III-V Integrated Circuit with Light Irradiation for Oscillation Control
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Solution Overview
Problem
High-frequency electronic components and integrated circuits using compound semiconductors suffer from slow transient responses, long settling times, and unwanted low-frequency oscillations, which hinder their performance.
Innovation Solution
Incorporating a radiation-coupled emitting device, such as a LED, that emits specific wavelengths of light to irradiate the integrated circuit, thereby reducing susceptibility to large time-constant effects like low-frequency oscillations by attenuating them.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If compound semiconductors are used in high-frequency integrated circuits, then the circuits can generate effects with large time-constants, but slow transient response and long settling times occur
Solution Approach 1:
The patent applies parameter changes by irradiating the compound semiconductor with light at specific wavelengths (400-1100 nm) to modify the carrier concentration and reduce the time-constant of the semiconductor material. This light irradiation changes the electrical parameters of the compound semiconductor, enabling faster transient response while maintaining the ability to generate large time-constant effects when needed.
2Duration of action of moving object
If compound semiconductors are used in high-frequency integrated circuits, then large time-constant effects can be generated, but low-frequency oscillations occur
Solution Approach 1:
The patent converts the harmful low-frequency oscillations into a beneficial effect by using light irradiation to control the carrier concentration in the compound semiconductor. The same light irradiation that was intended to speed up transient response also suppresses the unwanted low-frequency oscillations, turning a harmful phenomenon into a controllable and beneficial one.
3Duration of action of moving object
If compound semiconductors are used in high-frequency integrated circuits, then large time-constant effects can be generated, but long settling times occur
Solution Approach 1:
The patent uses light irradiation at wavelengths between 400-1100 nm to change the carrier concentration parameter in the compound semiconductor material. This parameter change reduces the time-constant and enables the circuit to settle faster, reducing settling time from milliseconds to microseconds or less, while still maintaining the ability to generate large time-constant effects when the light is not irradiating.
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 irradiation significantly reduces or eliminates low-frequency oscillations, improving the performance of high-frequency electronic components and integrated circuits by up to 70% compared to non-illuminated circuits.
Implementation Method 1
an emitting device for irradiating the integrated circuit
Implementation Method 2
irradiating the integrated circuit with the emitting device
Data Source
AI summary
What is described is a high-frequency integrated circuit provided on a III-V compound semiconductor, wherein an emitting device is radiation-coupled with the integrated circuit such that the emitting device irradiates the integrated circuit, and wherein the integrated circuit has at least one of an oscillator, a mixer, a phase shifter, a frequency divider or an amplifier.