Voltage level coding system and method

Abstract

We describe a voltage level encoding system and method. The voltage level encoding system includes a level encoder having an input receiving a data segment encoded with a first code and providing a second data code indicative of one of 2N plus at least one additional voltage level output, where each data segment is assigned to each voltage level. The converter code-converts the second data into such voltage levels. This voltage level is provided at the output of the converter. The method for encoding digital data includes: determining a first data transition, generating a code including at least one data asymmetry minimization in the first data transition; and encoding the first data with an additional level in the code Transitions are encoded.

Description

technical field [0001] The present invention relates to encoding systems and methods, and more particularly to voltage level encoding systems and methods. Background technique [0002] figure 1 is a block diagram of a typical data transmission system 100 including a transmitter 102 and a receiver 104 . The transmitter 102 receives the digital signal DATA_IN (data input) and uses its digital-to-analog converter (DAC) 106 to convert it into a transmittable analog DATA (data) signal. The transmitter 102 transmits the analog signal DATA to an analog-to-digital converter (ADC) 108 of the receiver 104 . The ADC 108 converts the analog signal DATA into a digital signal DATA_OUT (data_out). [0003] Transmitter 102 (and more specifically, ADC 106 ) may encode the DATA_IN signal before transmitting it to receiver 104 as a DATA signal. Transmitter 102 may encode DATA_IN using a variety of transmit codes including 8B / 10B encoding. [0004] Because 8B / 10B coding is a direct current...

AI Technical Summary

Problems solved by technology

One downside is that 8B / 10B encoding uses 10 bits for every 8 bits of data, thus reducing the data rate speed relative to wire speed

Because the larger the voltage transition, the longer it takes for the signal to reach the proper voltage signal level and thus the proper code state, these long state transitions create wide eye openings that adversely affect high frequency data transmissions

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