Oxide Semiconductor Circuit for Simplified Memory Design
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Summary
Problems
Existing semiconductor devices require multiple power sources and circuit configurations to manage different voltage levels, leading to increased complexity, circuit area, and power consumption, particularly in memory systems where multiple memory cells and controllers are needed.
Innovation solutions
A circuit configuration using oxide semiconductors that eliminates the need for level shifters or voltage generation circuits by employing capacitive coupling to generate and utilize potentials higher than a single power source, incorporating transistors and capacitors to manage voltage levels without additional circuit elements.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If multiple power sources and voltage generation circuits are used to manage different voltage levels, then the required voltage levels can be achieved, but the circuit complexity increases
Why choose this principle:
The patent combines multiple voltage generation functions into a single circuit configuration. The first and second capacitors work together with the transistors to generate both first and second power sources with different voltage levels from a single input, eliminating the need for separate voltage generation circuits for each power level.
Principle concept:
If multiple power sources and voltage generation circuits are used to manage different voltage levels, then the required voltage levels can be achieved, but the circuit complexity increases
Why choose this principle:
The circuit configuration performs multiple functions using a unified structure. The same circuit elements (capacitors, transistors) are used to generate multiple power sources, charge storage capacitors, and control voltage levels across different memory cells, making the circuit universally applicable for various voltage requirements.
Application Domain
Data Source
AI summary:
A circuit configuration using oxide semiconductors that eliminates the need for level shifters or voltage generation circuits by employing capacitive coupling to generate and utilize potentials higher than a single power source, incorporating transistors and capacitors to manage voltage levels without additional circuit elements.
Abstract
Since power source voltages are different depending on circuits used for devices, a circuit for outputting at least two or more power sources is additionally prepared. An object is to unify outputs of the power source voltages. A transistor using an oxide semiconductor is provided in such a manner that electrical charge is retained in a node where the transistor and a capacitor are electrically connected to each other, a reset signal is applied to a gate of the transistor to switch the states of the transistor from off to on, and the node is reset when the transistor is on. A circuit configuration that generates and utilizes a potential higher than or equal to a potential of a single power source can be achieved.