Semiconductor Device Differential Signal Phase Detection Mode Control
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Solution Overview
Problem
In semiconductor devices, maintaining a 180-degree phase difference in differential data strobe signals is challenging due to noise and power conservation issues, leading to false data recognition and increased uncertainty in clock signal generation, which is exacerbated by the need for additional circuitry in gate training processes.
Innovation Solution
A semiconductor device with a differential signal phase detector that generates a mode control signal to switch between differential and single modes based on the phase detection of the differential data strobe signal, allowing the receiver to operate effectively in either mode to prevent erroneous data activation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gate training process is used to prevent false data recognition, then data quality is improved, but device complexity increases due to additional circuitry
Solution Approach 1:
The patent extracts and eliminates the gate training process and its associated circuitry from the system. By using a different approach (ODT control) to achieve the same goal of preventing false data recognition, the unnecessary complexity of gate training is removed while maintaining data quality.
Solution Approach 2:
The patent makes the ODT control mechanism serve multiple functions: it both controls signal termination and prevents false data recognition, eliminating the need for separate gate training circuitry while achieving the same reliability improvements.
2Use of energy by moving object
If receiver termination is disconnected during idle periods to conserve power, then energy consumption is reduced, but false data recognition occurs during transition periods
Solution Approach 1:
The patent applies preliminary action by controlling ODT to be activated in advance during the transition from idle to data transfer periods. This ensures that the termination condition is restored before data arrives, preventing false data recognition while maintaining power savings during idle periods.
Solution Approach 2:
The patent implements dynamic control of the ODT based on the operational state (idle vs. data transfer). The ODT is selectively enabled or disabled according to the current mode, allowing the system to optimize between power consumption and data recognition accuracy in different operational contexts.
3Use of energy by moving object
If ODT or POD termination is used during idle periods, then power is conserved, but phase difference between differential signals is lost leading to clock signal uncertainty
Solution Approach 1:
The patent uses preliminary action by enabling ODT control before the transition from idle to data transfer mode. This ensures that when differential signals are needed for accurate phase detection, the ODT is already active to maintain signal integrity, preventing phase difference loss.
Solution Approach 2:
The patent implements dynamic switching of ODT control based on operational mode. During idle periods, ODT is disabled to save power; during data transfer periods, ODT is enabled to maintain signal integrity and phase detection accuracy, allowing the system to adapt to different operational requirements.
Data Source
AI summary
A semiconductor device receiving a differential data strobe signal and a method of operating the same are provided. The semiconductor device includes a differential signal phase detector receiving a differential signal including a first signal and a second signal, detecting a phase of the differential signal, and generating a mode control signal; and a receiver receiving the differential signal and a reference voltage and performing a processing operation using the differential signal in a differential mode or using the first signal and the reference voltage in a single mode according to the mode control signal. The semiconductor device may be a memory controller. Data transfer may be disabled in the single mode to prevent false data recognition due to noise.