Patent ID: 9190993
Filing Date: 2015-11-17
Classification: H03K

Abstract:
1. A high-voltage switch comprising: a switching device, the switching device being a normally-off n-channel MOSFET having a gate terminal, a drain terminal, and a source terminal; a chain of transistors, the transistors being normally-on n-channel JFETs each having a gate terminal, a drain terminal, and a source terminal, where transistors are connected in series drain-to-source, where the source of the first transistor in the chain is connected to the drain of the switching device; for each transistor in the chain from the second transistor in the chain to the penultimate transistor in the chain, there is a clamping device associated with the transistor, where an anode of the clamping device is connected to the source of the transistor, and a cathode of the clamping device is connected to the gate of the next transistor in the chain; an additional clamping device associated with the first transistor in the chain, where an anode of the additional clamping device is connected to the source of the first transistor in the chain and a cathode of the additional clamping device is connected to the gate of the second transistor in the chain, where the gate of the first transistor in the chain is connected to the source of the switching device; and for each transistor in the chain from the second transistor in the chain to the last transistor in the chain, a load circuit comprising a resistor, the load circuit being connected between the drain of the transistor and the gate of the transistor.