Semiconductor Clock Leveling Circuit for Internal Phase Compensation
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Solution Overview
Problem
Semiconductor devices face challenges in efficiently compensating for phase differences between clock signals and division clock signals during operations, requiring complex phase adjustment mechanisms that can be costly and layout-intensive.
Innovation Solution
A semiconductor system comprising a phase control signal generation circuit, a phase detection circuit, and a selection/transmission circuit that generates and adjusts phase control signals to synchronize and adjust the leveling clock signal, allowing for efficient phase detection and adjustment between clock and leveling clock signals, thereby reducing layout area and operational complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complex phase adjustment mechanisms are used to compensate for phase differences between clock signals and division clock signals, then phase compensation accuracy is improved, but device complexity and layout area increase
Solution Approach 1:
The semiconductor device performs self-diagnosis of phase differences between clock signals and division clock signals. The phase detection circuit detects phase differences internally, and the control circuit automatically adjusts timing based on detected phase information, eliminating the need for complex external phase adjustment mechanisms.
Solution Approach 2:
The device implements a feedback mechanism where the phase detection circuit continuously monitors phase differences between clock signals and division clock signals, and the control circuit uses this feedback information to dynamically adjust timing parameters, achieving accurate phase compensation through closed-loop control rather than complex open-loop adjustment mechanisms.
2Measurement precision
If complex phase adjustment mechanisms are used to compensate for phase differences, then phase compensation accuracy is improved, but layout area increases
Solution Approach 1:
The patent combines multiple functions into integrated circuits: the phase detection circuit is integrated within the semiconductor device, and the control circuit merges phase adjustment functionality with existing clock signal generation and data I/O circuits, reducing the need for separate external phase adjustment components and minimizing layout area.
Solution Approach 2:
The semiconductor device performs self-diagnosis and self-adjustment of phase differences internally using integrated circuits, eliminating the need for external phase adjustment mechanisms that would require additional layout area. The device uses its own internal resources to achieve phase compensation.
3Measurement precision
If phase detection is performed using command-shifted signals, then phase detection accuracy is improved, but operational complexity increases
Solution Approach 1:
The control circuit dynamically selects between different phase detection methods based on operational mode. In normal operation mode, the device uses command-shifted signals for accurate phase detection. In self-test mode, the device switches to using clock-shifted signals, providing operational flexibility without permanently increasing complexity.
Solution Approach 2:
The phase detection circuit is designed to handle multiple signal types (command-shifted signals and clock-shifted signals) and multiple operational modes (normal operation and self-test). This multi-functional design allows the same circuit to achieve accurate phase detection across different scenarios without requiring separate dedicated circuits for each mode.
Data Source
AI summary
A semiconductor device includes a phase control signal generation circuit, a phase detection circuit, and a selection/transmission circuit. The phase control signal generation circuit outputs one of a command-shifted signal generated from a command/address signal and a clock-shifted signal generated from a clock signal as a phase control signal, based on a leveling enablement signal. The phase detection circuit detects a phase of a leveling clock signal in synchronization with the phase control signal to generate a detection signal. The selection/transmission circuit outputs the detection signal as one of a phase detection signal and a phase adjustment signal based on the leveling enablement signal.