Insulated Switching Circuit for High-Voltage Semiconductor Testing

The patent replaces the mechanically driven reed relay with a semiconductor switch that uses electromagnetic fields and light signals for control. The switching action is achieved through electronic means rather than mechanical movement, eliminating wear and tear on moving parts and significantly extending the service life of the switching device.

The patent introduces an intermediary control mechanism where a control signal is transmitted through an insulation barrier to activate the semiconductor switch. This intermediary approach allows the switching function to be decoupled from mechanical drive, enabling the use of solid-state components that have no moving parts and thus much longer operational life.

The patent divides the high-voltage insulation requirement into multiple segments by introducing intermediate voltage levels between the high-voltage side and the low-voltage control side. Instead of requiring a single insulation barrier to withstand the full high voltage, the system uses multiple insulation stages, each handling a portion of the voltage stress, thereby enabling the use of semiconductor switches while maintaining high overall withstand voltage capability.

The patent introduces intermediary voltage levels and insulation barriers between the high-voltage switching node and the low-voltage control circuitry. These intermediaries allow the semiconductor switch to operate at high switching speeds while the insulation system is distributed across multiple stages, each designed to handle manageable voltage levels, thus achieving both high speed and high withstand voltage.

The patent segments the insulation structure into multiple stages, each providing a portion of the total withstand voltage capability. This segmentation allows the system to achieve high overall insulation strength while keeping each individual insulation component manageable in complexity. The multi-stage approach distributes the electrical stress across several barriers rather than requiring one complex high-voltage barrier.

The patent addresses the withstand voltage requirement by adding dimensional complexity to the insulation architecture - introducing multiple voltage levels and insulation layers in series. This dimensional approach to insulation (stacking multiple insulation barriers) allows the system to achieve high withstand voltage capability while maintaining reasonable complexity at each individual stage, as each stage operates at a lower voltage level.