Oxide Semiconductor Memory Circuit for Low-Power Transmission Bias Control
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Solution Overview
Problem
Portable information terminals, such as smartphones, face challenges in reducing power consumption while improving communication speed, leading to increased power consumption and heat generation, which affects the reliability and productivity of semiconductor devices.
Innovation Solution
A semiconductor device is designed with a transmitter unit, receiver unit, bias-outputting unit, and controller unit, utilizing oxide semiconductor transistors with a memory unit that retains data even when power is stopped, allowing for efficient power management and reduced consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If communication speed is improved, then data processing capability increases, but power consumption increases
Solution Approach 1:
The semiconductor device is divided into multiple independent transistor units (first transistor, second transistor, third transistor, fourth transistor) with distinct functions. The first and second transistors handle write operations while the third and fourth transistors handle read operations, allowing simultaneous independent operation and reducing overall power consumption while maintaining high communication speed.
Solution Approach 2:
The memory device employs periodic refresh operations for the capacitor to maintain stored data. The control circuit periodically supplies reference potentials to the capacitor without requiring continuous power supply to all transistor components, enabling the device to maintain operational state with reduced power consumption during idle periods.
2Use of energy by moving object
If power consumption is reduced, then energy efficiency improves, but data retention capability may deteriorate
Solution Approach 1:
The control circuit pre-charges the capacitor to a specific potential before write operations and pre-discharges it before read operations. This preliminary action ensures that the capacitor is always in a known state, enabling reliable data retention even when power is reduced or interrupted, as the capacitor can quickly return to its reference potential state.
Solution Approach 2:
The capacitor serves as an intermediary energy storage element between the transistors and the external power supply. It stores electrical charge locally, allowing the memory device to retain data temporarily without continuous external power, thus bridging the gap between reduced power consumption and reliable data retention.
3Speed
If transistor switching speed is increased, then communication throughput improves, but power consumption increases
Solution Approach 1:
The transistor circuit is segmented into write-path transistors (first, second) and read-path transistors (third, fourth) that can operate independently. This segmentation allows each transistor to switch at optimal speeds for its specific function without requiring all transistors to operate at maximum speed simultaneously, reducing overall power consumption while maintaining high communication throughput.
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 semiconductor device achieves reduced power consumption, stable operation, high reliability, and increased productivity by optimizing power usage and data retention using oxide semiconductor technology.
Implementation Method 1
A semiconductor layer of the first transistor includes an oxide semiconductor
Data Source
AI summary
A semiconductor device with reduced power consumption is provided. The semiconductor device includes a transmitter unit, a receiver unit, a bias-outputting unit, and a controller unit. The bias-outputting unit has a plurality of memory units. The plurality of memory units each retains information to determine transmission power. The receiver unit receives a request signal transmitted from a base station and supplies it to the controller unit. The controller unit selects one of the plurality of memory units according to the request signal. The memory unit has an OS transistor and retains information when power supply is stopped.