Phase Rotator Clock Alignment for Variable-Delay Data Latching
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Solution Overview
Problem
In high-speed multiplexer circuitry, accurately latching data signals across unknown or varying signal line delays is challenging due to uncertainties in process, voltage, and temperature variations, which affects data recovery and synchronization.
Innovation Solution
A multiplexer circuitry with a data transmitter, a control unit comprising a data receiver and phase detector, and a phase rotator that adjusts the transmission clock signal based on phase measurements relative to a reception clock signal to synchronize data transmission and recovery, ensuring accurate phase alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data is transmitted across a signal line with unknown or varying delay, then data transmission can proceed, but accurate latching of the received data becomes difficult
Solution Approach 1:
The patent implements a feedback mechanism where the phase detector continuously monitors the phase relationship between the received data signal and the reception clock signal, and the phase rotator adjusts the transmission clock signal phase based on this feedback to maintain optimal timing alignment despite signal line delay variations
Solution Approach 2:
The patent replaces traditional mechanical or fixed timing alignment methods with an electronic phase detection and rotation system that dynamically adjusts timing parameters through electrical signal processing, enabling adaptive synchronization without physical reconfiguration
2Measurement precision
If the phase of the transmission clock signal is adjusted dynamically, then data recovery accuracy is improved, but circuit complexity increases
Solution Approach 1:
The phase detector and control unit form a self-regulating system that automatically detects phase errors and adjusts the transmission clock signal without external intervention, enabling the circuit to self-correct timing misalignments caused by PVT variations or signal line delays
3Productivity
If circuitry operates at increasing speeds with miniaturisation, then productivity is improved, but operating accuracy becomes more difficult to maintain
Solution Approach 1:
The patent transitions from static timing alignment to a dynamic system where the phase rotator continuously adjusts the transmission clock signal phase in real-time, allowing the circuit to adapt to timing variations that occur at higher operating speeds and miniaturized dimensions
Data Source
AI summary
The present disclosure relates to phase alignment, in particular to phase alignment circuitry (and parts thereof) for example for use in a multiplexer or other circuitry in which data is transmitted from one stage to another. Consideration is given to phase detection and phase rotation. Such circuitry may be implemented as integrated circuitry, for example on an IC chip.