Delay Circuit for Data Reading Signal Timing
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Solution Overview
Problem
Conventional data reading devices can incorrectly operate due to static electricity, leading to wrong outputs from the oscillation stop detection circuit, potentially causing data to be wrongly written in nonvolatile storage elements, as the potential state during reading is similar to that during writing.
Innovation Solution
Incorporation of a delay circuit to delay the data reading signal after power-on or reset cancellation, ensuring a minimum necessary delay width to prevent incorrect writing, and utilizing a combination of frequency signals and known components like capacitance and resistance to generate this delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If data reading is performed immediately after power-on or reset cancellation, then the system responds quickly, but static electricity can cause wrong operation and incorrect data writing
Solution Approach 1:
The delay circuit is configured to automatically delay the data reading signal for a predetermined period after power-on or reset cancellation before allowing the reading operation to proceed. This preliminary delay action ensures that any static electricity effects subside before the reading operation, preventing wrong operations while maintaining automatic protection without requiring additional control logic
2Reliability
If a delay circuit is added to prevent wrong writing, then data integrity is improved, but device complexity increases
Solution Approach 1:
The delay circuit is constructed using simple, inexpensive components such as resistors and capacitors that form an RC time constant circuit. These components are readily available, easy to implement, and provide the necessary delay function without requiring complex logic circuits or additional integrated circuits, thus minimizing the increase in device complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The delay circuit effectively prevents incorrect writing in nonvolatile storage elements by ensuring the data reading operation is synchronized correctly, even when static electricity affects the system, thereby maintaining data integrity.
Implementation Method 1
utilizing a combination of frequency signals and known components like capacitance and resistance to generate this delay
Implementation Method 2
utilizing a combination of frequency signals and known components like capacitance and resistance to generate this delay
Data Source
AI summary
There is disclosed a data reading device in which data of a nonvolatile storage element is reflected in a circuit to be regulated, with a minimum necessary delay width after turning a power on or after reset cancellation, and wrong writing due to a static electricity is prevented. A delay circuit is additionally disposed to output a delayed data reading signal after a signal of turning the power on or a signal of the reset cancellation is generated. A delay time T2 and a static electricity convergence time T1 are set so as to keep a relation of T1<T2.