Variable Voltage Generation Circuit for Memory Devices
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Solution Overview
Problem
Semiconductor integrated circuits, such as memory devices, are sensitive to operational temperature variations, requiring precise voltage control to prevent malfunction and enhance performance, but existing solutions struggle to provide a wide output voltage range while maintaining linearity.
Innovation Solution
A variable voltage generation circuit with multiple amplification circuits that use temperature-varied and temperature-fixed voltages to generate output voltages across a wide range, expanding the voltage range through multiple feedback operations and ensuring linearity by accumulating voltage offsets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a single amplification circuit is used to generate output voltage, then the circuit structure is simple, but the output voltage range is limited with respect to operational temperature variations
Solution Approach 1:
The voltage generation system is divided into multiple amplification circuits (first amplification circuit and second amplification circuit), each responsible for different segments of the temperature range. The first amplification circuit handles lower temperature ranges while the second amplification circuit handles higher temperature ranges, allowing the system to cover a broader overall temperature range with appropriate voltage output for each segment.
Solution Approach 2:
The patent introduces an additional dimension by cascading multiple amplification circuits in series, where the output of the first amplification circuit serves as input to the second amplification circuit. This dimensional extension allows the system to achieve expanded voltage range capability without simply increasing the gain of a single circuit, thereby solving the temperature adaptation problem.
2Adaptability or versatility
If multiple amplification circuits are used to expand output voltage range, then the temperature adaptation improves, but the circuit complexity increases
Solution Approach 1:
The patent merges multiple amplification circuits into a unified voltage generation system where the circuits work together in a coordinated manner. The first and second amplification circuits are combined such that their outputs are integrated to provide a continuous expanded voltage range, reducing the overall system complexity compared to having separate independent voltage generation systems.
Solution Approach 2:
Each amplification circuit is designed with multi-functionality to handle both amplification and temperature compensation functions. The circuits use common reference voltages and feedback mechanisms, allowing them to serve multiple purposes simultaneously - expanding voltage range while maintaining temperature stability, thereby reducing the need for additional dedicated components.
3Stability of the object's composition
If temperature-varied voltage is used to compensate for temperature effects, then the temperature stability improves, but the linearity of voltage output deteriorates
Solution Approach 1:
The patent implements feedback mechanisms in both amplification circuits where the output voltages are fed back to adjust the input signals. The first feedback voltage from the first amplification circuit and the second feedback voltage from the second amplification circuit are used to maintain linearity by dynamically adjusting the amplification factors based on the actual output, thereby compensating for the non-linear effects introduced by temperature-varied voltage compensation.
Solution Approach 2:
The patent dynamically changes the operating parameters of the amplification circuits based on temperature conditions. By adjusting the gain parameters and reference voltages according to the operational temperature range, the system maintains linear voltage output characteristics while still providing temperature compensation. The parameter adjustments are designed to counteract the non-linear effects of temperature variations.
Data Source
AI summary
A variable voltage generation circuit includes a first amplification circuit and a second amplification circuit. The first amplification circuit generates a first output voltage based on a reference voltage, a first feedback voltage, a temperature-varied voltage and a temperature-fixed voltage such that the first output voltage is varied in a first voltage range according to a variation of the operational temperature. The first amplification circuit generates the first feedback voltage based on the first output voltage. The second amplification circuit generates a second output voltage based on the first feedback voltage, a second feedback voltage, the temperature-varied voltage and the temperature-fixed voltage such that the second output voltage is varied in a second voltage range wider than the first voltage range according to the variation of the operational temperature. The second amplification circuit generates the second feedback voltage based on the second output voltage.