Oscillation Period Detection Circuit with Valid Time Reforming
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Solution Overview
Problem
Current methods for detecting the oscillation period in Dynamic Random Access Memory (DRAM) suffer from low detection accuracy and efficiency, which is crucial for chip quality assessment.
Innovation Solution
An oscillation period detection circuit comprising an oscillator module, a control module, and a counting module that processes enable signals and oscillation clock signals to determine a target time and period number, thereby calculating the oscillation period accurately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional detection methods are used for oscillation period in DRAM, then the detection process is simple, but the detection accuracy and efficiency are low
Solution Approach 1:
The detection circuit is divided into three independent functional modules: oscillator module (generates oscillation clock signal), control module (performs valid time reforming), and counting module (performs period counting). This segmentation allows each module to specialize in one function, improving overall detection accuracy while maintaining manageable complexity through modular design.
Solution Approach 2:
The patent introduces intermediary processing steps between signal generation and measurement: the control module acts as an intermediary that performs valid time reforming on the enable signal based on the oscillation clock signal, and the counting module serves as an intermediary that counts periods. These intermediaries ensure accurate synchronization and measurement, resolving the contradiction between accuracy and complexity.
2Productivity
If conventional detection methods are used for oscillation period in DRAM, then the circuit structure is simple, but the detection efficiency is low
Solution Approach 1:
The control module performs valid time reforming processing in advance to align the enable signal with the oscillation clock signal periods. This preliminary action ensures that the counting module receives properly synchronized signals, enabling efficient and accurate period counting without requiring complex real-time adjustment mechanisms.
Solution Approach 2:
The oscillator module continuously generates oscillation clock signals, and the counting module continuously counts periods within the valid time window. This continuous operation without interruption or re-initialization significantly improves detection efficiency while the modular structure keeps complexity manageable.
3Adaptability or versatility
If the detection circuit processes both high-speed and low-speed clocks, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The detection circuit is designed with universal components that can handle various clock speeds: the oscillator module generates clock signals regardless of frequency, the control module's valid time reforming logic works with any oscillation period, and the counting module counts periods universally. This multi-functionality achieves clock speed adaptability without requiring speed-specific circuit variations, thus avoiding complexity increases.
Data Source
AI summary
An oscillation period detection circuit and method, and semiconductor memory are provided. The oscillation period detection circuit includes an oscillator module, a control module, and a counting module. The oscillator module includes a target oscillator, and is configured to receive an enable signal and control the target oscillator to output an oscillation clock signal according to the enable signal; the control module is configured to receive the enable signal and the oscillation clock signal, and perform valid time reforming processing according to the oscillation clock signal and the enable signal to determine a target time; the counting module is configured to receive the enable signal and the oscillation clock signal, and perform period counting processing according to the enable signal and the oscillation clock signal to determine a target period number. The oscillation period of the target oscillator is calculated according to the target time and the target period number.