PHY Encoding Chain with Flip-Flop Timing Alignment for High-Speed Links
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In high-speed serial data communication systems like MIPI C-PHY, the challenge is to avoid timing violations due to long gate delays in hardware components, which are exacerbated by low voltage operation and high data rates, making it difficult to meet the timing requirements of unit intervals.
Innovation Solution
The proposed solution involves an encoding and decoding architecture with multiple units coupled in series, where each unit converts symbol values to wire states, and flip-flops are used to align timing, allowing encoding operations to be completed within a longer clock cycle, thereby alleviating the timing requirements on hardware components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If low voltage operation is used to optimize energy consumption, then energy efficiency is improved, but gate delays increase making it difficult to meet timing requirements
Solution Approach 1:
The encoding circuit is divided into multiple encoding units that process different symbols in parallel. Each encoding unit handles a portion of the encoding task independently, allowing the overall encoding operation to be completed within the required time window even with longer gate delays caused by low voltage operation.
Solution Approach 2:
The patent transitions from sequential encoding of single symbols to parallel encoding of multiple symbols across different dimensions (symbol indices). By processing multiple symbols simultaneously in different encoding units, the system compensates for increased gate delays through spatial parallelism rather than temporal sequencing.
2Productivity
If high data rate transmission is implemented to achieve high throughput, then transmission speed is improved, but timing violations occur due to insufficient time for encoding operations
Solution Approach 1:
The high data rate transmission requirement is met by segmenting the encoding task into multiple parallel encoding units. Each unit processes a symbol independently and simultaneously, so the total encoding throughput scales with the number of units while each unit operates within the available time window, avoiding timing violations.
Solution Approach 2:
The parallel encoding architecture enables continuous encoding operations across multiple symbols without idle waiting periods. While one encoding unit completes its operation, others are already processing subsequent symbols, ensuring continuous useful action that maintains high data throughput without exceeding timing constraints.
Data Source
AI summary
A physical layer circuit at a transmitter includes an encoding chain and a plurality of flip-flops. The encoding chain, including encoding units coupled in series, is configured to encode a plurality of symbols to generate a plurality of first wire states. The encoding units are arranged to receive the symbols respectively, and convert respective symbol values of the symbols to the first wire states respectively. A first encoding unit is configured to convert a symbol value of a corresponding symbol according to a second wire state provided by a second encoding unit. The flip-flops are arranged to receive and output the first wire states according to a clock signal, respectively. One of the flip-flops is coupled between the first encoding unit and the second encoding unit. The second wire state provided by the second encoding unit is sent to the first encoding unit through the one of the flip-flops.