Transmitter Encoding Data Bits to Reduce Crosstalk in Parallel Channels
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Solution Overview
Problem
In high-speed parallel data interfaces, crosstalk between channels occurs due to signal transitions, which hinders data transmission and increases as semiconductor devices become more integrated, necessitating a reduction in crosstalk influence between channels.
Innovation Solution
A transmitter and receiver system that encodes data bits into code bits to minimize risk patterns, reducing crosstalk by converting data bits into transmission signals and decoding code bits back into data bits, utilizing an encoder and decoder with specific logic circuits to manage transitions and risk patterns across channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If data bits are transmitted in parallel through channels, then data transmission speed is improved, but crosstalk between adjacent channels increases
Solution Approach 1:
The patent changes the parameter of signal transition by using transition prediction to determine whether to invert the data signal before transmission. When a transition is predicted in an adjacent channel, the signal is inverted to cancel the harmful crosstalk effect, thereby maintaining high-speed parallel transmission while reducing interference between channels
Solution Approach 2:
The patent implements feedback by using transition prediction based on detected patterns in previously transmitted data. The system continuously monitors data transitions and uses this information to predict future transitions, allowing the inversion control to be dynamically adjusted in response to actual transmission conditions, thus effectively managing crosstalk while maintaining transmission speed
2Adaptability or versatility
If semiconductor devices are highly integrated, then device functionality is improved, but distance between channels decreases causing increased crosstalk influence
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting signal inversion based on transition prediction. As devices become more integrated and channels closer together, the system predicts transitions in adjacent channels and inverts signals accordingly to cancel crosstalk, enabling high integration without excessive interference
Solution Approach 2:
The patent uses preliminary action through transition prediction that occurs before the actual signal transmission. By detecting patterns in previously transmitted data and predicting future transitions, the system prepares inversion control in advance, allowing the transmitter to preemptively counteract crosstalk effects before they occur, thus supporting high integration while maintaining signal integrity
Data Source
AI summary
Disclosed is a transmitter which includes an encoder and a transmission interface circuit. The encoder receives data bits and generates conversion bits, a number of is the conversion bits being more than a number of the data bits, based on the number of the data bits. The encoder detects a risk pattern of the conversion bits to generate detection data and converts the risk pattern into a replacement pattern based on the detection data to generate code bits, a number of is the code bits being equal to the number of the conversion bits.