Precharge Signal Generation Circuit Clock Control
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Solution Overview
Problem
Conventional precharge signal generation circuits in memory devices experience undesirable current consumption due to the continuous supply of a clock signal during the period between the application of an active command and a write or read command, leading to inefficient power usage.
Innovation Solution
A precharge signal generation circuit that activates a control signal in response to a read or write command, receiving a clock signal only during a specified delay time after the command is input, thereby reducing unnecessary current consumption by controlling the clock signal supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the clock signal is continuously supplied from the time point when the active command is applied to the time point when the precharge signal is activated, then the precharge signal generation circuit can operate correctly and generate the precharge signal at the appropriate time, but the current consumption of the precharge signal generation circuit increases
Solution Approach 1:
The patent applies periodic action by controlling the clock signal to be supplied only during the specific period when it is needed for precharge signal generation. The clock signal is supplied from the time point when the write command or read command is input until the precharge signal is activated, and stopped at other times. This periodic supply of the clock signal reduces current consumption while ensuring the precharge signal is generated correctly when needed.
2Use of energy by moving object
If the clock signal is supplied only during the period when the precharge signal needs to be generated, then the current consumption is reduced, but the precharge signal generation circuit may not operate correctly if the clock signal is not available when needed
Solution Approach 1:
The patent applies preliminary action by starting the clock signal supply exactly when the write command or read command is input, which is the moment when the precharge signal generation process needs to begin. This ensures that the clock signal is available from the start of the required operation, allowing the precharge signal to be generated correctly without delay, while stopping the clock signal supply as soon as the precharge signal is activated to reduce power consumption.
3Reliability
If the clock signal supply period is extended to ensure reliable precharge signal generation, then the precharge signal can be generated correctly, but the current consumption increases due to unnecessary clock signal supply
Solution Approach 1:
The patent applies the taking out principle by extracting the clock signal supply to only the essential period when it is needed for precharge signal generation. The clock signal is supplied from the time point when the write command or read command is input until the precharge signal is activated, and is stopped at other times. This extraction of the clock signal supply to the minimum necessary period reduces energy loss while ensuring reliable precharge signal generation.
Data Source
AI summary
A precharge signal generation circuit includes a control signal generation unit configured to activate a control signal in response to a read command or write command and a precharge signal generation unit configured to use a clock signal in a period when the control signal is activated to activate a precharge signal at a time point when a delay time passes from an input of the read command or the write command to precharge signal generation circuit.