Semiconductor Device High-Pass Matching Circuit Gain
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Solution Overview
Problem
Conventional semiconductor devices experience a significant decrease in linear gain during high-output operations due to increased loss of high-frequency signals, which interrupts the achievement of high output and high gain.
Innovation Solution
The semiconductor device incorporates a high-pass matching circuit with a configuration that includes capacitative elements and wiring patterns on a dielectric substrate, allowing for impedance matching across varying output levels, thereby reducing the difference in impedance during large and small signal operations and maintaining high gain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional matching circuits are used in semiconductor devices, then the device can operate at high output, but the linear gain decreases largely due to increased loss of high-frequency signals
Solution Approach 1:
The patent applies parameter changes by transforming the matching circuit from a conventional low-pass type to a high-pass type. This fundamental parameter change in circuit topology alters the frequency response characteristics, enabling the circuit to pass high-frequency signals with minimal loss while maintaining impedance matching at high output power levels. The high-pass configuration specifically addresses the signal loss problem by allowing high-frequency components to pass through the matching network more efficiently.
2Power
If conventional matching circuits are used, then the device can achieve high output, but the impedance difference between large and small signal operations increases, interrupting high gain operation
Solution Approach 1:
The patent applies dynamics by designing a matching circuit that adapts to varying operating conditions. The high-pass matching circuit configuration enables dynamic impedance matching that remains effective across different signal power levels. The circuit structure inherently accommodates the impedance variations that occur during large signal operations, maintaining stable matching performance without requiring external adjustment mechanisms.
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
This configuration effectively suppresses the decrease in linear gain during large signal matching, enabling the semiconductor device to operate with high output and high gain, even at high frequencies.
Implementation Method 1
the first metal layer and the ground metal layer form a first capacitative element, and the second metal layer and the ground metal layer form a second capacitative element
Data Source
AI summary
A semiconductor device includes a semiconductor chip, a dielectric substrate, and bonding wires. The dielectric substrate includes wiring patterns formed on a surface and a ground metal layer formed on a back side. The semiconductor chip includes an active element and a drain pad that is connected to an output end of the active element. Wiring pattern is formed at a position closer to the drain pad than wiring pattern, wiring pattern and the ground metal layer constitute a first capacitative element, and wiring pattern and the ground metal layer constitute a second capacitative element. The drain pad is connected to wiring pattern through bonding wire, and connected to wiring pattern through bonding wire. Bonding wire and the first capacitative element constitute a high-pass matching circuit.