Adaptive Synchronization Receiving Circuit for Jitter Compensation
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Solution Overview
Problem
In communication systems where a transmitter does not provide a clock signal, timing drift caused by signal jitter leads to errors in data reception, as the receiver's self-generated clock signal fails to adapt to changing signal conditions.
Innovation Solution
A receiving circuit with adaptive synchronization, comprising a clock generator, edge detector, and synchronization unit, which generates and adjusts a clock signal based on input data signal edges to maintain accurate data latch, compensating for timing differences between the clock and data signal transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the receiver generates a clock signal based on the input data signal without external clock signals, then the receiver can perform synchronization, but timing drift occurs due to signal jitter leading to data reception errors
Solution Approach 1:
The patent applies dynamics by making the clock signal timing adjustable and adaptive. The synchronization unit dynamically adjusts the clock signal timing based on detected edge information from the data signal, allowing the system to adapt to timing variations and jitter rather than using a fixed clock generation method.
Solution Approach 2:
The patent implements feedback through the edge detector and synchronization unit that continuously monitor the data signal edges and adjust the clock signal timing accordingly. This closed-loop feedback mechanism compensates for timing drift and jitter, ensuring accurate data reception.
2Device complexity
If the receiver uses a fixed clock signal generation method, then the device complexity is low, but timing drift increases with time leading to errors in all subsequent latched data
Solution Approach 1:
The patent applies self-service by having the receiver automatically adjust its own clock signal timing based on the incoming data signal characteristics. The edge detector and synchronization unit enable the system to self-correct timing drift without external intervention or complex calibration procedures.
Solution Approach 2:
The patent changes the parameter of clock signal timing dynamically. Instead of using a fixed clock frequency and phase, the system adjusts the timing parameters of the clock signal in real-time based on detected data signal edges, thereby maintaining timing stability.
3Ease of operation
If the receiver latches data at fixed clock edges, then the operation is simple, but timing drift caused by jitter results in errors in latched data
Solution Approach 1:
The patent makes the data latching operation dynamic by adjusting the latch timing based on adaptive clock signal timing. Instead of latching at fixed clock edges, the system latches at dynamically adjusted edges that compensate for jitter, thereby maintaining latched data accuracy.
Solution Approach 2:
The feedback mechanism through the edge detector and synchronization unit ensures that the latch timing is continuously adjusted based on the actual data signal edges, providing precise data latching even in the presence of jitter.
Data Source
AI summary
A circuit with adaptive synchronization and a method thereof is provided. The synchronous receiving circuit adaptively adjusts the timing of a clock signal generated therein for receiving data without accompanying a clock signal for synchronization. The synchronous receiving circuit includes a clock generator, an edge detector, a synchronization unit and a latch. The clock generator generates a first clock signal according to an input data signal. The edge detector detects edges to generate an indication signal. The synchronization unit is coupled to the clock generator and the edge detector, and adaptively adjusts the first clock signal according to the indication signal. The latch latches the input data signal according to the adjusted first clock signal.