Edge-Triggered Termination Circuit for Low-Power Signal Integrity
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Solution Overview
Problem
Existing termination circuits in electronic circuits face challenges in maintaining high signal waveform quality due to issues such as increased power consumption, delayed signal transmission, and insufficient termination operations, particularly with varying power supply voltages and manufacturing variations.
Innovation Solution
A termination circuit with a control circuit that dynamically controls the operation of transistors in first and second paths to enable these paths during specific edges of an input signal, ensuring transient termination and reducing simultaneous transistor states, thereby stabilizing operation and minimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a termination circuit is provided to improve signal waveform quality, then signal waveform quality is improved, but power consumption increases
Solution Approach 1:
The patent applies dynamic control to the termination circuit by using a control circuit that dynamically adjusts the termination resistance based on the signal edge detection. The first transistor is activated during rising edges and the second transistor during falling edges, making the termination dynamically adaptive rather than static, thereby reducing continuous power consumption while maintaining signal quality.
Solution Approach 2:
The termination circuit operates periodically based on signal edges rather than continuously. The control circuit detects signal edges and activates the appropriate transistor only during these periodic events (rising or falling edges), converting continuous power consumption into periodic, event-driven operation that maintains effectiveness while reducing overall energy usage.
2Reliability
If termination circuits are provided to improve signal waveform quality, then signal waveform quality is improved, but signal transmission delay increases
Solution Approach 1:
The control circuit performs preliminary action by detecting signal edges and activating the appropriate transistor in advance during the transition periods. This preliminary activation ensures that the termination is already in place when needed, reducing the overall transmission delay while maintaining signal waveform quality through proactive rather than reactive termination.
3Reliability
If termination circuits are provided to improve signal waveform quality, then signal waveform quality is improved, but operation stability deteriorates due to varying power supply voltages and manufacturing variations
Solution Approach 1:
The patent employs parameter changes by using a control circuit that adjusts the termination resistance value dynamically based on detected signal characteristics. This allows the circuit to compensate for manufacturing variations and power supply voltage fluctuations by adapting the resistance parameter in real-time, thereby maintaining stable operation and consistent signal waveform quality across different operating conditions.
Data Source
AI summary
A termination circuit including: a first circuit provided in a first path that couples a first signal terminal and a first power supply node, the first circuit being configured to enable the first path; a second circuit provided in a second path that couples the first signal terminal and a second power supply node, the second circuit being configured to enable the second path; and a control circuit that is configured to perform a first operation including controlling an operation of the first circuit to enable the first path during a first period that corresponds to a rising edge of a first input signal at the first signal terminal, and controlling an operation of the second circuit to enable the second path during a second period that corresponds to a falling edge of the first input signal.