Temperature-Compensated Delay Circuit for DRAM Command Timing
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Solution Overview
Problem
The instability of clock cycles due to temperature fluctuations affects the timing requirements between command signals in semiconductor memories like DRAM, leading to performance issues during operations such as Error Check and Scrub (ECS), as the timing conditions are not consistently met.
Innovation Solution
A delay control circuit comprising a clock circuit and a delay circuit that generates a temperature-independent first clock signal, allowing for precise delay processing of initial command signals to meet preset timing conditions, using a temperature adjustment mechanism to stabilize the clock cycle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional clock circuit is used without temperature compensation, then the device complexity is low, but the clock cycle becomes unstable under temperature variations, causing timing requirements to be not met
Solution Approach 1:
The patent applies parameter changes by adjusting the clock circuit's operating parameters based on temperature conditions. A temperature detection circuit monitors temperature and generates adjustment signals that modify the clock circuit's parameters (such as voltage or frequency) to compensate for temperature-induced variations, thereby maintaining stable clock cycles and meeting timing requirements under varying temperature conditions.
Solution Approach 2:
The patent implements feedback through a temperature detection circuit that continuously monitors temperature and feeds back adjustment signals to the clock circuit. This closed-loop feedback mechanism enables the clock circuit to automatically compensate for temperature variations, maintaining stable clock cycles without requiring manual intervention or complex external control systems.
2Measurement precision
If temperature compensation mechanisms are added to stabilize clock cycles, then the timing accuracy improves, but the device complexity increases
Solution Approach 1:
The patent achieves improved timing accuracy through parameter changes by adjusting the clock circuit's operating parameters based on temperature detection. The temperature detection circuit generates adjustment signals that modify key parameters (voltage, frequency) of the clock circuit, enabling precise compensation for temperature effects and maintaining accurate timing without requiring overly complex circuit architectures.
Solution Approach 2:
The patent replaces complex mechanical or hardware-based temperature compensation mechanisms with an electronic control approach. Instead of using physical components that change with temperature (such as temperature-compensated crystals or mechanical adjustments), the patent uses electronic detection and signal processing to achieve timing accuracy, thereby reducing overall device complexity while maintaining precision.
3Productivity
If the clock cycle is stabilized against temperature variations, then the productivity and performance of memory operations improve, but the use of energy increases due to temperature detection and adjustment mechanisms
Solution Approach 1:
The patent improves memory operation performance through parameter changes by dynamically adjusting the clock circuit's parameters based on temperature conditions. This enables the system to maintain optimal performance across varying temperatures without requiring excessive energy consumption, as the adjustments are made only when temperature variations affect timing requirements, rather than continuously over-driving the system.
Solution Approach 2:
The patent applies partial action by implementing temperature compensation only when and where needed, rather than continuously maximizing performance. The temperature detection circuit activates compensation mechanisms selectively based on actual temperature conditions and timing requirement compliance, avoiding unnecessary energy consumption while maintaining sufficient productivity for memory operations under normal operating conditions.
Data Source
AI summary
Provided in the embodiments of the present disclosure are a delay control circuit and method, and a semiconductor memory. The delay control circuit includes a clock circuit and a delay circuit. The clock circuit is configured to receive a temperature adjustment signal, and generate a first clock signal according to the temperature adjustment signal; and a clock cycle of the first clock signal is a preset value. The delay circuit is configured to receive the first clock signal and an initial command signal, and perform delay processing on the initial command signal according to the first clock signal, so as to obtain a target command signal; and a time interval between the target command signal and the initial command signal meets a preset timing condition.