Semiconductor Write Toggle Reception With Adaptive Current Control
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Solution Overview
Problem
Semiconductor storage devices face challenges in accurately receiving write data due to variations in circuit configurations and reference potential shifts, leading to difficulties in maintaining the duty of toggle signals during high-speed operations.
Innovation Solution
The semiconductor storage device incorporates a configuration with a comparison circuit and a variable current source, where the comparison circuit generates a second toggle signal based on the relationship with a reference potential, and the sequencer adjusts the current output to optimize the waveform of the first toggle signal, ensuring accurate data acquisition even when the reference potential deviates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the semiconductor storage device operates at high speed to improve productivity, then data transmission speed increases, but the accuracy of receiving write data deteriorates due to variations in circuit configurations and reference potential shifts
Solution Approach 1:
The patent adjusts the reference potential dynamically based on detected variations in circuit configurations. By changing the reference potential parameter to compensate for circuit variations, the system maintains accurate data reception even at high operating speeds where timing margins are reduced.
Solution Approach 2:
The patent implements a feedback mechanism where the semiconductor storage device detects variations in circuit configurations and reference potentials, then uses this information to adjust the reference potential accordingly. This closed-loop approach ensures that data reception accuracy is maintained despite high-speed operation and circuit variations.
2Device complexity
If the reference potential is kept fixed to simplify the circuit configuration, then device complexity is reduced, but the reliability of data reception deteriorates when reference potential shifts occur
Solution Approach 1:
The patent transitions from a static reference potential to a dynamic one that can adjust based on detected circuit variations. The reference potential is no longer fixed but is modified in response to measured conditions, allowing the system to maintain reliability without requiring overly complex compensation circuits.
Solution Approach 2:
The semiconductor storage device performs self-diagnosis of circuit configuration variations and automatically adjusts its own reference potential accordingly. This self-service approach allows the system to maintain reliable data reception without external calibration or complex additional circuitry.
3Measurement precision
If the duty of toggle signals is maintained strictly to improve measurement precision, then data reception accuracy improves, but the adaptability to circuit variations deteriorates
Solution Approach 1:
The patent allows the duty cycle of toggle signals to vary dynamically based on detected circuit configurations rather than maintaining a strict fixed duty. By changing this parameter adaptively, the system achieves both accurate data reception and tolerance to circuit variations.
Solution Approach 2:
The system moves from rigid signal timing requirements to dynamic timing that adapts to circuit variations. The toggle signal characteristics are adjusted in real-time based on measured circuit conditions, enabling the system to maintain measurement precision across varying operational conditions.
Data Source
AI summary
According to one embodiment, a semiconductor storage device includes a receive unit configured to receive a first toggle signal. The semiconductor storage device includes a comparison circuit configured to generate and output a second toggle signal, wherein the second toggle signal switches based on a relationship of the first toggle signal relative to a reference potential. The semiconductor storage device includes a variable current source connected to the comparison circuit and configured to provide a current output. The semiconductor storage device includes a sequencer configured to adjust the current output from the current source based on an input control signal.