receiver, the serial transmitter usually performs feedforward equalization processing on the signal. [0003] Feedforward equalization usually includes genera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/04H04B1/12
CPCH04B1/0475H04B1/12Y02D10/00
Inventor 陈俊坤
Owner 奉加微电子(昆山)有限公司
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