Develop Reference Voltage Generator for Sense Amplifiers
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Solution Overview
Problem
The sensing speeds of sense amplifiers in semiconductor memory devices are unstable due to manufacturing variations in transistors, which affect the optimal operation and consistency of develop voltages required for these devices, especially in low power consumption circuits.
Innovation Solution
A develop reference voltage generator that adjusts the develop reference voltage based on the threshold voltage of transistors in the sense amplifiers, using a proportional voltage generating unit, buffer unit, and voltage boosting unit to generate a develop voltage with a high current level, ensuring stable sensing speeds by accounting for variations in transistor threshold voltages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a uniform develop reference voltage is provided regardless of manufacturing variations, then the circuit design is simple, but the sensing speeds of sense amplifiers become unstable
Solution Approach 1:
The patent applies local quality by generating different develop reference voltages for different sense amplifiers based on their individual transistor threshold voltage characteristics. Each sense amplifier receives a customized reference voltage that matches its specific transistor properties, rather than a uniform voltage for all amplifiers. This is achieved through separate voltage generation circuits for each sense amplifier, allowing each to operate with optimal voltage levels despite manufacturing variations.
Solution Approach 2:
The patent changes the parameter of develop reference voltage from a fixed uniform value to variable values that adapt to transistor threshold voltage variations. The voltage generation circuits adjust the reference voltage parameter based on the specific transistor characteristics of each sense amplifier, thereby optimizing sensing speed performance across different devices while maintaining circuit functionality.
2Use of energy by moving object
If the voltage difference between develop voltage and transistor threshold voltage is reduced for low power consumption, then power consumption decreases, but manufacturing variations cause unstable sensing speeds
Solution Approach 1:
The patent implements local quality by providing customized develop reference voltages for each sense amplifier based on its specific transistor threshold voltage. This allows each amplifier to operate with the optimal voltage difference between develop voltage and threshold voltage, maximizing sensing speed while minimizing power consumption. The individualized voltage adjustment compensates for manufacturing variations, ensuring consistent performance across all amplifiers despite process differences.
Solution Approach 2:
The patent adjusts the develop reference voltage parameter to match the specific threshold voltage characteristics of each sense amplifier's transistors. By changing the voltage parameter dynamically based on transistor properties, the system maintains the optimal voltage difference for low power consumption while compensating for manufacturing variations to ensure consistent sensing speeds across all devices.
Data Source
AI summary
I describe and claim a device and method for generating develop voltage signals. The device includes a sense amplifier to sense a voltage difference between a plurality of bit lines responsive to a develop voltage signal, and a voltage generator to generate the develop voltage signal responsive to a reference voltage signal and according to an electrical characteristic of at least one transistor associated with the sense amplifier.