Multi-Stage Gate Bias Adjustment in Semiconductor Transistors
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Solution Overview
Problem
Existing semiconductor devices face challenges in accurately adjusting the gate voltage difference between transistors due to variations in resistance elements and discrepancies in effective threshold voltage, leading to inefficiencies and reduced yield.
Innovation Solution
The semiconductor device incorporates an adjustment circuit with multiple switch elements and level shifters to dynamically adjust the gate voltage difference between transistors, allowing for multiple stages of adjustment based on external control voltages, thereby compensating for variations and discrepancies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple adjustment circuit is used, then device complexity is reduced, but manufacturing precision of gate voltage difference deteriorates
Solution Approach 1:
The adjustment circuit is segmented into multiple independent adjustment stages, each controlled by separate switch elements (first switch element, second switch element). This allows the circuit to achieve high precision voltage difference adjustment through cumulative small adjustments, while each individual segment remains relatively simple in structure.
Solution Approach 2:
The adjustment circuit employs dynamic switching mechanisms where switch elements can be independently controlled to adjust the gate voltage difference in multiple stages. This dynamic adjustment capability enables the circuit to adapt to varying conditions and achieve precise control without requiring an overly complex fixed structure.
2Manufacturing precision
If multiple switch elements and level shifters are added to adjust gate voltage difference, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The adjustment circuit is divided into multiple independent adjustment stages, each controlled by separate switch elements (first switch element, second switch element). This segmentation allows the circuit to achieve high precision voltage difference adjustment through cumulative small adjustments, while each individual segment remains relatively simple in structure.
Solution Approach 2:
The circuit utilizes level shifters to change voltage parameters dynamically. By adjusting voltage levels through controlled switching, the circuit achieves precise gate voltage difference adjustment without requiring complex structural modifications, instead relying on parameter manipulation.
3Productivity
If gate voltage difference is not accurately adjusted, then device yield decreases, but adjustment circuit complexity is reduced
Solution Approach 1:
The adjustment circuit incorporates feedback mechanisms where the effect of each switching operation on the gate voltage difference can be monitored and used to control subsequent adjustments. This feedback enables the circuit to automatically compensate for variations and achieve accurate voltage difference adjustment, thereby improving device yield without requiring excessive complexity.
Solution Approach 2:
The adjustment circuit is divided into multiple independent adjustment stages, each controlled by separate switch elements (first switch element, second switch element). This segmentation allows the circuit to achieve high precision voltage difference adjustment through cumulative small adjustments, while each individual segment remains relatively simple in structure.
Data Source
AI summary
According to one embodiment, a semiconductor device includes a first terminal, a second terminal, a first transistor, a first circuit including a second transistor, and a second circuit including a first resistance element, a second resistance element, and a first switch element. A gate of the first transistor are coupled to a first node. A gate of the second transistor are coupled to a second node. One end and the other end of the first resistance element are coupled to the second node and the first node, respectively. One end and the other end of the second resistance element are coupled to a third node and the first node, respectively. The first switch element switches coupling and uncoupling between the second and third nodes. The second circuit adjusts a voltage difference between a gate voltage of the second transistor and a gate voltage of the first transistor by switching.