Termination Control Circuit for Dynamic Impedance Matching
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Solution Overview
Problem
Electronic devices face impedance mismatch issues during high-speed data transmission, which existing termination circuits struggle to effectively address, leading to inefficiencies and potential power consumption increases.
Innovation Solution
The implementation of a write shift circuit, clock generation circuit, and termination control circuit that generate specific signals and activate termination resistors during write operations to manage impedance matching, adjusting signal periods based on write commands and latency signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a termination circuit is used to match impedance during high-speed data transmission, then impedance matching is improved, but power consumption increases
Solution Approach 1:
The termination circuit is activated periodically only during write operations rather than continuously. The control circuit generates a termination enablement signal that activates the termination resistor during the write operation period signal, allowing impedance matching only when needed for write operations, thereby reducing overall power consumption while maintaining reliable data transmission during critical operations
Solution Approach 2:
The termination resistor is selectively applied only to specific data lines during write operations rather than being continuously applied to all lines. The control circuit enables the termination resistor based on the write operation period signal, creating localized impedance matching exactly where and when it is needed, thus improving impedance matching effectiveness while minimizing power consumption
2Reliability
If termination resistor is activated continuously, then impedance matching is maintained, but power consumption increases
Solution Approach 1:
The termination resistor is activated periodically only during write operations rather than continuously. The control circuit generates a termination enablement signal that activates the termination resistor during the write operation period signal, allowing impedance matching only when needed for write operations, thereby reducing overall power consumption while maintaining reliable data transmission during critical operations
Solution Approach 2:
The continuous activation of the termination resistor is extracted and replaced with selective activation during write operations only. The control circuit removes the unnecessary continuous power consumption by enabling the termination resistor only during the write operation period signal, separating the essential impedance matching function from the wasteful continuous operation
Data Source
AI summary
An electronic device includes a write shift circuit configured to generate, when a write operation is performed, a period signal which is activated for a clock enable period, based on a write command in synchronization with a write clock signal. The electronic device also includes a clock generation circuit configured to generate, when the write operation is performed, the write clock signal based on the period signal. The electronic device further includes a termination control circuit configured to generate a termination enablement signal, based on the period signal in the write operation, which is activated for a termination operation period.