Switching Apparatus Precise Switching Time Control
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Solution Overview
Problem
Conventional voltage-controlled switches, such as field-effect transistors, require complex drive circuits to control switching times, which can be cumbersome and inefficient in test apparatuses.
Innovation Solution
A switching apparatus with a switch that adjusts its connection state based on a control voltage, driven by a section that supplies the appropriate voltage corresponding to a control signal, and a changing section that modifies the control voltage according to a designated switching time, allowing for precise control of switching times.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a conventional drive circuit is used to control the switching time of a switch, then the switching time can be controlled, but the configuration becomes complicated
Solution Approach 1:
The invention extracts the switching time control function from the complex conventional drive circuit and implements it through a simplified mechanism using a capacitor connected between the gate and source of the FET. The capacitor is charged/discharged through current control to achieve precise switching time control without requiring complex drive circuitry with multiple components and control logic.
Solution Approach 2:
The invention changes the control parameter from complex voltage waveform generation to simple current control. By controlling the charging/discharging current of the capacitor, the switching time is precisely controlled. The key parameter becomes the current magnitude and duration rather than complex voltage timing sequences.
2Loss of time
If the drive voltage is increased to control switching time detection, then the switching time can be controlled, but the configuration becomes complicated
Solution Approach 1:
The capacitor inherently provides the voltage waveform needed for switching time control through its natural charging and discharging behavior. The FET's own gate capacitance is utilized, and the capacitor automatically generates the appropriate voltage profile when charged/discharged, eliminating the need for external voltage generation and detection circuits.
3Device complexity
If a simple switch is used without switching time control, then the configuration is simple, but the switching time cannot be controlled
Solution Approach 1:
The invention introduces dynamic control capability to a simple switch configuration by adding a capacitor that can be charged and discharged. This dynamic element allows the switching time to be adjusted and controlled while maintaining overall circuit simplicity. The system transitions from static switching to dynamically controllable switching.
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 simplifies the control of switching times in test apparatuses, enabling more efficient and precise switching operations without the complexity of traditional drive circuits.
Implementation Method 1
a field-effect transistor (FET) which provides a connection or a disconnection between a first terminal and a second terminal... the FET has a gate-source junction to which a control voltage is applied... switches the connection state according to the applied control voltage
Implementation Method 2
a driving section which changes the control voltage to be applied to the gate-source junction, according to a designated switching time... controls the switching time of the FET
Data Source
AI summary
Provided is a switching apparatus that switches a connection state between two terminals, comprising a switch that switches the connection state between the two terminals according to a control voltage supplied thereto; a driving section that provides the switch with the control voltage corresponding to a control signal supplied thereto; and a changing section that changes the control voltage output from the driving section, according to a designated switching time. The changing section may change power supplied as a power supply to the driving section, according to the designated switching time. The changing section may change the control voltage output from the driving section prior to switching of the switch.