Current Output Circuit with Precharge Control for Transistor Protection
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Solution Overview
Problem
Current output circuits face reliability issues due to the application of high voltage to transistors, which can lead to damage, especially in miniaturized transistors, resulting from the low breakdown voltage caused by manufacturing processes or miniaturization.
Innovation Solution
Incorporating a control circuit with a switch circuit and resistive elements to manage the voltage applied to transistors, ensuring that the source-drain path of transistors is protected by creating a voltage drop, thereby preventing high voltage from being applied directly to the transistors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a high voltage is applied to the source-drain path of a transistor to enable current output, then the current output capability is improved, but the transistor may be damaged due to low breakdown voltage, worsening reliability
Solution Approach 1:
The control circuit activates the output circuit before the input current is applied to the input circuit. This preliminary activation ensures that the output circuit is ready to handle the current output without subjecting the transistor to high voltage stress during the startup phase, thereby preventing damage while maintaining current output capability
Solution Approach 2:
The control circuit prevents high voltage from being applied to the transistor's source-drain path by activating the output circuit in advance. This preliminary protective action counteracts the potential harmful effect of high voltage before it can cause damage to the transistor, ensuring reliable operation
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 solution effectively reduces the risk of transistor damage and improves the reliability of current output circuits by controlling the voltage applied to the transistors, ensuring they operate within safe limits.
Implementation Method 1
ensuring that the source-drain path of transistors is protected by creating a voltage drop, thereby preventing high voltage from being applied directly to the transistors
Data Source
AI summary
A current output circuit includes an input circuit that outputs a second current in response to a first current when the first current is inputted, an output circuit that outputs a third current in response to the second current, and a control circuit that causes the output circuit to output a current when a control signal is inputted before the first current is inputted to the input circuit. The output circuit includes transistors of a first group and the input circuit includes transistors of a second group.