Single Transformer-Based Gate Driver

A gate driver for power switching devices using a GHz band input. There is only one isolation point, so gate signals and power can be transmitted at the same time through one isolation point. An edge detector and pulse generating circuit on the primary side can detect each rising and falling edge of the original gate signal and generate a certain pulse width for these edges separately. A rectifier circuit on the secondary side rectifies the voltage transmitted from the primary side. The rectified voltage is used for the secondary side logic circuit and drive circuit. At the same time, a signal recovery circuit can recover original gate signals' rising edge and falling edge separately. The new gate driver circuit has a much simpler design and exchanges more information than existing solutions.