Termination Circuit Control for Low-Power Impedance Matching
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Solution Overview
Problem
As electronic systems operate at higher speeds, impedance mismatching between internal devices and circuits becomes more likely, leading to inefficiencies and increased power consumption, which existing impedance matching circuits using on-die or on-chip termination circuits fail to adequately address.
Innovation Solution
The electronic system incorporates a termination circuit connected to a reception node to perform impedance matching, with a drive control signal generation circuit generating first and second drive control signals based on a mode signal, allowing the system to inactivate these signals when not necessary, thereby reducing power consumption by inhibiting unnecessary operations of the drive circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If on-die termination circuit or on-chip termination circuit is employed to solve impedance mismatching, then impedance matching is improved, but power consumption increases due to continuous operation of drive control signals
Solution Approach 1:
The patent applies periodic action by controlling the drive control signals to be activated only during specific periods when data transmission is required, and inactivated during other periods. The mode signal controls the drive control signal generation circuit to generate drive control signals only when needed, thereby reducing power consumption while maintaining impedance matching performance during active transmission periods.
Solution Approach 2:
The patent implements dynamics by making the drive control signals dynamic rather than static - they are generated and activated based on the mode signal condition, allowing the system to adapt its impedance matching operation to actual transmission needs. This dynamic control enables the system to switch between active impedance matching and power-saving states.
2Productivity
If drive control signals are continuously generated based on internal data, then data transmission capability is maintained, but unnecessary operations increase power consumption
Solution Approach 1:
The mode signal controls the drive control signal generation circuit to generate drive control signals only during specific periods when data transmission is required. During inactive periods, the drive control signals are inactivated regardless of internal data values, eliminating unnecessary operations and reducing power consumption while maintaining data transmission capability when needed.
Solution Approach 2:
The system discards the generation of drive control signals when they are not needed for data transmission, as controlled by the mode signal. This selective discarding of unnecessary signal generation operations reduces power consumption without compromising the ability to recover and generate drive control signals when data transmission is required.
Data Source
AI summary
An electronic system includes a reception device and a transmission device. The reception device generates reception data from transmission data input to a reception node and includes a termination circuit which is coupled to the reception node to perform an impedance matching operation. The transmission device generates a drive control signal from internal data based on a mode signal and drives the transmission data based on the drive control signal.