Deserializer Circuit Logic Divider Clock Alignment
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Solution Overview
Problem
Existing deserializer architectures face challenges in reducing latency and power consumption while efficiently converting serial data to parallel data, particularly for 10-bit deserialization, as they require additional processing steps that increase latency and power usage.
Innovation Solution
A deserializer circuit is designed with a logic divider generating half, quarter, and mode rate clocks, along with a selection control signal, to align and control data sampling and latching processes, using a combination of sampling latches, a shift register, and multiplexer logic to efficiently convert serial data to parallel data, optimizing for both 8-bit and 10-bit operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a tree architecture is used for deserialization, then 8 bit deserialization is achieved, but additional multiplexer logic and divide by 10 clock processing are required for 10 bit deserialization which increases latency
Solution Approach 1:
The shift register based architecture is designed to handle both 8-bit and 10-bit deserialization operations using the same core structure. The circuit can be configured to operate in different modes (8-bit or 10-bit) without requiring separate dedicated paths, making it a universal solution that eliminates the need for additional multiplexer logic and divide-by-10 clock processing that would be required in tree architectures for 10-bit operations.
Solution Approach 2:
The architecture uses dynamic configuration where the shift register can be reconfigured between 8-bit and 10-bit modes through control signals. This dynamic adaptability allows the same hardware to optimize its operation for different data widths, reducing the fixed latency overhead that would result from additional processing stages needed in static tree architectures.
2Loss of time
If shift register based architecture is used to reduce latency, then both 8 bit and 10 bit deserialization are enabled, but more latches are added resulting in more power consumption
Solution Approach 1:
The invention optimizes the shift register architecture by carefully controlling the number and configuration of latches based on the operating mode. For 8-bit operations, fewer latches are activated compared to 10-bit mode, allowing the circuit to adjust its power consumption characteristics dynamically. This parameter optimization reduces unnecessary latch switching activity and minimizes power consumption while maintaining low latency performance.
Solution Approach 2:
The architecture implements partial action by activating only the necessary number of latches and shift register stages required for the current operation mode. Rather than always maintaining all possible stages active, the circuit dynamically enables only what is needed, reducing power consumption from idle latch operations while preserving the low-latency benefits of the shift register approach.
3Adaptability or versatility
If additional processing steps are added to handle 10 bit deserialization in tree architecture, then 10 bit capability is achieved, but latency and power consumption increase
Solution Approach 1:
The shift register architecture provides a universal platform that natively supports both 8-bit and 10-bit deserialization without requiring additional processing steps. The same shift register stages and latches are used for both modes, configured differently based on the input data width, thereby achieving adaptability without the latency and power penalties of additional hardware stages.
Solution Approach 2:
The deserialization process is segmented into configurable stages within the shift register, allowing flexible allocation of processing steps based on the required bit length. For 10-bit operations, the shift register is configured to use an appropriate number of stages, eliminating the need for additional multiplexer logic and intermediate processing that would be required in tree architectures, thus maintaining low latency while achieving versatility.
Data Source
AI summary
Methods and deserializer circuits are provided for generating a parallel data signal by converting serial data of a serial data signal to parallel data. In a particular embodiment, the deserializer circuit includes a logic divider configured to generate based on a half rate clock, a quarter rate clock, a mode rate clock, and a selection control signal. The deserializer circuit includes a first set of latches for sampling and aligning the serial data from the serial data signal into the deserializer circuit based on the half rate clock. The deserializer circuit also includes a shift register including a second set of latches configured to latch the output of the first set of latches based on the quarter rate clock generated by the logic divider. In the particular embodiment, the deserializer circuit also includes multiplexer logic configured to output the parallel data signal including latching data from the shift register.