Memory Switch Module Pulse Width Control for Frequency Variations
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Solution Overview
Problem
High frequency variations in operating clock signals in memory systems lead to errors in data access operations, resulting in shorter turn-on periods and data access times due to fixed pulse width adjustments, which are inadequate for handling non-ideal frequency conditions.
Innovation Solution
An apparatus comprising a first and second pulse width adjusting unit, a decoder, and a frequency detector that adjusts the pulse widths of input and control signals based on detected frequencies to optimize switch module control, ensuring proper setup and hold times for address signals, thereby extending data access times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed pulse width adjustment is used to control the switch module, then the setup and hold times are ensured for ideal frequency ranges, but the turn-on period becomes excessively short at higher frequencies causing data access errors
Solution Approach 1:
The pulse width adjustment is made dynamic by detecting the operating frequency of the clock signal and automatically adjusting the pulse width accordingly. When the frequency is high, the pulse width is extended to maintain adequate turn-on period; when frequency is low, the pulse width is reduced to maintain timing margins. This dynamic adjustment resolves the contradiction between maintaining reliability across frequency variations and preserving adequate turn-on period.
Solution Approach 2:
The invention changes the pulse width parameter based on the detected operating frequency. By monitoring the clock signal frequency and adjusting the pulse width parameter in response, the system adapts to different operating conditions, ensuring that the switch module has sufficient turn-on period at high frequencies while maintaining proper setup and hold times at lower frequencies.
2Reliability
If the pulse width of the control signal is reduced to maintain setup and hold times at higher frequencies, then data access errors are prevented, but the data access time increases
Solution Approach 1:
Instead of using a fixed conservative pulse width that increases data access time, the system dynamically adjusts the pulse width based on the actual operating frequency. This allows the system to maintain short data access times at ideal frequencies while extending the pulse width only when necessary at higher frequencies to prevent errors, thus resolving the time-reliability trade-off.
Solution Approach 2:
The system performs self-adjustment by detecting its own operating frequency and automatically modifying the pulse width parameter accordingly. This self-service mechanism eliminates the need for external configuration or conservative fixed settings, allowing the system to optimize its own performance and minimize data access time while maintaining reliability.
3Reliability
If a longer pulse width is reserved for setup and hold times at higher frequencies, then decoding errors are prevented, but the switch module turn-on period becomes too short
Solution Approach 1:
The invention applies dynamic pulse width adjustment that responds to the operating frequency. At higher frequencies, the system extends the pulse width to provide adequate turn-on period for the switch module, while still maintaining the necessary setup and hold times for accurate decoding. This dynamic approach prevents the contradiction between decoding accuracy and switch module operation.
Solution Approach 2:
The pulse width parameter is changed based on the detected operating frequency to simultaneously satisfy both decoding requirements and switch module operation requirements. By adjusting this single parameter in response to frequency changes, the system maintains both decoding accuracy and adequate turn-on period without the trade-off present in fixed-width approaches.
Data Source
AI summary
An apparatus for controlling a switch module in a memory is disclosed. A first pulse width adjusting unit receives an input instruction signal and adjusts a pulse width of the input instruction signal to generate an adjusted input instruction signal according to a first pulse width adjustment. A decoder receives an input address signal and the adjusted input instruction signal to generate a control signal utilized for controlling a turn-on period of the switch module. A second pulse width adjusting unit receives the control signal and adjusts a pulse width of the control signal to generate an adjusted control signal according to a second pulse width adjustment. A frequency detector controls the first and second pulse width adjusting units to set the first and second pulse width adjustments according to a frequency of a specific signal in the memory.