High Frequency Module Gate Bias Circuit for Leakage Control
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Solution Overview
Problem
Conventional high frequency semiconductor devices face challenges in high temperature electrical conducting tests due to increased gate leakage current, which leads to reduced gate bias voltage and self-heating, making it difficult to implement high temperature operations effectively.
Innovation Solution
The high frequency module incorporates a high temperature operating use gate bias circuit and operating use gate bias circuit, connected to the semiconductor device via specific striplines and bleeder resistance circuits, allowing direct control of the gate terminal voltage without relying on external power supplies, thus avoiding bias jumping and enabling high temperature operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If resistance is inserted between gate power and gate terminal to communalize external power supply, then device complexity is reduced, but gate bias voltage becomes small when gate leakage current increases at high temperature
Solution Approach 1:
The gate bias control is segmented into two independent circuits: a first gate bias control circuit for normal operation connected via bleeder resistance, and a second gate bias control circuit for high temperature operation connected directly without resistance. This segmentation allows each circuit to be optimized for its specific operating condition, resolving the contradiction between device complexity and voltage stability.
Solution Approach 2:
The system dynamically switches between two gate bias control modes based on operating temperature. At normal temperatures, the first circuit with bleeder resistance is used for communalized power supply. At high temperatures, the second circuit without resistance is activated to maintain adequate gate bias voltage despite increased gate leakage current, preventing bias jumping.
2Adaptability or versatility
If resistance is inserted in gate bias circuit, then external power supply can be communalized, but self-heating increases and causes bias jumping at high temperature
Solution Approach 1:
The gate bias control is segmented into two independent circuits: a first gate bias control circuit for normal operation connected via bleeder resistance, and a second gate bias control circuit for high temperature operation connected directly without resistance. This segmentation allows each circuit to be optimized for its specific operating condition, resolving the contradiction between device complexity and voltage stability.
Solution Approach 2:
The second gate bias control circuit is prepared in advance to counteract the harmful effects of gate leakage current at high temperatures. By providing a direct connection path for gate bias voltage that bypasses the bleeder resistance, the circuit preemptively prevents bias jumping and self-heating before they occur during high temperature operation.
3Ease of operation
If gate bias voltage becomes small due to gate leakage current, then bias jumping occurs, but high temperature electrical conducting test becomes difficult
Solution Approach 1:
The system dynamically switches between two gate bias control modes based on operating temperature. At normal temperatures, the first circuit with bleeder resistance is used for communalized power supply. At high temperatures, the second circuit without resistance is activated to maintain adequate gate bias voltage despite increased gate leakage current, preventing bias jumping.
Solution Approach 2:
The second gate bias control circuit is configured in advance to provide sufficient gate bias voltage under high temperature conditions. By having this alternative circuit ready and connected to the gate terminal, the system can immediately respond to high temperature operation without experiencing bias jumping, enabling reliable high temperature electrical conducting tests.
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 allows for stable high temperature current conducting operations without bias jumping and reduces dependence on external power supplies, making the module suitable for high frequency applications in microwave, millimeter wave, and submillimeter wave bands.
Implementation Method 1
since resistance is inserted between gate power and gate terminal of the high frequency semiconductor device, if gate leakage current increases at the time of high temperature operating use, the value of gate bias voltage will become small
Data Source
AI summary
According to one embodiment, provided is a high frequency module comprising: a semiconductor device; an input matching circuit; an output matching circuit; a high temperature operating use gate bias circuit and operating use gate bias circuit connected to the input matching circuit; a high temperature operating use gate bias terminal connected to the high temperature operating use gate bias circuit; an operating use gate bias terminal connected to the operating use gate bias circuit; a high frequency input terminal connected to the input matching circuit; a drain bias circuit connected to the output matching circuit; a drain bias terminal connected to the drain bias circuit; and a high frequency output terminal connected to the output matching circuit, wherein the high frequency module is housed by one package.